- Public Sub InsertRow(myConnectionString As String)
- " If the connection string is null, use a default.
- If myConnectionString = "" Then
- myConnectionString = "Database=Test;Data Source=localhost;User Id=username;Password=pass"
- End If
- Dim myConnection As New MySqlConnection(myConnectionString)
- Dim myInsertQuery As String = "INSERT INTO Orders (id, customerId, amount) Values(1001, 23, 30.66)"
- Dim myCommand As New MySqlCommand(myInsertQuery)
- myCommand.Connection = myConnection
- myConnection.Open()
- myCommand.ExecuteNonQuery()
- myCommand.Connection.Close()
- End Sub
-
-
- public void InsertRow(string myConnectionString)
- {
- // If the connection string is null, use a default.
- if(myConnectionString == "")
- {
- myConnectionString = "Database=Test;Data Source=localhost;User Id=username;Password=pass";
- }
- MySqlConnection myConnection = new MySqlConnection(myConnectionString);
- string myInsertQuery = "INSERT INTO Orders (id, customerId, amount) Values(1001, 23, 30.66)";
- MySqlCommand myCommand = new MySqlCommand(myInsertQuery);
- myCommand.Connection = myConnection;
- myConnection.Open();
- myCommand.ExecuteNonQuery();
- myCommand.Connection.Close();
- }
-
-
- Public Sub CreateMySqlCommand()
- Dim myConnection As New MySqlConnection _
- ("Persist Security Info=False;database=test;server=myServer")
- myConnection.Open()
- Dim myTrans As MySqlTransaction = myConnection.BeginTransaction()
- Dim mySelectQuery As String = "SELECT * FROM MyTable"
- Dim myCommand As New MySqlCommand(mySelectQuery, myConnection, myTrans)
- myCommand.CommandTimeout = 20
- End Sub
-
-
- public void CreateMySqlCommand()
- {
- MySqlConnection myConnection = new MySqlConnection("Persist Security Info=False;
- database=test;server=myServer");
- myConnection.Open();
- MySqlTransaction myTrans = myConnection.BeginTransaction();
- string mySelectQuery = "SELECT * FROM myTable";
- MySqlCommand myCommand = new MySqlCommand(mySelectQuery, myConnection,myTrans);
- myCommand.CommandTimeout = 20;
- }
-
-
- public:
- void CreateMySqlCommand()
- {
- MySqlConnection* myConnection = new MySqlConnection(S"Persist Security Info=False;
- database=test;server=myServer");
- myConnection->Open();
- MySqlTransaction* myTrans = myConnection->BeginTransaction();
- String* mySelectQuery = S"SELECT * FROM myTable";
- MySqlCommand* myCommand = new MySqlCommand(mySelectQuery, myConnection, myTrans);
- myCommand->CommandTimeout = 20;
- };
-
-
- Public Sub CreateMySqlCommand()
- Dim myCommand As New MySqlCommand()
- myCommand.CommandType = CommandType.Text
- End Sub
-
-
- public void CreateMySqlCommand()
- {
- MySqlCommand myCommand = new MySqlCommand();
- myCommand.CommandType = CommandType.Text;
- }
-
-
- Public Sub CreateMySqlCommand()
- Dim sql as String = "SELECT * FROM mytable"
- Dim myCommand As New MySqlCommand(sql)
- myCommand.CommandType = CommandType.Text
- End Sub
-
-
- public void CreateMySqlCommand()
- {
- string sql = "SELECT * FROM mytable";
- MySqlCommand myCommand = new MySqlCommand(sql);
- myCommand.CommandType = CommandType.Text;
- }
-
-
- Public Sub CreateMySqlCommand()
- Dim conn as new MySqlConnection("server=myServer")
- Dim sql as String = "SELECT * FROM mytable"
- Dim myCommand As New MySqlCommand(sql, conn)
- myCommand.CommandType = CommandType.Text
- End Sub
-
-
- public void CreateMySqlCommand()
- {
- MySqlConnection conn = new MySqlConnection("server=myserver")
- string sql = "SELECT * FROM mytable";
- MySqlCommand myCommand = new MySqlCommand(sql, conn);
- myCommand.CommandType = CommandType.Text;
- }
-
-
- Public Sub CreateMySqlCommand()
- Dim conn as new MySqlConnection("server=myServer")
- conn.Open();
- Dim txn as MySqlTransaction = conn.BeginTransaction()
- Dim sql as String = "SELECT * FROM mytable"
- Dim myCommand As New MySqlCommand(sql, conn, txn)
- myCommand.CommandType = CommandType.Text
- End Sub
-
-
- public void CreateMySqlCommand()
- {
- MySqlConnection conn = new MySqlConnection("server=myserver")
- conn.Open();
- MySqlTransaction txn = conn.BeginTransaction();
- string sql = "SELECT * FROM mytable";
- MySqlCommand myCommand = new MySqlCommand(sql, conn, txn);
- myCommand.CommandType = CommandType.Text;
- }
-
-
- Public Sub CreateMySqlCommand()
- Dim myCommand As New MySqlCommand()
- myCommand.CommandText = "SELECT * FROM Mytable ORDER BY id"
- myCommand.CommandType = CommandType.Text
- End Sub
-
-
- public void CreateMySqlCommand()
- {
- MySqlCommand myCommand = new MySqlCommand();
- myCommand.CommandText = "SELECT * FROM mytable ORDER BY id";
- myCommand.CommandType = CommandType.Text;
- }
-
-
- Public Sub CreateMySqlCommand()
- Dim myCommand As New MySqlCommand()
- myCommand.CommandType = CommandType.Text
- End Sub
-
-
- public void CreateMySqlCommand()
- {
- MySqlCommand myCommand = new MySqlCommand();
- myCommand.CommandType = CommandType.Text;
- }
-
-
- Public Sub CreateMySqlCommand()
- Dim mySelectQuery As String = "SELECT * FROM mytable ORDER BY id"
- Dim myConnectString As String = "Persist Security Info=False;database=test;server=myServer"
- Dim myCommand As New MySqlCommand(mySelectQuery)
- myCommand.Connection = New MySqlConnection(myConnectString)
- myCommand.CommandType = CommandType.Text
- End Sub
-
-
- public void CreateMySqlCommand()
- {
- string mySelectQuery = "SELECT * FROM mytable ORDER BY id";
- string myConnectString = "Persist Security Info=False;database=test;server=myServer";
- MySqlCommand myCommand = new MySqlCommand(mySelectQuery);
- myCommand.Connection = new MySqlConnection(myConnectString);
- myCommand.CommandType = CommandType.Text;
- }
-
-
- Public Sub CreateMySqlCommand(myConnection As MySqlConnection, _
- mySelectQuery As String, myParamArray() As MySqlParameter)
- Dim myCommand As New MySqlCommand(mySelectQuery, myConnection)
- myCommand.CommandText = "SELECT id, name FROM mytable WHERE age=@age"
- myCommand.UpdatedRowSource = UpdateRowSource.Both
- myCommand.Parameters.Add(myParamArray)
- Dim j As Integer
- For j = 0 To myCommand.Parameters.Count - 1
- myCommand.Parameters.Add(myParamArray(j))
- Next j
- Dim myMessage As String = ""
- Dim i As Integer
- For i = 0 To myCommand.Parameters.Count - 1
- myMessage += myCommand.Parameters(i).ToString() & ControlChars.Cr
- Next i
- Console.WriteLine(myMessage)
- End Sub
-
-
- public void CreateMySqlCommand(MySqlConnection myConnection, string mySelectQuery,
- MySqlParameter[] myParamArray)
- {
- MySqlCommand myCommand = new MySqlCommand(mySelectQuery, myConnection);
- myCommand.CommandText = "SELECT id, name FROM mytable WHERE age=@age";
- myCommand.Parameters.Add(myParamArray);
- for (int j=0; j<myParamArray.Length; j++)
- {
- myCommand.Parameters.Add(myParamArray[j]) ;
- }
- string myMessage = "";
- for (int i = 0; i < myCommand.Parameters.Count; i++)
- {
- myMessage += myCommand.Parameters[i].ToString() + "\n";
- }
- MessageBox.Show(myMessage);
- }
-
-
- Public Sub CreateMySqlCommand(myExecuteQuery As String, myConnection As MySqlConnection)
- Dim myCommand As New MySqlCommand(myExecuteQuery, myConnection)
- myCommand.Connection.Open()
- myCommand.ExecuteNonQuery()
- myConnection.Close()
- End Sub
-
-
- public void CreateMySqlCommand(string myExecuteQuery, MySqlConnection myConnection)
- {
- MySqlCommand myCommand = new MySqlCommand(myExecuteQuery, myConnection);
- myCommand.Connection.Open();
- myCommand.ExecuteNonQuery();
- myConnection.Close();
- }
-
-
- Public Sub CreateMySqlDataReader(mySelectQuery As String, myConnection As MySqlConnection)
- Dim myCommand As New MySqlCommand(mySelectQuery, myConnection)
- myConnection.Open()
- Dim myReader As MySqlDataReader
- myReader = myCommand.ExecuteReader()
- Try
- While myReader.Read()
- Console.WriteLine(myReader.GetString(0))
- End While
- Finally
- myReader.Close
- myConnection.Close
- End Try
- End Sub
-
-
- public void CreateMySqlDataReader(string mySelectQuery, MySqlConnection myConnection)
- {
- MySqlCommand myCommand = new MySqlCommand(mySelectQuery, myConnection);
- myConnection.Open();
- MMySqlDataReader myReader;
- myReader = myCommand.ExecuteReader();
- try
- {
- while(myReader.Read())
- {
- Console.WriteLine(myReader.GetString(0));
- }
- }
- finally
- {
- myReader.Close();
- myConnection.Close();
- }
- }
-
-
- Public Sub CreateMySqlCommand(myScalarQuery As String, myConnection As MySqlConnection)
- Dim myCommand As New MySqlCommand(myScalarQuery, myConnection)
- myCommand.Connection.Open()
- myCommand.ExecuteScalar()
- myConnection.Close()
- End Sub
-
-
- public void CreateMySqlCommand(string myScalarQuery, MySqlConnection myConnection)
- {
- MySqlCommand myCommand = new MySqlCommand(myScalarQuery, myConnection);
- myCommand.Connection.Open();
- myCommand.ExecuteScalar();
- myConnection.Close();
- }
-
-
- public:
- void CreateMySqlCommand(String* myScalarQuery, MySqlConnection* myConnection)
- {
- MySqlCommand* myCommand = new MySqlCommand(myScalarQuery, myConnection);
- myCommand->Connection->Open();
- myCommand->ExecuteScalar();
- myConnection->Close();
- }
-
-
-
- public sub PrepareExample()
- Dim cmd as New MySqlCommand("INSERT INTO mytable VALUES (@val)", myConnection)
- cmd.Parameters.Add( "@val", 10 )
- cmd.Prepare()
- cmd.ExecuteNonQuery()
-
- cmd.Parameters(0).Value = 20
- cmd.ExecuteNonQuery()
- end sub
-
-
- private void PrepareExample()
- {
- MySqlCommand cmd = new MySqlCommand("INSERT INTO mytable VALUES (@val)", myConnection);
- cmd.Parameters.Add( "@val", 10 );
- cmd.Prepare();
- cmd.ExecuteNonQuery();
-
- cmd.Parameters[0].Value = 20;
- cmd.ExecuteNonQuery();
- }
-
-
-
- Public Sub InsertRow(myConnectionString As String)
- ' If the connection string is null, use a default.
- If myConnectionString = "" Then
- myConnectionString = "Database=Test;Data Source=localhost;User Id=username;Password=pass"
- End If
- Dim myConnection As New MySqlConnection(myConnectionString)
- Dim myInsertQuery As String = "INSERT INTO Orders (id, customerId, amount) Values(1001, 23, 30.66)"
- Dim myCommand As New MySqlCommand(myInsertQuery)
- myCommand.Connection = myConnection
- myConnection.Open()
- myCommand.ExecuteNonQuery()
- myCommand.Connection.Close()
- End Sub
-
-
-
-
- public void InsertRow(string myConnectionString)
- {
- // If the connection string is null, use a default.
- if(myConnectionString == "")
- {
- myConnectionString = "Database=Test;Data Source=localhost;User Id=username;Password=pass";
- }
- MySqlConnection myConnection = new MySqlConnection(myConnectionString);
- string myInsertQuery = "INSERT INTO Orders (id, customerId, amount) Values(1001, 23, 30.66)";
- MySqlCommand myCommand = new MySqlCommand(myInsertQuery);
- myCommand.Connection = myConnection;
- myConnection.Open();
- myCommand.ExecuteNonQuery();
- myCommand.Connection.Close();
- }
-
-
-
- Public Sub CreateSqlConnection()
- Dim myConnection As New MySqlConnection()
- myConnection.ConnectionString = "Persist Security Info=False;Username=user;Password=pass;database=test1;server=localhost;Connect Timeout=30"
- myConnection.Open()
- End Sub
-
-
- public void CreateSqlConnection()
- {
- MySqlConnection myConnection = new MySqlConnection();
- myConnection.ConnectionString = "Persist Security Info=False;Username=user;Password=pass;database=test1;server=localhost;Connect Timeout=30";
- myConnection.Open();
- }
-
-
- Public Sub CreateMySqlConnection()
- Dim myConnString As String = _
- "Persist Security Info=False;database=test;server=localhost;user id=joeuser;pwd=pass"
- Dim myConnection As New MySqlConnection( myConnString )
- myConnection.Open()
- MessageBox.Show( "Server Version: " + myConnection.ServerVersion _
- + ControlChars.NewLine + "Database: " + myConnection.Database )
- myConnection.ChangeDatabase( "test2" )
- MessageBox.Show( "ServerVersion: " + myConnection.ServerVersion _
- + ControlChars.NewLine + "Database: " + myConnection.Database )
- myConnection.Close()
- End Sub
-
-
-
- public void CreateMySqlConnection()
- {
- string myConnString =
- "Persist Security Info=False;database=test;server=localhost;user id=joeuser;pwd=pass";
- MySqlConnection myConnection = new MySqlConnection( myConnString );
- myConnection.Open();
- MessageBox.Show( "Server Version: " + myConnection.ServerVersion
- + "\nDatabase: " + myConnection.Database );
- myConnection.ChangeDatabase( "test2" );
- MessageBox.Show( "ServerVersion: " + myConnection.ServerVersion
- + "\nDatabase: " + myConnection.Database );
- myConnection.Close();
- }
-
-
- Public Sub CreateMySqlConnection(myConnString As String)
- Dim myConnection As New MySqlConnection(myConnString)
- myConnection.Open()
- MessageBox.Show("ServerVersion: " + myConnection.ServerVersion _
- + ControlChars.Cr + "State: " + myConnection.State.ToString())
- myConnection.Close()
- End Sub
-
-
- public void CreateMySqlConnection(string myConnString)
- {
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- myConnection.Open();
- MessageBox.Show("ServerVersion: " + myConnection.ServerVersion +
- "\nState: " + myConnection.State.ToString());
- myConnection.Close();
- }
-
-
- Public Sub CreateMySqlConnection(myConnString As String)
- Dim myConnection As New MySqlConnection(myConnString)
- myConnection.Open()
- MessageBox.Show("ServerVersion: " + myConnection.ServerVersion _
- + ControlChars.Cr + "State: " + myConnection.State.ToString())
- myConnection.Close()
- End Sub
-
-
- public void CreateMySqlConnection(string myConnString)
- {
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- myConnection.Open();
- MessageBox.Show("ServerVersion: " + myConnection.ServerVersion +
- "\nState: " + myConnection.State.ToString());
- myConnection.Close();
- }
-
- | Name | -Default | -Description | -
|---|---|---|
|
- Connect Timeout |
- 15 | -- The length of time (in seconds) to wait for a connection to the server before - terminating the attempt and generating an error. - | -
|
- Host |
- localhost | -
- |
-
| Port | -3306 | -- The port MySQL is using to listen for connections. This value is ignored if the connection protocol - is anything but socket. - | -
| Protocol | -socket | -
- Specifies the type of connection to make to the server. - pipe for a named pipe connection - unix for a Unix socket connection - memory to use MySQL shared memory - |
-
|
- CharSet |
- - | - Specifies the character set that should be used to encode all queries sent to the server. - Resultsets are still returned in the character set of the data returned. - | -
| Logging | -false | -When true, various pieces of information is output to any configured TraceListeners. | -
| Allow Batch | -true | -
- When true, multiple SQL statements can be sent with one command execution. - -Note- - Starting with MySQL 4.1.1, batch statements should be separated by the server-defined seperator character. - Commands sent to earlier versions of MySQL should be seperated with ';'. - |
-
| Encrypt | -false | -- When true, SSL/TLS encryption is used for all data sent between the - client and server if the server has a certificate installed. Recognized values - are true, false, yes, and no. - | -
|
- Initial Catalog |
- mysql | -The name of the database to use intially | -
|
- Password |
- - | The password for the MySQL account being used. | -
| Persist Security Info | -false | -- When set to false or no (strongly recommended), security-sensitive - information, such as the password, is not returned as part of the connection if - the connection is open or has ever been in an open state. Resetting the - connection string resets all connection string values including the password. - Recognized values are true, false, yes, and no. - | -
|
- User Id |
- - | The MySQL login account being used. | -
| Shared Memory Name | -MYSQL | -The name of the shared memory object to use for communication if the connection protocol is set to memory. | -
| Allow Zero Datetime | -false | -- True to have MySqlDataReader.GetValue() return a MySqlDateTime for date or datetime columns that have illegal values. - False will cause a DateTime object to be returned for legal values and an exception will be thrown for illegal values. - | -
| Convert Zero Datetime | -false | -- True to have MySqlDataReader.GetValue() and MySqlDataReader.GetDateTime() - return DateTime.MinValue for date or datetime columns that have illegal values. - | -
|
- Pipe Name |
- mysql | -
- When set to the name of a named pipe, the MySqlConnection will attempt to connect to MySQL
- on that named pipe. This settings only applies to the Windows platform. - |
-
|
- Use Performance Monitor |
- false | -- Posts performance data that can be tracked using perfmon - | -
| - Procedure Cache Size - | -25 | -- How many stored procedure definitions can be held in the cache - | -
| - Ignore Prepare - | -true | -- Instructs the provider to ignore any attempts to prepare commands. This option - was added to allow a user to disable prepared statements in an entire application - without modifying the code. A user might want to do this if errors or bugs are - encountered with MySQL prepared statements. - | -
| Use Procedure Bodies | -true | -- Instructs the provider to attempt to call the procedure without first resolving the metadata. This - is useful in situations where the calling user does not have access to the mysql.proc table. To - use this mode, the parameters for the procedure must be added to the command in the same order - as they appear in the procedure definition and their types must be explicitly set. - | -
| Auto Enlist | -true | -- Indicates whether the connection should automatically enlist in the current transaction, - if there is one. - | -
| Respect Binary Flags | -true | -- Indicates whether the connection should respect all binary flags sent to the client - as part of column metadata. False will cause the connector to behave like - Connector/NET 5.0 and earlier. - | -
| BlobAsUTF8IncludePattern | -null | -- Pattern that should be used to indicate which blob columns should be treated as UTF-8. - | -
| BlobAsUTF8ExcludePattern | -null | -- Pattern that should be used to indicate which blob columns should not be treated as UTF-8. - | -
| Default Command Timeout | -30 | -- The default timeout that new MySqlCommand objects will use unless changed. - | -
| Allow User Variables | -false | -- Should the provider expect user variables in the SQL. - | -
| Interactive -or- Interactive Session | -false | -- Should this session be considered interactive? - | -
| Functions Return String | -false | -- Set this option to true to force the return value of SQL functions to be string. - | -
| Use Affected Rows | -false | -- Set this option to true to cause the affected rows reported to reflect only the - rows that are actually changed. By default, the number of rows that are matched - is returned. - | -
| Name | -Default | -Description | -
|---|---|---|
| Connection Lifetime | -0 | -
- When a connection is returned to the pool, its creation time is compared with
- the current time, and the connection is destroyed if that time span (in seconds)
- exceeds the value specified by Connection Lifetime. This is useful in
- clustered configurations to force load balancing between a running server and a
- server just brought online.
- |
-
| Max Pool Size | -100 | -The maximum number of connections allowed in the pool. | -
| Min Pool Size | -0 | -The minimum number of connections allowed in the pool. | -
| Pooling | -true | -- When true, the MySqlConnection object is drawn from the appropriate - pool, or if necessary, is created and added to the appropriate pool. Recognized - values are true, false, yes, and no. - | -
| Connection Reset | -false | -- Specifies whether the database connection should be reset when being - drawn from the pool. Leaving this as false will yeild much faster - connection opens but the user should understand the side effects - of doing this such as temporary tables and user variables from the previous - session not being cleared out. - | -
| Cache Server Properties | -false | -- Specifies whether the server variables are cached between pooled connections. - On systems where the variables change infrequently and there are lots of - connection attempts, this can speed up things dramatically. - | -
- Public Sub CreateConnection()
- Dim myConnection As New MySqlConnection()
- myConnection.ConnectionString = "Persist Security Info=False;database=myDB;server=myHost;Connect Timeout=30;user id=myUser; pwd=myPass"
- myConnection.Open()
- End Sub 'CreateConnection
-
-
- public void CreateConnection()
- {
- MySqlConnection myConnection = new MySqlConnection();
- myConnection.ConnectionString = "Persist Security Info=False;database=myDB;server=myHost;Connect Timeout=30;user id=myUser; pwd=myPass";
- myConnection.Open();
- }
-
-
- Public Sub CreateConnection()
- Dim myConnection As New MySqlConnection()
- myConnection.ConnectionString = "database=myDB;server=/var/lib/mysql/mysql.sock;user id=myUser; pwd=myPass"
- myConnection.Open()
- End Sub 'CreateConnection
-
-
- public void CreateConnection()
- {
- MySqlConnection myConnection = new MySqlConnection();
- myConnection.ConnectionString = "database=myDB;server=/var/lib/mysql/mysql.sock;user id=myUser; pwd=myPass";
- myConnection.Open();
- }
-
-
- Public Sub RunTransaction(myConnString As String)
- Dim myConnection As New MySqlConnection(myConnString)
- myConnection.Open()
-
- Dim myCommand As MySqlCommand = myConnection.CreateCommand()
- Dim myTrans As MySqlTransaction
-
- ' Start a local transaction
- myTrans = myConnection.BeginTransaction()
- ' Must assign both transaction object and connection
- ' to Command object for a pending local transaction
- myCommand.Connection = myConnection
- myCommand.Transaction = myTrans
-
- Try
- myCommand.CommandText = "Insert into Test (id, desc) VALUES (100, 'Description')"
- myCommand.ExecuteNonQuery()
- myCommand.CommandText = "Insert into Test (id, desc) VALUES (101, 'Description')"
- myCommand.ExecuteNonQuery()
- myTrans.Commit()
- Console.WriteLine("Both records are written to database.")
- Catch e As Exception
- Try
- myTrans.Rollback()
- Catch ex As MySqlException
- If Not myTrans.Connection Is Nothing Then
- Console.WriteLine("An exception of type " + ex.GetType().ToString() + _
- " was encountered while attempting to roll back the transaction.")
- End If
- End Try
-
- Console.WriteLine("An exception of type " + e.GetType().ToString() + _
- "was encountered while inserting the data.")
- Console.WriteLine("Neither record was written to database.")
- Finally
- myConnection.Close()
- End Try
- End Sub
-
-
- public void RunTransaction(string myConnString)
- {
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- myConnection.Open();
-
- MySqlCommand myCommand = myConnection.CreateCommand();
- MySqlTransaction myTrans;
-
- // Start a local transaction
- myTrans = myConnection.BeginTransaction();
- // Must assign both transaction object and connection
- // to Command object for a pending local transaction
- myCommand.Connection = myConnection;
- myCommand.Transaction = myTrans;
-
- try
- {
- myCommand.CommandText = "insert into Test (id, desc) VALUES (100, 'Description')";
- myCommand.ExecuteNonQuery();
- myCommand.CommandText = "insert into Test (id, desc) VALUES (101, 'Description')";
- myCommand.ExecuteNonQuery();
- myTrans.Commit();
- Console.WriteLine("Both records are written to database.");
- }
- catch(Exception e)
- {
- try
- {
- myTrans.Rollback();
- }
- catch (SqlException ex)
- {
- if (myTrans.Connection != null)
- {
- Console.WriteLine("An exception of type " + ex.GetType() +
- " was encountered while attempting to roll back the transaction.");
- }
- }
-
- Console.WriteLine("An exception of type " + e.GetType() +
- " was encountered while inserting the data.");
- Console.WriteLine("Neither record was written to database.");
- }
- finally
- {
- myConnection.Close();
- }
- }
-
-
- Public Sub RunTransaction(myConnString As String)
- Dim myConnection As New MySqlConnection(myConnString)
- myConnection.Open()
-
- Dim myCommand As MySqlCommand = myConnection.CreateCommand()
- Dim myTrans As MySqlTransaction
-
- ' Start a local transaction
- myTrans = myConnection.BeginTransaction()
- ' Must assign both transaction object and connection
- ' to Command object for a pending local transaction
- myCommand.Connection = myConnection
- myCommand.Transaction = myTrans
-
- Try
- myCommand.CommandText = "Insert into Test (id, desc) VALUES (100, 'Description')"
- myCommand.ExecuteNonQuery()
- myCommand.CommandText = "Insert into Test (id, desc) VALUES (101, 'Description')"
- myCommand.ExecuteNonQuery()
- myTrans.Commit()
- Console.WriteLine("Both records are written to database.")
- Catch e As Exception
- Try
- myTrans.Rollback()
- Catch ex As MySqlException
- If Not myTrans.Connection Is Nothing Then
- Console.WriteLine("An exception of type " + ex.GetType().ToString() + _
- " was encountered while attempting to roll back the transaction.")
- End If
- End Try
-
- Console.WriteLine("An exception of type " + e.GetType().ToString() + _
- "was encountered while inserting the data.")
- Console.WriteLine("Neither record was written to database.")
- Finally
- myConnection.Close()
- End Try
- End Sub
-
-
- public void RunTransaction(string myConnString)
- {
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- myConnection.Open();
-
- MySqlCommand myCommand = myConnection.CreateCommand();
- MySqlTransaction myTrans;
-
- // Start a local transaction
- myTrans = myConnection.BeginTransaction();
- // Must assign both transaction object and connection
- // to Command object for a pending local transaction
- myCommand.Connection = myConnection;
- myCommand.Transaction = myTrans;
-
- try
- {
- myCommand.CommandText = "insert into Test (id, desc) VALUES (100, 'Description')";
- myCommand.ExecuteNonQuery();
- myCommand.CommandText = "insert into Test (id, desc) VALUES (101, 'Description')";
- myCommand.ExecuteNonQuery();
- myTrans.Commit();
- Console.WriteLine("Both records are written to database.");
- }
- catch(Exception e)
- {
- try
- {
- myTrans.Rollback();
- }
- catch (SqlException ex)
- {
- if (myTrans.Connection != null)
- {
- Console.WriteLine("An exception of type " + ex.GetType() +
- " was encountered while attempting to roll back the transaction.");
- }
- }
-
- Console.WriteLine("An exception of type " + e.GetType() +
- " was encountered while inserting the data.");
- Console.WriteLine("Neither record was written to database.");
- }
- finally
- {
- myConnection.Close();
- }
- }
-
-
- Public Sub CreateMySqlConnection()
- Dim myConnString As String = _
- "Persist Security Info=False;database=test;server=localhost;user id=joeuser;pwd=pass"
- Dim myConnection As New MySqlConnection( myConnString )
- myConnection.Open()
- MessageBox.Show( "Server Version: " + myConnection.ServerVersion _
- + ControlChars.NewLine + "Database: " + myConnection.Database )
- myConnection.ChangeDatabase( "test2" )
- MessageBox.Show( "ServerVersion: " + myConnection.ServerVersion _
- + ControlChars.NewLine + "Database: " + myConnection.Database )
- myConnection.Close()
- End Sub
-
-
-
- public void CreateMySqlConnection()
- {
- string myConnString =
- "Persist Security Info=False;database=test;server=localhost;user id=joeuser;pwd=pass";
- MySqlConnection myConnection = new MySqlConnection( myConnString );
- myConnection.Open();
- MessageBox.Show( "Server Version: " + myConnection.ServerVersion
- + "\nDatabase: " + myConnection.Database );
- myConnection.ChangeDatabase( "test2" );
- MessageBox.Show( "ServerVersion: " + myConnection.ServerVersion
- + "\nDatabase: " + myConnection.Database );
- myConnection.Close();
- }
-
-
- Public Sub CreateMySqlConnection(myConnString As String)
- Dim myConnection As New MySqlConnection(myConnString)
- myConnection.Open()
- MessageBox.Show("ServerVersion: " + myConnection.ServerVersion _
- + ControlChars.Cr + "State: " + myConnection.State.ToString())
- myConnection.Close()
- End Sub
-
-
- public void CreateMySqlConnection(string myConnString)
- {
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- myConnection.Open();
- MessageBox.Show("ServerVersion: " + myConnection.ServerVersion +
- "\nState: " + myConnection.State.ToString());
- myConnection.Close();
- }
-
-
- Public Sub CreateMySqlConnection(myConnString As String)
- Dim myConnection As New MySqlConnection(myConnString)
- myConnection.Open()
- MessageBox.Show("ServerVersion: " + myConnection.ServerVersion _
- + ControlChars.Cr + "State: " + myConnection.State.ToString())
- myConnection.Close()
- End Sub
-
-
- public void CreateMySqlConnection(string myConnString)
- {
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- myConnection.Open();
- MessageBox.Show("ServerVersion: " + myConnection.ServerVersion +
- "\nState: " + myConnection.State.ToString());
- myConnection.Close();
- }
-
-
- Public Sub ReadMyData(myConnString As String)
- Dim mySelectQuery As String = "SELECT OrderID, CustomerID FROM Orders"
- Dim myConnection As New MySqlConnection(myConnString)
- Dim myCommand As New MySqlCommand(mySelectQuery, myConnection)
- myConnection.Open()
- Dim myReader As MySqlDataReader
- myReader = myCommand.ExecuteReader()
- ' Always call Read before accessing data.
- While myReader.Read()
- Console.WriteLine((myReader.GetInt32(0) & ", " & myReader.GetString(1)))
- End While
- ' always call Close when done reading.
- myReader.Close()
- ' Close the connection when done with it.
- myConnection.Close()
- End Sub 'ReadMyData
-
-
- public void ReadMyData(string myConnString) {
- string mySelectQuery = "SELECT OrderID, CustomerID FROM Orders";
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- MySqlCommand myCommand = new MySqlCommand(mySelectQuery,myConnection);
- myConnection.Open();
- MySqlDataReader myReader;
- myReader = myCommand.ExecuteReader();
- // Always call Read before accessing data.
- while (myReader.Read()) {
- Console.WriteLine(myReader.GetInt32(0) + ", " + myReader.GetString(1));
- }
- // always call Close when done reading.
- myReader.Close();
- // Close the connection when done with it.
- myConnection.Close();
- }
-
-
- Public Sub ShowException()
- Dim mySelectQuery As String = "SELECT column1 FROM table1"
- Dim myConnection As New MySqlConnection ("Data Source=localhost;Database=Sample;")
- Dim myCommand As New MySqlCommand(mySelectQuery, myConnection)
-
- Try
- myCommand.Connection.Open()
- Catch e As MySqlException
- MessageBox.Show( e.Message )
- End Try
- End Sub
-
-
- public void ShowException()
- {
- string mySelectQuery = "SELECT column1 FROM table1";
- MySqlConnection myConnection =
- new MySqlConnection("Data Source=localhost;Database=Sample;");
- MySqlCommand myCommand = new MySqlCommand(mySelectQuery,myConnection);
-
- try
- {
- myCommand.Connection.Open();
- }
- catch (MySqlException e)
- {
- MessageBox.Show( e.Message );
- }
- }
-
-
- Public Shared Function SelectRows(myConnection As String, mySelectQuery As String, myTableName As String) As DataSet
- Dim myConn As New MySqlConnection(myConnection)
- Dim myDataAdapter As New MySqlDataAdapter()
- myDataAdapter.SelectCommand = New MySqlCommand(mySelectQuery, myConn)
- Dim cb As SqlCommandBuilder = New MySqlCommandBuilder(myDataAdapter)
-
- myConn.Open()
-
- Dim ds As DataSet = New DataSet
- myDataAdapter.Fill(ds, myTableName)
-
- ' Code to modify data in DataSet here
-
- ' Without the MySqlCommandBuilder this line would fail.
- myDataAdapter.Update(ds, myTableName)
-
- myConn.Close()
- End Function 'SelectRows
-
-
- public static DataSet SelectRows(string myConnection, string mySelectQuery, string myTableName)
- {
- MySqlConnection myConn = new MySqlConnection(myConnection);
- MySqlDataAdapter myDataAdapter = new MySqlDataAdapter();
- myDataAdapter.SelectCommand = new MySqlCommand(mySelectQuery, myConn);
- MySqlCommandBuilder cb = new MySqlCommandBuilder(myDataAdapter);
-
- myConn.Open();
-
- DataSet ds = new DataSet();
- myDataAdapter.Fill(ds, myTableName);
-
- //code to modify data in DataSet here
-
- //Without the MySqlCommandBuilder this line would fail
- myDataAdapter.Update(ds, myTableName);
-
- myConn.Close();
-
- return ds;
- }
-
-
-
- Public Function SelectRows(dataSet As DataSet, connection As String, query As String) As DataSet
- Dim conn As New MySqlConnection(connection)
- Dim adapter As New MySqlDataAdapter()
- adapter.SelectCommand = new MySqlCommand(query, conn)
- adapter.Fill(dataset)
- Return dataset
- End Function
-
-
- public DataSet SelectRows(DataSet dataset,string connection,string query)
- {
- MySqlConnection conn = new MySqlConnection(connection);
- MySqlDataAdapter adapter = new MySqlDataAdapter();
- adapter.SelectCommand = new MySqlCommand(query, conn);
- adapter.Fill(dataset);
- return dataset;
- }
-
-
- Public Sub CreateSqlDataAdapter()
- Dim conn As MySqlConnection = New MySqlConnection("Data Source=localhost;" & _
- "database=test")
- Dim da As MySqlDataAdapter = New MySqlDataAdapter
- da.MissingSchemaAction = MissingSchemaAction.AddWithKey
-
- da.SelectCommand = New MySqlCommand("SELECT id, name FROM mytable", conn)
- da.InsertCommand = New MySqlCommand("INSERT INTO mytable (id, name) " & _
- "VALUES (@id, @name)", conn)
- da.UpdateCommand = New MySqlCommand("UPDATE mytable SET id=@id, name=@name " & _
- "WHERE id=@oldId", conn)
- da.DeleteCommand = New MySqlCommand("DELETE FROM mytable WHERE id=@id", conn)
-
- da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
- da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
-
- da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
- da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
- da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
-
- da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
- End Sub
-
-
- public static void CreateSqlDataAdapter()
- {
- MySqlConnection conn = new MySqlConnection("Data Source=localhost;database=test");
- MySqlDataAdapter da = new MySqlDataAdapter();
- da.MissingSchemaAction = MissingSchemaAction.AddWithKey;
-
- da.SelectCommand = new MySqlCommand("SELECT id, name FROM mytable", conn);
- da.InsertCommand = new MySqlCommand("INSERT INTO mytable (id, name) " +
- "VALUES (@id, @name)", conn);
- da.UpdateCommand = new MySqlCommand("UPDATE mytable SET id=@id, name=@name " +
- "WHERE id=@oldId", conn);
- da.DeleteCommand = new MySqlCommand("DELETE FROM mytable WHERE id=@id", conn);
-
- da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
- da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
-
- da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
- da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
- da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
-
- da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
- }
-
-
- Public Sub CreateSqlDataAdapter()
- Dim conn As MySqlConnection = New MySqlConnection("Data Source=localhost;" & _
- "database=test")
- Dim cmd as new MySqlCommand("SELECT id, name FROM mytable", conn)
- Dim da As MySqlDataAdapter = New MySqlDataAdapter(cmd)
- da.MissingSchemaAction = MissingSchemaAction.AddWithKey
-
- da.InsertCommand = New MySqlCommand("INSERT INTO mytable (id, name) " & _
- "VALUES (@id, @name)", conn)
- da.UpdateCommand = New MySqlCommand("UPDATE mytable SET id=@id, name=@name " & _
- "WHERE id=@oldId", conn)
- da.DeleteCommand = New MySqlCommand("DELETE FROM mytable WHERE id=@id", conn)
-
- da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
- da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
-
- da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
- da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
- da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
-
- da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
- End Sub
-
-
- public static void CreateSqlDataAdapter()
- {
- MySqlConnection conn = new MySqlConnection("Data Source=localhost;database=test");
- MySqlCommand cmd = new MySqlCommand("SELECT id, name FROM mytable", conn);
- MySqlDataAdapter da = new MySqlDataAdapter(cmd);
- da.MissingSchemaAction = MissingSchemaAction.AddWithKey;
-
- da.InsertCommand = new MySqlCommand("INSERT INTO mytable (id, name) " +
- "VALUES (@id, @name)", conn);
- da.UpdateCommand = new MySqlCommand("UPDATE mytable SET id=@id, name=@name " +
- "WHERE id=@oldId", conn);
- da.DeleteCommand = new MySqlCommand("DELETE FROM mytable WHERE id=@id", conn);
-
- da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
- da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
-
- da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
- da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
- da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
-
- da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
- }
-
-
- Public Sub CreateSqlDataAdapter()
- Dim conn As MySqlConnection = New MySqlConnection("Data Source=localhost;" & _
- "database=test")
- Dim da As MySqlDataAdapter = New MySqlDataAdapter("SELECT id, name FROM mytable", conn)
- da.MissingSchemaAction = MissingSchemaAction.AddWithKey
-
- da.InsertCommand = New MySqlCommand("INSERT INTO mytable (id, name) " & _
- "VALUES (@id, @name)", conn)
- da.UpdateCommand = New MySqlCommand("UPDATE mytable SET id=@id, name=@name " & _
- "WHERE id=@oldId", conn)
- da.DeleteCommand = New MySqlCommand("DELETE FROM mytable WHERE id=@id", conn)
-
- da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
- da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
-
- da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
- da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
- da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
-
- da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
- End Sub
-
-
- public static void CreateSqlDataAdapter()
- {
- MySqlConnection conn = new MySqlConnection("Data Source=localhost;database=test");
- MySqlDataAdapter da = new MySqlDataAdapter("SELECT id, name FROM mytable", conn);
- da.MissingSchemaAction = MissingSchemaAction.AddWithKey;
-
- da.InsertCommand = new MySqlCommand("INSERT INTO mytable (id, name) " +
- "VALUES (@id, @name)", conn);
- da.UpdateCommand = new MySqlCommand("UPDATE mytable SET id=@id, name=@name " +
- "WHERE id=@oldId", conn);
- da.DeleteCommand = new MySqlCommand("DELETE FROM mytable WHERE id=@id", conn);
-
- da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
- da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
-
- da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
- da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
- da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
-
- da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
- }
-
-
- Public Sub CreateSqlDataAdapter()
- Dim da As MySqlDataAdapter = New MySqlDataAdapter("SELECT id, name FROM mytable", "Data Source=localhost;database=test")
- Dim conn As MySqlConnection = da.SelectCommand.Connection
- da.MissingSchemaAction = MissingSchemaAction.AddWithKey
-
- da.InsertCommand = New MySqlCommand("INSERT INTO mytable (id, name) " & _
- "VALUES (@id, @name)", conn)
- da.UpdateCommand = New MySqlCommand("UPDATE mytable SET id=@id, name=@name " & _
- "WHERE id=@oldId", conn)
- da.DeleteCommand = New MySqlCommand("DELETE FROM mytable WHERE id=@id", conn)
-
- da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
- da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
-
- da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
- da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
- da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
-
- da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
- End Sub
-
-
- public static void CreateSqlDataAdapter()
- {
- MySqlDataAdapter da = new MySqlDataAdapter("SELECT id, name FROM mytable", "Data Source=localhost;database=test");
- MySqlConnection conn = da.SelectCommand.Connection;
- da.MissingSchemaAction = MissingSchemaAction.AddWithKey;
-
- da.InsertCommand = new MySqlCommand("INSERT INTO mytable (id, name) " +
- "VALUES (@id, @name)", conn);
- da.UpdateCommand = new MySqlCommand("UPDATE mytable SET id=@id, name=@name " +
- "WHERE id=@oldId", conn);
- da.DeleteCommand = new MySqlCommand("DELETE FROM mytable WHERE id=@id", conn);
-
- da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
- da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
-
- da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
- da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
- da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
-
- da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
- }
-
-
- Public Shared Function CreateCustomerAdapter(conn As MySqlConnection) As MySqlDataAdapter
-
- Dim da As MySqlDataAdapter = New MySqlDataAdapter()
- Dim cmd As MySqlCommand
- Dim parm As MySqlParameter
-
- ' Create the SelectCommand.
- cmd = New MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn)
-
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15)
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15)
-
- da.SelectCommand = cmd
-
- ' Create the DeleteCommand.
- cmd = New MySqlCommand("DELETE FROM mytable WHERE id=@id", conn)
-
- parm = cmd.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
- parm.SourceVersion = DataRowVersion.Original
-
- da.DeleteCommand = cmd
-
- Return da
- End Function
-
-
- public static MySqlDataAdapter CreateCustomerAdapter(MySqlConnection conn)
- {
- MySqlDataAdapter da = new MySqlDataAdapter();
- MySqlCommand cmd;
- MySqlParameter parm;
-
- // Create the SelectCommand.
- cmd = new MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn);
-
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15);
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15);
-
- da.SelectCommand = cmd;
-
- // Create the DeleteCommand.
- cmd = new MySqlCommand("DELETE FROM mytable WHERE id=@id", conn);
-
- parm = cmd.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
- parm.SourceVersion = DataRowVersion.Original;
-
- da.DeleteCommand = cmd;
-
- return da;
- }
-
-
- Public Shared Function CreateCustomerAdapter(conn As MySqlConnection) As MySqlDataAdapter
-
- Dim da As MySqlDataAdapter = New MySqlDataAdapter()
- Dim cmd As MySqlCommand
- Dim parm As MySqlParameter
-
- ' Create the SelectCommand.
- cmd = New MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn)
-
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15)
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15)
-
- da.SelectCommand = cmd
-
- ' Create the InsertCommand.
- cmd = New MySqlCommand("INSERT INTO mytable (id,name) VALUES (@id, @name)", conn)
-
- cmd.Parameters.Add( "@id", MySqlDbType.VarChar, 15, "id" )
- cmd.Parameters.Add( "@name", MySqlDbType.VarChar, 15, "name" )
- da.InsertCommand = cmd
-
- Return da
- End Function
-
-
- public static MySqlDataAdapter CreateCustomerAdapter(MySqlConnection conn)
- {
- MySqlDataAdapter da = new MySqlDataAdapter();
- MySqlCommand cmd;
- MySqlParameter parm;
-
- // Create the SelectCommand.
- cmd = new MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn);
-
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15);
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15);
-
- da.SelectCommand = cmd;
-
- // Create the InsertCommand.
- cmd = new MySqlCommand("INSERT INTO mytable (id,name) VALUES (@id,@name)", conn);
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15, "id" );
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15, "name" );
-
- da.InsertCommand = cmd;
-
- return da;
- }
-
-
- Public Shared Function CreateCustomerAdapter(conn As MySqlConnection) As MySqlDataAdapter
-
- Dim da As MySqlDataAdapter = New MySqlDataAdapter()
- Dim cmd As MySqlCommand
- Dim parm As MySqlParameter
-
- ' Create the SelectCommand.
- cmd = New MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn)
-
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15)
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15)
-
- da.SelectCommand = cmd
-
- ' Create the InsertCommand.
- cmd = New MySqlCommand("INSERT INTO mytable (id,name) VALUES (@id, @name)", conn)
-
- cmd.Parameters.Add( "@id", MySqlDbType.VarChar, 15, "id" )
- cmd.Parameters.Add( "@name", MySqlDbType.VarChar, 15, "name" )
- da.InsertCommand = cmd
-
- Return da
- End Function
-
-
- public static MySqlDataAdapter CreateCustomerAdapter(MySqlConnection conn)
- {
- MySqlDataAdapter da = new MySqlDataAdapter();
- MySqlCommand cmd;
- MySqlParameter parm;
-
- // Create the SelectCommand.
- cmd = new MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn);
-
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15);
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15);
-
- da.SelectCommand = cmd;
-
- // Create the InsertCommand.
- cmd = new MySqlCommand("INSERT INTO mytable (id,name) VALUES (@id,@name)", conn);
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15, "id" );
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15, "name" );
-
- da.InsertCommand = cmd;
-
- return da;
- }
-
-
- Public Shared Function CreateCustomerAdapter(conn As MySqlConnection) As MySqlDataAdapter
-
- Dim da As MySqlDataAdapter = New MySqlDataAdapter()
- Dim cmd As MySqlCommand
- Dim parm As MySqlParameter
-
- ' Create the SelectCommand.
- cmd = New MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn)
-
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15)
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15)
-
- da.SelectCommand = cmd
-
- ' Create the UpdateCommand.
- cmd = New MySqlCommand("UPDATE mytable SET id=@id, name=@name WHERE id=@oldId", conn)
-
- cmd.Parameters.Add( "@id", MySqlDbType.VarChar, 15, "id" )
- cmd.Parameters.Add( "@name", MySqlDbType.VarChar, 15, "name" )
-
- parm = cmd.Parameters.Add("@oldId", MySqlDbType.VarChar, 15, "id")
- parm.SourceVersion = DataRowVersion.Original
-
- da.UpdateCommand = cmd
-
- Return da
- End Function
-
-
- public static MySqlDataAdapter CreateCustomerAdapter(MySqlConnection conn)
- {
- MySqlDataAdapter da = new MySqlDataAdapter();
- MySqlCommand cmd;
- MySqlParameter parm;
-
- // Create the SelectCommand.
- cmd = new MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn);
-
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15);
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15);
-
- da.SelectCommand = cmd;
-
- // Create the UpdateCommand.
- cmd = new MySqlCommand("UPDATE mytable SET id=@id, name=@name WHERE id=@oldId", conn);
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15, "id" );
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15, "name" );
-
- parm = cmd.Parameters.Add( "@oldId", MySqlDbType.VarChar, 15, "id" );
- parm.SourceVersion = DataRowVersion.Original;
-
- da.UpdateCommand = cmd;
-
- return da;
- }
-
-
- Public Sub AddParameters()
- ' ...
- ' create myDataSet and myDataAdapter
- ' ...
- myDataAdapter.SelectCommand.Parameters.Add("@CategoryName", MySqlDbType.VarChar, 80).Value = "toasters"
- myDataAdapter.SelectCommand.Parameters.Add("@SerialNum", MySqlDbType.Long).Value = 239
-
- myDataAdapter.Fill(myDataSet)
- End Sub 'AddSqlParameters
-
-
- public void AddSqlParameters()
- {
- // ...
- // create myDataSet and myDataAdapter
- // ...
-
- myDataAdapter.SelectCommand.Parameters.Add("@CategoryName", MySqlDbType.VarChar, 80).Value = "toasters";
- myDataAdapter.SelectCommand.Parameters.Add("@SerialNum", MySqlDbType.Long).Value = 239;
- myDataAdapter.Fill(myDataSet);
-
- }
-
-
- Public Sub RunTransaction(myConnString As String)
- Dim myConnection As New MySqlConnection(myConnString)
- myConnection.Open()
-
- Dim myCommand As MySqlCommand = myConnection.CreateCommand()
- Dim myTrans As MySqlTransaction
-
- ' Start a local transaction
- myTrans = myConnection.BeginTransaction()
- ' Must assign both transaction object and connection
- ' to Command object for a pending local transaction
- myCommand.Connection = myConnection
- myCommand.Transaction = myTrans
-
- Try
- myCommand.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')"
- myCommand.ExecuteNonQuery()
- myCommand.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')"
- myCommand.ExecuteNonQuery()
- myTrans.Commit()
- Console.WriteLine("Both records are written to database.")
- Catch e As Exception
- Try
- myTrans.Rollback()
- Catch ex As MySqlException
- If Not myTrans.Connection Is Nothing Then
- Console.WriteLine("An exception of type " & ex.GetType().ToString() & _
- " was encountered while attempting to roll back the transaction.")
- End If
- End Try
-
- Console.WriteLine("An exception of type " & e.GetType().ToString() & _
- "was encountered while inserting the data.")
- Console.WriteLine("Neither record was written to database.")
- Finally
- myConnection.Close()
- End Try
- End Sub 'RunTransaction
-
-
- public void RunTransaction(string myConnString)
- {
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- myConnection.Open();
-
- MySqlCommand myCommand = myConnection.CreateCommand();
- MySqlTransaction myTrans;
-
- // Start a local transaction
- myTrans = myConnection.BeginTransaction();
- // Must assign both transaction object and connection
- // to Command object for a pending local transaction
- myCommand.Connection = myConnection;
- myCommand.Transaction = myTrans;
-
- try
- {
- myCommand.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')";
- myCommand.ExecuteNonQuery();
- myCommand.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')";
- myCommand.ExecuteNonQuery();
- myTrans.Commit();
- Console.WriteLine("Both records are written to database.");
- }
- catch(Exception e)
- {
- try
- {
- myTrans.Rollback();
- }
- catch (MySqlException ex)
- {
- if (myTrans.Connection != null)
- {
- Console.WriteLine("An exception of type " + ex.GetType() +
- " was encountered while attempting to roll back the transaction.");
- }
- }
-
- Console.WriteLine("An exception of type " + e.GetType() +
- " was encountered while inserting the data.");
- Console.WriteLine("Neither record was written to database.");
- }
- finally
- {
- myConnection.Close();
- }
- }
-
-
- Public Sub RunSqlTransaction(myConnString As String)
- Dim myConnection As New MySqlConnection(myConnString)
- myConnection.Open()
-
- Dim myCommand As MySqlCommand = myConnection.CreateCommand()
- Dim myTrans As MySqlTransaction
-
- ' Start a local transaction
- myTrans = myConnection.BeginTransaction()
-
- ' Must assign both transaction object and connection
- ' to Command object for a pending local transaction
- myCommand.Connection = myConnection
- myCommand.Transaction = myTrans
-
- Try
- myCommand.CommandText = "Insert into mytable (id, desc) VALUES (100, 'Description')"
- myCommand.ExecuteNonQuery()
- myCommand.CommandText = "Insert into mytable (id, desc) VALUES (101, 'Description')"
- myCommand.ExecuteNonQuery()
- myTrans.Commit()
- Console.WriteLine("Success.")
- Catch e As Exception
- Try
- myTrans.Rollback()
- Catch ex As MySqlException
- If Not myTrans.Connection Is Nothing Then
- Console.WriteLine("An exception of type " & ex.GetType().ToString() & _
- " was encountered while attempting to roll back the transaction.")
- End If
- End Try
-
- Console.WriteLine("An exception of type " & e.GetType().ToString() & _
- "was encountered while inserting the data.")
- Console.WriteLine("Neither record was written to database.")
- Finally
- myConnection.Close()
- End Try
- End Sub
-
-
- public void RunSqlTransaction(string myConnString)
- {
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- myConnection.Open();
-
- MySqlCommand myCommand = myConnection.CreateCommand();
- MySqlTransaction myTrans;
-
- // Start a local transaction
- myTrans = myConnection.BeginTransaction();
- // Must assign both transaction object and connection
- // to Command object for a pending local transaction
- myCommand.Connection = myConnection;
- myCommand.Transaction = myTrans;
-
- try
- {
- myCommand.CommandText = "Insert into mytable (id, desc) VALUES (100, 'Description')";
- myCommand.ExecuteNonQuery();
- myCommand.CommandText = "Insert into mytable (id, desc) VALUES (101, 'Description')";
- myCommand.ExecuteNonQuery();
- myTrans.Commit();
- Console.WriteLine("Both records are written to database.");
- }
- catch(Exception e)
- {
- try
- {
- myTrans.Rollback();
- }
- catch (MySqlException ex)
- {
- if (myTrans.Connection != null)
- {
- Console.WriteLine("An exception of type " + ex.GetType() +
- " was encountered while attempting to roll back the transaction.");
- }
- }
-
- Console.WriteLine("An exception of type " + e.GetType() +
- " was encountered while inserting the data.");
- Console.WriteLine("Neither record was written to database.");
- }
- finally
- {
- myConnection.Close();
- }
- }
-
-
- Public Sub RunSqlTransaction(myConnString As String)
- Dim myConnection As New MySqlConnection(myConnString)
- myConnection.Open()
-
- Dim myCommand As MySqlCommand = myConnection.CreateCommand()
- Dim myTrans As MySqlTransaction
-
- ' Start a local transaction
- myTrans = myConnection.BeginTransaction()
-
- ' Must assign both transaction object and connection
- ' to Command object for a pending local transaction
- myCommand.Connection = myConnection
- myCommand.Transaction = myTrans
-
- Try
- myCommand.CommandText = "Insert into mytable (id, desc) VALUES (100, 'Description')"
- myCommand.ExecuteNonQuery()
- myCommand.CommandText = "Insert into mytable (id, desc) VALUES (101, 'Description')"
- myCommand.ExecuteNonQuery()
- myTrans.Commit()
- Console.WriteLine("Success.")
- Catch e As Exception
- Try
- myTrans.Rollback()
- Catch ex As MySqlException
- If Not myTrans.Connection Is Nothing Then
- Console.WriteLine("An exception of type " & ex.GetType().ToString() & _
- " was encountered while attempting to roll back the transaction.")
- End If
- End Try
-
- Console.WriteLine("An exception of type " & e.GetType().ToString() & _
- "was encountered while inserting the data.")
- Console.WriteLine("Neither record was written to database.")
- Finally
- myConnection.Close()
- End Try
- End Sub
-
-
- public void RunSqlTransaction(string myConnString)
- {
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- myConnection.Open();
-
- MySqlCommand myCommand = myConnection.CreateCommand();
- MySqlTransaction myTrans;
-
- // Start a local transaction
- myTrans = myConnection.BeginTransaction();
- // Must assign both transaction object and connection
- // to Command object for a pending local transaction
- myCommand.Connection = myConnection;
- myCommand.Transaction = myTrans;
-
- try
- {
- myCommand.CommandText = "Insert into mytable (id, desc) VALUES (100, 'Description')";
- myCommand.ExecuteNonQuery();
- myCommand.CommandText = "Insert into mytable (id, desc) VALUES (101, 'Description')";
- myCommand.ExecuteNonQuery();
- myTrans.Commit();
- Console.WriteLine("Both records are written to database.");
- }
- catch(Exception e)
- {
- try
- {
- myTrans.Rollback();
- }
- catch (MySqlException ex)
- {
- if (myTrans.Connection != null)
- {
- Console.WriteLine("An exception of type " + ex.GetType() +
- " was encountered while attempting to roll back the transaction.");
- }
- }
-
- Console.WriteLine("An exception of type " + e.GetType() +
- " was encountered while inserting the data.");
- Console.WriteLine("Neither record was written to database.");
- }
- finally
- {
- myConnection.Close();
- }
- }
-
-
- new { pooling = new
- {
- enabled = true,
- maxSize = 15,
- maxIdleTime = 60000,
- queueTimeout = 60000
- }
- }
-
-
- new { pooling = new
- {
- enabled = true,
- maxSize = 15,
- maxIdleTime = 60000,
- queueTimeout = 60000
- }
- }
-
- byte) but nor does it guarantee
- that all operations will work in such cases.
-
- [root] -+- foo -+- bar
- | |
- | +- baz
- |
- +- bar --- baz
-
-
-
- This delegates most behavior to the
-
- Most applications will never need to create their own instances of this type;
- instead, use the static
- Public Sub InsertRow(myConnectionString As String)
- " If the connection string is null, use a default.
- If myConnectionString = "" Then
- myConnectionString = "Database=Test;Data Source=localhost;User Id=username;Password=pass"
- End If
- Dim myConnection As New MySqlConnection(myConnectionString)
- Dim myInsertQuery As String = "INSERT INTO Orders (id, customerId, amount) Values(1001, 23, 30.66)"
- Dim myCommand As New MySqlCommand(myInsertQuery)
- myCommand.Connection = myConnection
- myConnection.Open()
- myCommand.ExecuteNonQuery()
- myCommand.Connection.Close()
- End Sub
-
-
- public void InsertRow(string myConnectionString)
- {
- // If the connection string is null, use a default.
- if(myConnectionString == "")
- {
- myConnectionString = "Database=Test;Data Source=localhost;User Id=username;Password=pass";
- }
- MySqlConnection myConnection = new MySqlConnection(myConnectionString);
- string myInsertQuery = "INSERT INTO Orders (id, customerId, amount) Values(1001, 23, 30.66)";
- MySqlCommand myCommand = new MySqlCommand(myInsertQuery);
- myCommand.Connection = myConnection;
- myConnection.Open();
- myCommand.ExecuteNonQuery();
- myCommand.Connection.Close();
- }
-
-
- Public Sub CreateMySqlCommand()
- Dim myConnection As New MySqlConnection _
- ("Persist Security Info=False;database=test;server=myServer")
- myConnection.Open()
- Dim myTrans As MySqlTransaction = myConnection.BeginTransaction()
- Dim mySelectQuery As String = "SELECT * FROM MyTable"
- Dim myCommand As New MySqlCommand(mySelectQuery, myConnection, myTrans)
- myCommand.CommandTimeout = 20
- End Sub
-
-
- public void CreateMySqlCommand()
- {
- MySqlConnection myConnection = new MySqlConnection("Persist Security Info=False;
- database=test;server=myServer");
- myConnection.Open();
- MySqlTransaction myTrans = myConnection.BeginTransaction();
- string mySelectQuery = "SELECT * FROM myTable";
- MySqlCommand myCommand = new MySqlCommand(mySelectQuery, myConnection,myTrans);
- myCommand.CommandTimeout = 20;
- }
-
-
- public:
- void CreateMySqlCommand()
- {
- MySqlConnection* myConnection = new MySqlConnection(S"Persist Security Info=False;
- database=test;server=myServer");
- myConnection->Open();
- MySqlTransaction* myTrans = myConnection->BeginTransaction();
- String* mySelectQuery = S"SELECT * FROM myTable";
- MySqlCommand* myCommand = new MySqlCommand(mySelectQuery, myConnection, myTrans);
- myCommand->CommandTimeout = 20;
- };
-
-
- Public Sub CreateMySqlCommand()
- Dim myCommand As New MySqlCommand()
- myCommand.CommandType = CommandType.Text
- End Sub
-
-
- public void CreateMySqlCommand()
- {
- MySqlCommand myCommand = new MySqlCommand();
- myCommand.CommandType = CommandType.Text;
- }
-
-
- Public Sub CreateMySqlCommand()
- Dim sql as String = "SELECT * FROM mytable"
- Dim myCommand As New MySqlCommand(sql)
- myCommand.CommandType = CommandType.Text
- End Sub
-
-
- public void CreateMySqlCommand()
- {
- string sql = "SELECT * FROM mytable";
- MySqlCommand myCommand = new MySqlCommand(sql);
- myCommand.CommandType = CommandType.Text;
- }
-
-
- Public Sub CreateMySqlCommand()
- Dim conn as new MySqlConnection("server=myServer")
- Dim sql as String = "SELECT * FROM mytable"
- Dim myCommand As New MySqlCommand(sql, conn)
- myCommand.CommandType = CommandType.Text
- End Sub
-
-
- public void CreateMySqlCommand()
- {
- MySqlConnection conn = new MySqlConnection("server=myserver")
- string sql = "SELECT * FROM mytable";
- MySqlCommand myCommand = new MySqlCommand(sql, conn);
- myCommand.CommandType = CommandType.Text;
- }
-
-
- Public Sub CreateMySqlCommand()
- Dim conn as new MySqlConnection("server=myServer")
- conn.Open();
- Dim txn as MySqlTransaction = conn.BeginTransaction()
- Dim sql as String = "SELECT * FROM mytable"
- Dim myCommand As New MySqlCommand(sql, conn, txn)
- myCommand.CommandType = CommandType.Text
- End Sub
-
-
- public void CreateMySqlCommand()
- {
- MySqlConnection conn = new MySqlConnection("server=myserver")
- conn.Open();
- MySqlTransaction txn = conn.BeginTransaction();
- string sql = "SELECT * FROM mytable";
- MySqlCommand myCommand = new MySqlCommand(sql, conn, txn);
- myCommand.CommandType = CommandType.Text;
- }
-
-
- Public Sub CreateMySqlCommand()
- Dim myCommand As New MySqlCommand()
- myCommand.CommandText = "SELECT * FROM Mytable ORDER BY id"
- myCommand.CommandType = CommandType.Text
- End Sub
-
-
- public void CreateMySqlCommand()
- {
- MySqlCommand myCommand = new MySqlCommand();
- myCommand.CommandText = "SELECT * FROM mytable ORDER BY id";
- myCommand.CommandType = CommandType.Text;
- }
-
-
- Public Sub CreateMySqlCommand()
- Dim myCommand As New MySqlCommand()
- myCommand.CommandType = CommandType.Text
- End Sub
-
-
- public void CreateMySqlCommand()
- {
- MySqlCommand myCommand = new MySqlCommand();
- myCommand.CommandType = CommandType.Text;
- }
-
-
- Public Sub CreateMySqlCommand()
- Dim mySelectQuery As String = "SELECT * FROM mytable ORDER BY id"
- Dim myConnectString As String = "Persist Security Info=False;database=test;server=myServer"
- Dim myCommand As New MySqlCommand(mySelectQuery)
- myCommand.Connection = New MySqlConnection(myConnectString)
- myCommand.CommandType = CommandType.Text
- End Sub
-
-
- public void CreateMySqlCommand()
- {
- string mySelectQuery = "SELECT * FROM mytable ORDER BY id";
- string myConnectString = "Persist Security Info=False;database=test;server=myServer";
- MySqlCommand myCommand = new MySqlCommand(mySelectQuery);
- myCommand.Connection = new MySqlConnection(myConnectString);
- myCommand.CommandType = CommandType.Text;
- }
-
-
- Public Sub CreateMySqlCommand(myConnection As MySqlConnection, _
- mySelectQuery As String, myParamArray() As MySqlParameter)
- Dim myCommand As New MySqlCommand(mySelectQuery, myConnection)
- myCommand.CommandText = "SELECT id, name FROM mytable WHERE age=@age"
- myCommand.UpdatedRowSource = UpdateRowSource.Both
- myCommand.Parameters.Add(myParamArray)
- Dim j As Integer
- For j = 0 To myCommand.Parameters.Count - 1
- myCommand.Parameters.Add(myParamArray(j))
- Next j
- Dim myMessage As String = ""
- Dim i As Integer
- For i = 0 To myCommand.Parameters.Count - 1
- myMessage += myCommand.Parameters(i).ToString() & ControlChars.Cr
- Next i
- Console.WriteLine(myMessage)
- End Sub
-
-
- public void CreateMySqlCommand(MySqlConnection myConnection, string mySelectQuery,
- MySqlParameter[] myParamArray)
- {
- MySqlCommand myCommand = new MySqlCommand(mySelectQuery, myConnection);
- myCommand.CommandText = "SELECT id, name FROM mytable WHERE age=@age";
- myCommand.Parameters.Add(myParamArray);
- for (int j=0; j<myParamArray.Length; j++)
- {
- myCommand.Parameters.Add(myParamArray[j]) ;
- }
- string myMessage = "";
- for (int i = 0; i < myCommand.Parameters.Count; i++)
- {
- myMessage += myCommand.Parameters[i].ToString() + "\n";
- }
- MessageBox.Show(myMessage);
- }
-
-
- Public Sub CreateMySqlCommand(myExecuteQuery As String, myConnection As MySqlConnection)
- Dim myCommand As New MySqlCommand(myExecuteQuery, myConnection)
- myCommand.Connection.Open()
- myCommand.ExecuteNonQuery()
- myConnection.Close()
- End Sub
-
-
- public void CreateMySqlCommand(string myExecuteQuery, MySqlConnection myConnection)
- {
- MySqlCommand myCommand = new MySqlCommand(myExecuteQuery, myConnection);
- myCommand.Connection.Open();
- myCommand.ExecuteNonQuery();
- myConnection.Close();
- }
-
-
- Public Sub CreateMySqlDataReader(mySelectQuery As String, myConnection As MySqlConnection)
- Dim myCommand As New MySqlCommand(mySelectQuery, myConnection)
- myConnection.Open()
- Dim myReader As MySqlDataReader
- myReader = myCommand.ExecuteReader()
- Try
- While myReader.Read()
- Console.WriteLine(myReader.GetString(0))
- End While
- Finally
- myReader.Close
- myConnection.Close
- End Try
- End Sub
-
-
- public void CreateMySqlDataReader(string mySelectQuery, MySqlConnection myConnection)
- {
- MySqlCommand myCommand = new MySqlCommand(mySelectQuery, myConnection);
- myConnection.Open();
- MMySqlDataReader myReader;
- myReader = myCommand.ExecuteReader();
- try
- {
- while(myReader.Read())
- {
- Console.WriteLine(myReader.GetString(0));
- }
- }
- finally
- {
- myReader.Close();
- myConnection.Close();
- }
- }
-
-
- Public Sub CreateMySqlCommand(myScalarQuery As String, myConnection As MySqlConnection)
- Dim myCommand As New MySqlCommand(myScalarQuery, myConnection)
- myCommand.Connection.Open()
- myCommand.ExecuteScalar()
- myConnection.Close()
- End Sub
-
-
- public void CreateMySqlCommand(string myScalarQuery, MySqlConnection myConnection)
- {
- MySqlCommand myCommand = new MySqlCommand(myScalarQuery, myConnection);
- myCommand.Connection.Open();
- myCommand.ExecuteScalar();
- myConnection.Close();
- }
-
-
- public:
- void CreateMySqlCommand(String* myScalarQuery, MySqlConnection* myConnection)
- {
- MySqlCommand* myCommand = new MySqlCommand(myScalarQuery, myConnection);
- myCommand->Connection->Open();
- myCommand->ExecuteScalar();
- myConnection->Close();
- }
-
-
-
- public sub PrepareExample()
- Dim cmd as New MySqlCommand("INSERT INTO mytable VALUES (@val)", myConnection)
- cmd.Parameters.Add( "@val", 10 )
- cmd.Prepare()
- cmd.ExecuteNonQuery()
-
- cmd.Parameters(0).Value = 20
- cmd.ExecuteNonQuery()
- end sub
-
-
- private void PrepareExample()
- {
- MySqlCommand cmd = new MySqlCommand("INSERT INTO mytable VALUES (@val)", myConnection);
- cmd.Parameters.Add( "@val", 10 );
- cmd.Prepare();
- cmd.ExecuteNonQuery();
-
- cmd.Parameters[0].Value = 20;
- cmd.ExecuteNonQuery();
- }
-
-
-
- Public Sub InsertRow(myConnectionString As String)
- ' If the connection string is null, use a default.
- If myConnectionString = "" Then
- myConnectionString = "Database=Test;Data Source=localhost;User Id=username;Password=pass"
- End If
- Dim myConnection As New MySqlConnection(myConnectionString)
- Dim myInsertQuery As String = "INSERT INTO Orders (id, customerId, amount) Values(1001, 23, 30.66)"
- Dim myCommand As New MySqlCommand(myInsertQuery)
- myCommand.Connection = myConnection
- myConnection.Open()
- myCommand.ExecuteNonQuery()
- myCommand.Connection.Close()
- End Sub
-
-
-
-
- public void InsertRow(string myConnectionString)
- {
- // If the connection string is null, use a default.
- if(myConnectionString == "")
- {
- myConnectionString = "Database=Test;Data Source=localhost;User Id=username;Password=pass";
- }
- MySqlConnection myConnection = new MySqlConnection(myConnectionString);
- string myInsertQuery = "INSERT INTO Orders (id, customerId, amount) Values(1001, 23, 30.66)";
- MySqlCommand myCommand = new MySqlCommand(myInsertQuery);
- myCommand.Connection = myConnection;
- myConnection.Open();
- myCommand.ExecuteNonQuery();
- myCommand.Connection.Close();
- }
-
-
-
- Public Sub CreateSqlConnection()
- Dim myConnection As New MySqlConnection()
- myConnection.ConnectionString = "Persist Security Info=False;Username=user;Password=pass;database=test1;server=localhost;Connect Timeout=30"
- myConnection.Open()
- End Sub
-
-
- public void CreateSqlConnection()
- {
- MySqlConnection myConnection = new MySqlConnection();
- myConnection.ConnectionString = "Persist Security Info=False;Username=user;Password=pass;database=test1;server=localhost;Connect Timeout=30";
- myConnection.Open();
- }
-
-
- Public Sub CreateMySqlConnection()
- Dim myConnString As String = _
- "Persist Security Info=False;database=test;server=localhost;user id=joeuser;pwd=pass"
- Dim myConnection As New MySqlConnection( myConnString )
- myConnection.Open()
- MessageBox.Show( "Server Version: " + myConnection.ServerVersion _
- + ControlChars.NewLine + "Database: " + myConnection.Database )
- myConnection.ChangeDatabase( "test2" )
- MessageBox.Show( "ServerVersion: " + myConnection.ServerVersion _
- + ControlChars.NewLine + "Database: " + myConnection.Database )
- myConnection.Close()
- End Sub
-
-
-
- public void CreateMySqlConnection()
- {
- string myConnString =
- "Persist Security Info=False;database=test;server=localhost;user id=joeuser;pwd=pass";
- MySqlConnection myConnection = new MySqlConnection( myConnString );
- myConnection.Open();
- MessageBox.Show( "Server Version: " + myConnection.ServerVersion
- + "\nDatabase: " + myConnection.Database );
- myConnection.ChangeDatabase( "test2" );
- MessageBox.Show( "ServerVersion: " + myConnection.ServerVersion
- + "\nDatabase: " + myConnection.Database );
- myConnection.Close();
- }
-
-
- Public Sub CreateMySqlConnection(myConnString As String)
- Dim myConnection As New MySqlConnection(myConnString)
- myConnection.Open()
- MessageBox.Show("ServerVersion: " + myConnection.ServerVersion _
- + ControlChars.Cr + "State: " + myConnection.State.ToString())
- myConnection.Close()
- End Sub
-
-
- public void CreateMySqlConnection(string myConnString)
- {
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- myConnection.Open();
- MessageBox.Show("ServerVersion: " + myConnection.ServerVersion +
- "\nState: " + myConnection.State.ToString());
- myConnection.Close();
- }
-
-
- Public Sub CreateMySqlConnection(myConnString As String)
- Dim myConnection As New MySqlConnection(myConnString)
- myConnection.Open()
- MessageBox.Show("ServerVersion: " + myConnection.ServerVersion _
- + ControlChars.Cr + "State: " + myConnection.State.ToString())
- myConnection.Close()
- End Sub
-
-
- public void CreateMySqlConnection(string myConnString)
- {
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- myConnection.Open();
- MessageBox.Show("ServerVersion: " + myConnection.ServerVersion +
- "\nState: " + myConnection.State.ToString());
- myConnection.Close();
- }
-
- | Name | -Default | -Description | -
|---|---|---|
|
- Connect Timeout |
- 15 | -- The length of time (in seconds) to wait for a connection to the server before - terminating the attempt and generating an error. - | -
|
- Host |
- localhost | -
- |
-
| Port | -3306 | -- The port MySQL is using to listen for connections. This value is ignored if the connection protocol - is anything but socket. - | -
| Protocol | -socket | -
- Specifies the type of connection to make to the server. - pipe for a named pipe connection - unix for a Unix socket connection - memory to use MySQL shared memory - |
-
|
- CharSet |
- - | - Specifies the character set that should be used to encode all queries sent to the server. - Resultsets are still returned in the character set of the data returned. - | -
| Logging | -false | -When true, various pieces of information is output to any configured TraceListeners. | -
| Allow Batch | -true | -
- When true, multiple SQL statements can be sent with one command execution. - -Note- - Starting with MySQL 4.1.1, batch statements should be separated by the server-defined seperator character. - Commands sent to earlier versions of MySQL should be seperated with ';'. - |
-
| Encrypt | -false | -- When true, SSL/TLS encryption is used for all data sent between the - client and server if the server has a certificate installed. Recognized values - are true, false, yes, and no. - | -
|
- Initial Catalog |
- mysql | -The name of the database to use intially | -
|
- Password |
- - | The password for the MySQL account being used. | -
| Persist Security Info | -false | -- When set to false or no (strongly recommended), security-sensitive - information, such as the password, is not returned as part of the connection if - the connection is open or has ever been in an open state. Resetting the - connection string resets all connection string values including the password. - Recognized values are true, false, yes, and no. - | -
|
- User Id |
- - | The MySQL login account being used. | -
| Shared Memory Name | -MYSQL | -The name of the shared memory object to use for communication if the connection protocol is set to memory. | -
| Allow Zero Datetime | -false | -- True to have MySqlDataReader.GetValue() return a MySqlDateTime for date or datetime columns that have illegal values. - False will cause a DateTime object to be returned for legal values and an exception will be thrown for illegal values. - | -
| Convert Zero Datetime | -false | -- True to have MySqlDataReader.GetValue() and MySqlDataReader.GetDateTime() - return DateTime.MinValue for date or datetime columns that have illegal values. - | -
|
- Pipe Name |
- mysql | -
- When set to the name of a named pipe, the MySqlConnection will attempt to connect to MySQL
- on that named pipe. This settings only applies to the Windows platform. - |
-
|
- Use Performance Monitor |
- false | -- Posts performance data that can be tracked using perfmon - | -
| - Procedure Cache Size - | -25 | -- How many stored procedure definitions can be held in the cache - | -
| Use Procedure Bodies | -true | -- Instructs the provider to attempt to call the procedure without first resolving the metadata. This - is useful in situations where the calling user does not have access to the mysql.proc table. To - use this mode, the parameters for the procedure must be added to the command in the same order - as they appear in the procedure definition and their types must be explicitly set. - | -
| Auto Enlist | -true | -- Indicates whether the connection should automatically enlist in the current transaction, - if there is one. - | -
| Respect Binary Flags | -true | -- Indicates whether the connection should respect all binary flags sent to the client - as part of column metadata. False will cause the connector to behave like - Connector/NET 5.0 and earlier. - | -
| BlobAsUTF8IncludePattern | -null | -- Pattern that should be used to indicate which blob columns should be treated as UTF-8. - | -
| BlobAsUTF8ExcludePattern | -null | -- Pattern that should be used to indicate which blob columns should not be treated as UTF-8. - | -
| Default Command Timeout | -30 | -- The default timeout that new MySqlCommand objects will use unless changed. - | -
| Allow User Variables | -false | -- Should the provider expect user variables in the SQL. - | -
| Interactive -or- Interactive Session | -false | -- Should this session be considered interactive? - | -
| Functions Return String | -false | -- Set this option to true to force the return value of SQL functions to be string. - | -
| Use Affected Rows | -false | -- Set this option to true to cause the affected rows reported to reflect only the - rows that are actually changed. By default, the number of rows that are matched - is returned. - | -
| Name | -Default | -Description | -
|---|---|---|
| Connection Lifetime | -0 | -
- When a connection is returned to the pool, its creation time is compared with
- the current time, and the connection is destroyed if that time span (in seconds)
- exceeds the value specified by Connection Lifetime. This is useful in
- clustered configurations to force load balancing between a running server and a
- server just brought online.
- |
-
| Max Pool Size | -100 | -The maximum number of connections allowed in the pool. | -
| Min Pool Size | -0 | -The minimum number of connections allowed in the pool. | -
| Pooling | -true | -- When true, the MySqlConnection object is drawn from the appropriate - pool, or if necessary, is created and added to the appropriate pool. Recognized - values are true, false, yes, and no. - | -
| Connection Reset | -false | -- Specifies whether the database connection should be reset when being - drawn from the pool. Leaving this as false will yeild much faster - connection opens but the user should understand the side effects - of doing this such as temporary tables and user variables from the previous - session not being cleared out. - | -
| Cache Server Properties | -false | -- Specifies whether the server variables are cached between pooled connections. - On systems where the variables change infrequently and there are lots of - connection attempts, this can speed up things dramatically. - | -
- Public Sub CreateConnection()
- Dim myConnection As New MySqlConnection()
- myConnection.ConnectionString = "Persist Security Info=False;database=myDB;server=myHost;Connect Timeout=30;user id=myUser; pwd=myPass"
- myConnection.Open()
- End Sub 'CreateConnection
-
-
- public void CreateConnection()
- {
- MySqlConnection myConnection = new MySqlConnection();
- myConnection.ConnectionString = "Persist Security Info=False;database=myDB;server=myHost;Connect Timeout=30;user id=myUser; pwd=myPass";
- myConnection.Open();
- }
-
-
- Public Sub CreateConnection()
- Dim myConnection As New MySqlConnection()
- myConnection.ConnectionString = "database=myDB;server=/var/lib/mysql/mysql.sock;user id=myUser; pwd=myPass"
- myConnection.Open()
- End Sub 'CreateConnection
-
-
- public void CreateConnection()
- {
- MySqlConnection myConnection = new MySqlConnection();
- myConnection.ConnectionString = "database=myDB;server=/var/lib/mysql/mysql.sock;user id=myUser; pwd=myPass";
- myConnection.Open();
- }
-
-
- Public Sub RunTransaction(myConnString As String)
- Dim myConnection As New MySqlConnection(myConnString)
- myConnection.Open()
-
- Dim myCommand As MySqlCommand = myConnection.CreateCommand()
- Dim myTrans As MySqlTransaction
-
- ' Start a local transaction
- myTrans = myConnection.BeginTransaction()
- ' Must assign both transaction object and connection
- ' to Command object for a pending local transaction
- myCommand.Connection = myConnection
- myCommand.Transaction = myTrans
-
- Try
- myCommand.CommandText = "Insert into Test (id, desc) VALUES (100, 'Description')"
- myCommand.ExecuteNonQuery()
- myCommand.CommandText = "Insert into Test (id, desc) VALUES (101, 'Description')"
- myCommand.ExecuteNonQuery()
- myTrans.Commit()
- Console.WriteLine("Both records are written to database.")
- Catch e As Exception
- Try
- myTrans.Rollback()
- Catch ex As MySqlException
- If Not myTrans.Connection Is Nothing Then
- Console.WriteLine("An exception of type " + ex.GetType().ToString() + _
- " was encountered while attempting to roll back the transaction.")
- End If
- End Try
-
- Console.WriteLine("An exception of type " + e.GetType().ToString() + _
- "was encountered while inserting the data.")
- Console.WriteLine("Neither record was written to database.")
- Finally
- myConnection.Close()
- End Try
- End Sub
-
-
- public void RunTransaction(string myConnString)
- {
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- myConnection.Open();
-
- MySqlCommand myCommand = myConnection.CreateCommand();
- MySqlTransaction myTrans;
-
- // Start a local transaction
- myTrans = myConnection.BeginTransaction();
- // Must assign both transaction object and connection
- // to Command object for a pending local transaction
- myCommand.Connection = myConnection;
- myCommand.Transaction = myTrans;
-
- try
- {
- myCommand.CommandText = "insert into Test (id, desc) VALUES (100, 'Description')";
- myCommand.ExecuteNonQuery();
- myCommand.CommandText = "insert into Test (id, desc) VALUES (101, 'Description')";
- myCommand.ExecuteNonQuery();
- myTrans.Commit();
- Console.WriteLine("Both records are written to database.");
- }
- catch(Exception e)
- {
- try
- {
- myTrans.Rollback();
- }
- catch (SqlException ex)
- {
- if (myTrans.Connection != null)
- {
- Console.WriteLine("An exception of type " + ex.GetType() +
- " was encountered while attempting to roll back the transaction.");
- }
- }
-
- Console.WriteLine("An exception of type " + e.GetType() +
- " was encountered while inserting the data.");
- Console.WriteLine("Neither record was written to database.");
- }
- finally
- {
- myConnection.Close();
- }
- }
-
-
- Public Sub RunTransaction(myConnString As String)
- Dim myConnection As New MySqlConnection(myConnString)
- myConnection.Open()
-
- Dim myCommand As MySqlCommand = myConnection.CreateCommand()
- Dim myTrans As MySqlTransaction
-
- ' Start a local transaction
- myTrans = myConnection.BeginTransaction()
- ' Must assign both transaction object and connection
- ' to Command object for a pending local transaction
- myCommand.Connection = myConnection
- myCommand.Transaction = myTrans
-
- Try
- myCommand.CommandText = "Insert into Test (id, desc) VALUES (100, 'Description')"
- myCommand.ExecuteNonQuery()
- myCommand.CommandText = "Insert into Test (id, desc) VALUES (101, 'Description')"
- myCommand.ExecuteNonQuery()
- myTrans.Commit()
- Console.WriteLine("Both records are written to database.")
- Catch e As Exception
- Try
- myTrans.Rollback()
- Catch ex As MySqlException
- If Not myTrans.Connection Is Nothing Then
- Console.WriteLine("An exception of type " + ex.GetType().ToString() + _
- " was encountered while attempting to roll back the transaction.")
- End If
- End Try
-
- Console.WriteLine("An exception of type " + e.GetType().ToString() + _
- "was encountered while inserting the data.")
- Console.WriteLine("Neither record was written to database.")
- Finally
- myConnection.Close()
- End Try
- End Sub
-
-
- public void RunTransaction(string myConnString)
- {
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- myConnection.Open();
-
- MySqlCommand myCommand = myConnection.CreateCommand();
- MySqlTransaction myTrans;
-
- // Start a local transaction
- myTrans = myConnection.BeginTransaction();
- // Must assign both transaction object and connection
- // to Command object for a pending local transaction
- myCommand.Connection = myConnection;
- myCommand.Transaction = myTrans;
-
- try
- {
- myCommand.CommandText = "insert into Test (id, desc) VALUES (100, 'Description')";
- myCommand.ExecuteNonQuery();
- myCommand.CommandText = "insert into Test (id, desc) VALUES (101, 'Description')";
- myCommand.ExecuteNonQuery();
- myTrans.Commit();
- Console.WriteLine("Both records are written to database.");
- }
- catch(Exception e)
- {
- try
- {
- myTrans.Rollback();
- }
- catch (SqlException ex)
- {
- if (myTrans.Connection != null)
- {
- Console.WriteLine("An exception of type " + ex.GetType() +
- " was encountered while attempting to roll back the transaction.");
- }
- }
-
- Console.WriteLine("An exception of type " + e.GetType() +
- " was encountered while inserting the data.");
- Console.WriteLine("Neither record was written to database.");
- }
- finally
- {
- myConnection.Close();
- }
- }
-
-
- Public Sub CreateMySqlConnection()
- Dim myConnString As String = _
- "Persist Security Info=False;database=test;server=localhost;user id=joeuser;pwd=pass"
- Dim myConnection As New MySqlConnection( myConnString )
- myConnection.Open()
- MessageBox.Show( "Server Version: " + myConnection.ServerVersion _
- + ControlChars.NewLine + "Database: " + myConnection.Database )
- myConnection.ChangeDatabase( "test2" )
- MessageBox.Show( "ServerVersion: " + myConnection.ServerVersion _
- + ControlChars.NewLine + "Database: " + myConnection.Database )
- myConnection.Close()
- End Sub
-
-
-
- public void CreateMySqlConnection()
- {
- string myConnString =
- "Persist Security Info=False;database=test;server=localhost;user id=joeuser;pwd=pass";
- MySqlConnection myConnection = new MySqlConnection( myConnString );
- myConnection.Open();
- MessageBox.Show( "Server Version: " + myConnection.ServerVersion
- + "\nDatabase: " + myConnection.Database );
- myConnection.ChangeDatabase( "test2" );
- MessageBox.Show( "ServerVersion: " + myConnection.ServerVersion
- + "\nDatabase: " + myConnection.Database );
- myConnection.Close();
- }
-
-
- Public Sub CreateMySqlConnection(myConnString As String)
- Dim myConnection As New MySqlConnection(myConnString)
- myConnection.Open()
- MessageBox.Show("ServerVersion: " + myConnection.ServerVersion _
- + ControlChars.Cr + "State: " + myConnection.State.ToString())
- myConnection.Close()
- End Sub
-
-
- public void CreateMySqlConnection(string myConnString)
- {
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- myConnection.Open();
- MessageBox.Show("ServerVersion: " + myConnection.ServerVersion +
- "\nState: " + myConnection.State.ToString());
- myConnection.Close();
- }
-
-
- Public Sub CreateMySqlConnection(myConnString As String)
- Dim myConnection As New MySqlConnection(myConnString)
- myConnection.Open()
- MessageBox.Show("ServerVersion: " + myConnection.ServerVersion _
- + ControlChars.Cr + "State: " + myConnection.State.ToString())
- myConnection.Close()
- End Sub
-
-
- public void CreateMySqlConnection(string myConnString)
- {
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- myConnection.Open();
- MessageBox.Show("ServerVersion: " + myConnection.ServerVersion +
- "\nState: " + myConnection.State.ToString());
- myConnection.Close();
- }
-
-
- Public Sub ReadMyData(myConnString As String)
- Dim mySelectQuery As String = "SELECT OrderID, CustomerID FROM Orders"
- Dim myConnection As New MySqlConnection(myConnString)
- Dim myCommand As New MySqlCommand(mySelectQuery, myConnection)
- myConnection.Open()
- Dim myReader As MySqlDataReader
- myReader = myCommand.ExecuteReader()
- ' Always call Read before accessing data.
- While myReader.Read()
- Console.WriteLine((myReader.GetInt32(0) & ", " & myReader.GetString(1)))
- End While
- ' always call Close when done reading.
- myReader.Close()
- ' Close the connection when done with it.
- myConnection.Close()
- End Sub 'ReadMyData
-
-
- public void ReadMyData(string myConnString) {
- string mySelectQuery = "SELECT OrderID, CustomerID FROM Orders";
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- MySqlCommand myCommand = new MySqlCommand(mySelectQuery,myConnection);
- myConnection.Open();
- MySqlDataReader myReader;
- myReader = myCommand.ExecuteReader();
- // Always call Read before accessing data.
- while (myReader.Read()) {
- Console.WriteLine(myReader.GetInt32(0) + ", " + myReader.GetString(1));
- }
- // always call Close when done reading.
- myReader.Close();
- // Close the connection when done with it.
- myConnection.Close();
- }
-
-
- Public Sub ShowException()
- Dim mySelectQuery As String = "SELECT column1 FROM table1"
- Dim myConnection As New MySqlConnection ("Data Source=localhost;Database=Sample;")
- Dim myCommand As New MySqlCommand(mySelectQuery, myConnection)
-
- Try
- myCommand.Connection.Open()
- Catch e As MySqlException
- MessageBox.Show( e.Message )
- End Try
- End Sub
-
-
- public void ShowException()
- {
- string mySelectQuery = "SELECT column1 FROM table1";
- MySqlConnection myConnection =
- new MySqlConnection("Data Source=localhost;Database=Sample;");
- MySqlCommand myCommand = new MySqlCommand(mySelectQuery,myConnection);
-
- try
- {
- myCommand.Connection.Open();
- }
- catch (MySqlException e)
- {
- MessageBox.Show( e.Message );
- }
- }
-
-
- Public Shared Function SelectRows(myConnection As String, mySelectQuery As String, myTableName As String) As DataSet
- Dim myConn As New MySqlConnection(myConnection)
- Dim myDataAdapter As New MySqlDataAdapter()
- myDataAdapter.SelectCommand = New MySqlCommand(mySelectQuery, myConn)
- Dim cb As SqlCommandBuilder = New MySqlCommandBuilder(myDataAdapter)
-
- myConn.Open()
-
- Dim ds As DataSet = New DataSet
- myDataAdapter.Fill(ds, myTableName)
-
- ' Code to modify data in DataSet here
-
- ' Without the MySqlCommandBuilder this line would fail.
- myDataAdapter.Update(ds, myTableName)
-
- myConn.Close()
- End Function 'SelectRows
-
-
- public static DataSet SelectRows(string myConnection, string mySelectQuery, string myTableName)
- {
- MySqlConnection myConn = new MySqlConnection(myConnection);
- MySqlDataAdapter myDataAdapter = new MySqlDataAdapter();
- myDataAdapter.SelectCommand = new MySqlCommand(mySelectQuery, myConn);
- MySqlCommandBuilder cb = new MySqlCommandBuilder(myDataAdapter);
-
- myConn.Open();
-
- DataSet ds = new DataSet();
- myDataAdapter.Fill(ds, myTableName);
-
- //code to modify data in DataSet here
-
- //Without the MySqlCommandBuilder this line would fail
- myDataAdapter.Update(ds, myTableName);
-
- myConn.Close();
-
- return ds;
- }
-
-
-
- Public Function SelectRows(dataSet As DataSet, connection As String, query As String) As DataSet
- Dim conn As New MySqlConnection(connection)
- Dim adapter As New MySqlDataAdapter()
- adapter.SelectCommand = new MySqlCommand(query, conn)
- adapter.Fill(dataset)
- Return dataset
- End Function
-
-
- public DataSet SelectRows(DataSet dataset,string connection,string query)
- {
- MySqlConnection conn = new MySqlConnection(connection);
- MySqlDataAdapter adapter = new MySqlDataAdapter();
- adapter.SelectCommand = new MySqlCommand(query, conn);
- adapter.Fill(dataset);
- return dataset;
- }
-
-
- Public Sub CreateSqlDataAdapter()
- Dim conn As MySqlConnection = New MySqlConnection("Data Source=localhost;" & _
- "database=test")
- Dim da As MySqlDataAdapter = New MySqlDataAdapter
- da.MissingSchemaAction = MissingSchemaAction.AddWithKey
-
- da.SelectCommand = New MySqlCommand("SELECT id, name FROM mytable", conn)
- da.InsertCommand = New MySqlCommand("INSERT INTO mytable (id, name) " & _
- "VALUES (@id, @name)", conn)
- da.UpdateCommand = New MySqlCommand("UPDATE mytable SET id=@id, name=@name " & _
- "WHERE id=@oldId", conn)
- da.DeleteCommand = New MySqlCommand("DELETE FROM mytable WHERE id=@id", conn)
-
- da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
- da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
-
- da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
- da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
- da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
-
- da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
- End Sub
-
-
- public static void CreateSqlDataAdapter()
- {
- MySqlConnection conn = new MySqlConnection("Data Source=localhost;database=test");
- MySqlDataAdapter da = new MySqlDataAdapter();
- da.MissingSchemaAction = MissingSchemaAction.AddWithKey;
-
- da.SelectCommand = new MySqlCommand("SELECT id, name FROM mytable", conn);
- da.InsertCommand = new MySqlCommand("INSERT INTO mytable (id, name) " +
- "VALUES (@id, @name)", conn);
- da.UpdateCommand = new MySqlCommand("UPDATE mytable SET id=@id, name=@name " +
- "WHERE id=@oldId", conn);
- da.DeleteCommand = new MySqlCommand("DELETE FROM mytable WHERE id=@id", conn);
-
- da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
- da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
-
- da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
- da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
- da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
-
- da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
- }
-
-
- Public Sub CreateSqlDataAdapter()
- Dim conn As MySqlConnection = New MySqlConnection("Data Source=localhost;" & _
- "database=test")
- Dim cmd as new MySqlCommand("SELECT id, name FROM mytable", conn)
- Dim da As MySqlDataAdapter = New MySqlDataAdapter(cmd)
- da.MissingSchemaAction = MissingSchemaAction.AddWithKey
-
- da.InsertCommand = New MySqlCommand("INSERT INTO mytable (id, name) " & _
- "VALUES (@id, @name)", conn)
- da.UpdateCommand = New MySqlCommand("UPDATE mytable SET id=@id, name=@name " & _
- "WHERE id=@oldId", conn)
- da.DeleteCommand = New MySqlCommand("DELETE FROM mytable WHERE id=@id", conn)
-
- da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
- da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
-
- da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
- da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
- da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
-
- da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
- End Sub
-
-
- public static void CreateSqlDataAdapter()
- {
- MySqlConnection conn = new MySqlConnection("Data Source=localhost;database=test");
- MySqlCommand cmd = new MySqlCommand("SELECT id, name FROM mytable", conn);
- MySqlDataAdapter da = new MySqlDataAdapter(cmd);
- da.MissingSchemaAction = MissingSchemaAction.AddWithKey;
-
- da.InsertCommand = new MySqlCommand("INSERT INTO mytable (id, name) " +
- "VALUES (@id, @name)", conn);
- da.UpdateCommand = new MySqlCommand("UPDATE mytable SET id=@id, name=@name " +
- "WHERE id=@oldId", conn);
- da.DeleteCommand = new MySqlCommand("DELETE FROM mytable WHERE id=@id", conn);
-
- da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
- da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
-
- da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
- da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
- da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
-
- da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
- }
-
-
- Public Sub CreateSqlDataAdapter()
- Dim conn As MySqlConnection = New MySqlConnection("Data Source=localhost;" & _
- "database=test")
- Dim da As MySqlDataAdapter = New MySqlDataAdapter("SELECT id, name FROM mytable", conn)
- da.MissingSchemaAction = MissingSchemaAction.AddWithKey
-
- da.InsertCommand = New MySqlCommand("INSERT INTO mytable (id, name) " & _
- "VALUES (@id, @name)", conn)
- da.UpdateCommand = New MySqlCommand("UPDATE mytable SET id=@id, name=@name " & _
- "WHERE id=@oldId", conn)
- da.DeleteCommand = New MySqlCommand("DELETE FROM mytable WHERE id=@id", conn)
-
- da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
- da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
-
- da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
- da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
- da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
-
- da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
- End Sub
-
-
- public static void CreateSqlDataAdapter()
- {
- MySqlConnection conn = new MySqlConnection("Data Source=localhost;database=test");
- MySqlDataAdapter da = new MySqlDataAdapter("SELECT id, name FROM mytable", conn);
- da.MissingSchemaAction = MissingSchemaAction.AddWithKey;
-
- da.InsertCommand = new MySqlCommand("INSERT INTO mytable (id, name) " +
- "VALUES (@id, @name)", conn);
- da.UpdateCommand = new MySqlCommand("UPDATE mytable SET id=@id, name=@name " +
- "WHERE id=@oldId", conn);
- da.DeleteCommand = new MySqlCommand("DELETE FROM mytable WHERE id=@id", conn);
-
- da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
- da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
-
- da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
- da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
- da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
-
- da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
- }
-
-
- Public Sub CreateSqlDataAdapter()
- Dim da As MySqlDataAdapter = New MySqlDataAdapter("SELECT id, name FROM mytable", "Data Source=localhost;database=test")
- Dim conn As MySqlConnection = da.SelectCommand.Connection
- da.MissingSchemaAction = MissingSchemaAction.AddWithKey
-
- da.InsertCommand = New MySqlCommand("INSERT INTO mytable (id, name) " & _
- "VALUES (@id, @name)", conn)
- da.UpdateCommand = New MySqlCommand("UPDATE mytable SET id=@id, name=@name " & _
- "WHERE id=@oldId", conn)
- da.DeleteCommand = New MySqlCommand("DELETE FROM mytable WHERE id=@id", conn)
-
- da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
- da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
-
- da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
- da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
- da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
-
- da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
- End Sub
-
-
- public static void CreateSqlDataAdapter()
- {
- MySqlDataAdapter da = new MySqlDataAdapter("SELECT id, name FROM mytable", "Data Source=localhost;database=test");
- MySqlConnection conn = da.SelectCommand.Connection;
- da.MissingSchemaAction = MissingSchemaAction.AddWithKey;
-
- da.InsertCommand = new MySqlCommand("INSERT INTO mytable (id, name) " +
- "VALUES (@id, @name)", conn);
- da.UpdateCommand = new MySqlCommand("UPDATE mytable SET id=@id, name=@name " +
- "WHERE id=@oldId", conn);
- da.DeleteCommand = new MySqlCommand("DELETE FROM mytable WHERE id=@id", conn);
-
- da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
- da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
-
- da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
- da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
- da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
-
- da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
- }
-
-
- Public Shared Function CreateCustomerAdapter(conn As MySqlConnection) As MySqlDataAdapter
-
- Dim da As MySqlDataAdapter = New MySqlDataAdapter()
- Dim cmd As MySqlCommand
- Dim parm As MySqlParameter
-
- ' Create the SelectCommand.
- cmd = New MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn)
-
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15)
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15)
-
- da.SelectCommand = cmd
-
- ' Create the DeleteCommand.
- cmd = New MySqlCommand("DELETE FROM mytable WHERE id=@id", conn)
-
- parm = cmd.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
- parm.SourceVersion = DataRowVersion.Original
-
- da.DeleteCommand = cmd
-
- Return da
- End Function
-
-
- public static MySqlDataAdapter CreateCustomerAdapter(MySqlConnection conn)
- {
- MySqlDataAdapter da = new MySqlDataAdapter();
- MySqlCommand cmd;
- MySqlParameter parm;
-
- // Create the SelectCommand.
- cmd = new MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn);
-
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15);
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15);
-
- da.SelectCommand = cmd;
-
- // Create the DeleteCommand.
- cmd = new MySqlCommand("DELETE FROM mytable WHERE id=@id", conn);
-
- parm = cmd.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
- parm.SourceVersion = DataRowVersion.Original;
-
- da.DeleteCommand = cmd;
-
- return da;
- }
-
-
- Public Shared Function CreateCustomerAdapter(conn As MySqlConnection) As MySqlDataAdapter
-
- Dim da As MySqlDataAdapter = New MySqlDataAdapter()
- Dim cmd As MySqlCommand
- Dim parm As MySqlParameter
-
- ' Create the SelectCommand.
- cmd = New MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn)
-
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15)
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15)
-
- da.SelectCommand = cmd
-
- ' Create the InsertCommand.
- cmd = New MySqlCommand("INSERT INTO mytable (id,name) VALUES (@id, @name)", conn)
-
- cmd.Parameters.Add( "@id", MySqlDbType.VarChar, 15, "id" )
- cmd.Parameters.Add( "@name", MySqlDbType.VarChar, 15, "name" )
- da.InsertCommand = cmd
-
- Return da
- End Function
-
-
- public static MySqlDataAdapter CreateCustomerAdapter(MySqlConnection conn)
- {
- MySqlDataAdapter da = new MySqlDataAdapter();
- MySqlCommand cmd;
- MySqlParameter parm;
-
- // Create the SelectCommand.
- cmd = new MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn);
-
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15);
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15);
-
- da.SelectCommand = cmd;
-
- // Create the InsertCommand.
- cmd = new MySqlCommand("INSERT INTO mytable (id,name) VALUES (@id,@name)", conn);
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15, "id" );
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15, "name" );
-
- da.InsertCommand = cmd;
-
- return da;
- }
-
-
- Public Shared Function CreateCustomerAdapter(conn As MySqlConnection) As MySqlDataAdapter
-
- Dim da As MySqlDataAdapter = New MySqlDataAdapter()
- Dim cmd As MySqlCommand
- Dim parm As MySqlParameter
-
- ' Create the SelectCommand.
- cmd = New MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn)
-
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15)
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15)
-
- da.SelectCommand = cmd
-
- ' Create the InsertCommand.
- cmd = New MySqlCommand("INSERT INTO mytable (id,name) VALUES (@id, @name)", conn)
-
- cmd.Parameters.Add( "@id", MySqlDbType.VarChar, 15, "id" )
- cmd.Parameters.Add( "@name", MySqlDbType.VarChar, 15, "name" )
- da.InsertCommand = cmd
-
- Return da
- End Function
-
-
- public static MySqlDataAdapter CreateCustomerAdapter(MySqlConnection conn)
- {
- MySqlDataAdapter da = new MySqlDataAdapter();
- MySqlCommand cmd;
- MySqlParameter parm;
-
- // Create the SelectCommand.
- cmd = new MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn);
-
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15);
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15);
-
- da.SelectCommand = cmd;
-
- // Create the InsertCommand.
- cmd = new MySqlCommand("INSERT INTO mytable (id,name) VALUES (@id,@name)", conn);
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15, "id" );
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15, "name" );
-
- da.InsertCommand = cmd;
-
- return da;
- }
-
-
- Public Shared Function CreateCustomerAdapter(conn As MySqlConnection) As MySqlDataAdapter
-
- Dim da As MySqlDataAdapter = New MySqlDataAdapter()
- Dim cmd As MySqlCommand
- Dim parm As MySqlParameter
-
- ' Create the SelectCommand.
- cmd = New MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn)
-
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15)
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15)
-
- da.SelectCommand = cmd
-
- ' Create the UpdateCommand.
- cmd = New MySqlCommand("UPDATE mytable SET id=@id, name=@name WHERE id=@oldId", conn)
-
- cmd.Parameters.Add( "@id", MySqlDbType.VarChar, 15, "id" )
- cmd.Parameters.Add( "@name", MySqlDbType.VarChar, 15, "name" )
-
- parm = cmd.Parameters.Add("@oldId", MySqlDbType.VarChar, 15, "id")
- parm.SourceVersion = DataRowVersion.Original
-
- da.UpdateCommand = cmd
-
- Return da
- End Function
-
-
- public static MySqlDataAdapter CreateCustomerAdapter(MySqlConnection conn)
- {
- MySqlDataAdapter da = new MySqlDataAdapter();
- MySqlCommand cmd;
- MySqlParameter parm;
-
- // Create the SelectCommand.
- cmd = new MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn);
-
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15);
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15);
-
- da.SelectCommand = cmd;
-
- // Create the UpdateCommand.
- cmd = new MySqlCommand("UPDATE mytable SET id=@id, name=@name WHERE id=@oldId", conn);
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15, "id" );
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15, "name" );
-
- parm = cmd.Parameters.Add( "@oldId", MySqlDbType.VarChar, 15, "id" );
- parm.SourceVersion = DataRowVersion.Original;
-
- da.UpdateCommand = cmd;
-
- return da;
- }
-
-
- Public Sub AddParameters()
- ' ...
- ' create myDataSet and myDataAdapter
- ' ...
- myDataAdapter.SelectCommand.Parameters.Add("@CategoryName", MySqlDbType.VarChar, 80).Value = "toasters"
- myDataAdapter.SelectCommand.Parameters.Add("@SerialNum", MySqlDbType.Long).Value = 239
-
- myDataAdapter.Fill(myDataSet)
- End Sub 'AddSqlParameters
-
-
- public void AddSqlParameters()
- {
- // ...
- // create myDataSet and myDataAdapter
- // ...
-
- myDataAdapter.SelectCommand.Parameters.Add("@CategoryName", MySqlDbType.VarChar, 80).Value = "toasters";
- myDataAdapter.SelectCommand.Parameters.Add("@SerialNum", MySqlDbType.Long).Value = 239;
- myDataAdapter.Fill(myDataSet);
-
- }
-
-
- Public Sub RunTransaction(myConnString As String)
- Dim myConnection As New MySqlConnection(myConnString)
- myConnection.Open()
-
- Dim myCommand As MySqlCommand = myConnection.CreateCommand()
- Dim myTrans As MySqlTransaction
-
- ' Start a local transaction
- myTrans = myConnection.BeginTransaction()
- ' Must assign both transaction object and connection
- ' to Command object for a pending local transaction
- myCommand.Connection = myConnection
- myCommand.Transaction = myTrans
-
- Try
- myCommand.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')"
- myCommand.ExecuteNonQuery()
- myCommand.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')"
- myCommand.ExecuteNonQuery()
- myTrans.Commit()
- Console.WriteLine("Both records are written to database.")
- Catch e As Exception
- Try
- myTrans.Rollback()
- Catch ex As MySqlException
- If Not myTrans.Connection Is Nothing Then
- Console.WriteLine("An exception of type " & ex.GetType().ToString() & _
- " was encountered while attempting to roll back the transaction.")
- End If
- End Try
-
- Console.WriteLine("An exception of type " & e.GetType().ToString() & _
- "was encountered while inserting the data.")
- Console.WriteLine("Neither record was written to database.")
- Finally
- myConnection.Close()
- End Try
- End Sub 'RunTransaction
-
-
- public void RunTransaction(string myConnString)
- {
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- myConnection.Open();
-
- MySqlCommand myCommand = myConnection.CreateCommand();
- MySqlTransaction myTrans;
-
- // Start a local transaction
- myTrans = myConnection.BeginTransaction();
- // Must assign both transaction object and connection
- // to Command object for a pending local transaction
- myCommand.Connection = myConnection;
- myCommand.Transaction = myTrans;
-
- try
- {
- myCommand.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')";
- myCommand.ExecuteNonQuery();
- myCommand.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')";
- myCommand.ExecuteNonQuery();
- myTrans.Commit();
- Console.WriteLine("Both records are written to database.");
- }
- catch(Exception e)
- {
- try
- {
- myTrans.Rollback();
- }
- catch (MySqlException ex)
- {
- if (myTrans.Connection != null)
- {
- Console.WriteLine("An exception of type " + ex.GetType() +
- " was encountered while attempting to roll back the transaction.");
- }
- }
-
- Console.WriteLine("An exception of type " + e.GetType() +
- " was encountered while inserting the data.");
- Console.WriteLine("Neither record was written to database.");
- }
- finally
- {
- myConnection.Close();
- }
- }
-
-
- Public Sub RunSqlTransaction(myConnString As String)
- Dim myConnection As New MySqlConnection(myConnString)
- myConnection.Open()
-
- Dim myCommand As MySqlCommand = myConnection.CreateCommand()
- Dim myTrans As MySqlTransaction
-
- ' Start a local transaction
- myTrans = myConnection.BeginTransaction()
-
- ' Must assign both transaction object and connection
- ' to Command object for a pending local transaction
- myCommand.Connection = myConnection
- myCommand.Transaction = myTrans
-
- Try
- myCommand.CommandText = "Insert into mytable (id, desc) VALUES (100, 'Description')"
- myCommand.ExecuteNonQuery()
- myCommand.CommandText = "Insert into mytable (id, desc) VALUES (101, 'Description')"
- myCommand.ExecuteNonQuery()
- myTrans.Commit()
- Console.WriteLine("Success.")
- Catch e As Exception
- Try
- myTrans.Rollback()
- Catch ex As MySqlException
- If Not myTrans.Connection Is Nothing Then
- Console.WriteLine("An exception of type " & ex.GetType().ToString() & _
- " was encountered while attempting to roll back the transaction.")
- End If
- End Try
-
- Console.WriteLine("An exception of type " & e.GetType().ToString() & _
- "was encountered while inserting the data.")
- Console.WriteLine("Neither record was written to database.")
- Finally
- myConnection.Close()
- End Try
- End Sub
-
-
- public void RunSqlTransaction(string myConnString)
- {
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- myConnection.Open();
-
- MySqlCommand myCommand = myConnection.CreateCommand();
- MySqlTransaction myTrans;
-
- // Start a local transaction
- myTrans = myConnection.BeginTransaction();
- // Must assign both transaction object and connection
- // to Command object for a pending local transaction
- myCommand.Connection = myConnection;
- myCommand.Transaction = myTrans;
-
- try
- {
- myCommand.CommandText = "Insert into mytable (id, desc) VALUES (100, 'Description')";
- myCommand.ExecuteNonQuery();
- myCommand.CommandText = "Insert into mytable (id, desc) VALUES (101, 'Description')";
- myCommand.ExecuteNonQuery();
- myTrans.Commit();
- Console.WriteLine("Both records are written to database.");
- }
- catch(Exception e)
- {
- try
- {
- myTrans.Rollback();
- }
- catch (MySqlException ex)
- {
- if (myTrans.Connection != null)
- {
- Console.WriteLine("An exception of type " + ex.GetType() +
- " was encountered while attempting to roll back the transaction.");
- }
- }
-
- Console.WriteLine("An exception of type " + e.GetType() +
- " was encountered while inserting the data.");
- Console.WriteLine("Neither record was written to database.");
- }
- finally
- {
- myConnection.Close();
- }
- }
-
-
- Public Sub RunSqlTransaction(myConnString As String)
- Dim myConnection As New MySqlConnection(myConnString)
- myConnection.Open()
-
- Dim myCommand As MySqlCommand = myConnection.CreateCommand()
- Dim myTrans As MySqlTransaction
-
- ' Start a local transaction
- myTrans = myConnection.BeginTransaction()
-
- ' Must assign both transaction object and connection
- ' to Command object for a pending local transaction
- myCommand.Connection = myConnection
- myCommand.Transaction = myTrans
-
- Try
- myCommand.CommandText = "Insert into mytable (id, desc) VALUES (100, 'Description')"
- myCommand.ExecuteNonQuery()
- myCommand.CommandText = "Insert into mytable (id, desc) VALUES (101, 'Description')"
- myCommand.ExecuteNonQuery()
- myTrans.Commit()
- Console.WriteLine("Success.")
- Catch e As Exception
- Try
- myTrans.Rollback()
- Catch ex As MySqlException
- If Not myTrans.Connection Is Nothing Then
- Console.WriteLine("An exception of type " & ex.GetType().ToString() & _
- " was encountered while attempting to roll back the transaction.")
- End If
- End Try
-
- Console.WriteLine("An exception of type " & e.GetType().ToString() & _
- "was encountered while inserting the data.")
- Console.WriteLine("Neither record was written to database.")
- Finally
- myConnection.Close()
- End Try
- End Sub
-
-
- public void RunSqlTransaction(string myConnString)
- {
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- myConnection.Open();
-
- MySqlCommand myCommand = myConnection.CreateCommand();
- MySqlTransaction myTrans;
-
- // Start a local transaction
- myTrans = myConnection.BeginTransaction();
- // Must assign both transaction object and connection
- // to Command object for a pending local transaction
- myCommand.Connection = myConnection;
- myCommand.Transaction = myTrans;
-
- try
- {
- myCommand.CommandText = "Insert into mytable (id, desc) VALUES (100, 'Description')";
- myCommand.ExecuteNonQuery();
- myCommand.CommandText = "Insert into mytable (id, desc) VALUES (101, 'Description')";
- myCommand.ExecuteNonQuery();
- myTrans.Commit();
- Console.WriteLine("Both records are written to database.");
- }
- catch(Exception e)
- {
- try
- {
- myTrans.Rollback();
- }
- catch (MySqlException ex)
- {
- if (myTrans.Connection != null)
- {
- Console.WriteLine("An exception of type " + ex.GetType() +
- " was encountered while attempting to roll back the transaction.");
- }
- }
-
- Console.WriteLine("An exception of type " + e.GetType() +
- " was encountered while inserting the data.");
- Console.WriteLine("Neither record was written to database.");
- }
- finally
- {
- myConnection.Close();
- }
- }
-
- ref
- ref
-
- new { pooling = new
- {
- enabled = true,
- maxSize = 15,
- maxIdleTime = 60000,
- queueTimeout = 60000
- }
- }
-
-
- new { pooling = new
- {
- enabled = true,
- maxSize = 15,
- maxIdleTime = 60000,
- queueTimeout = 60000
- }
- }
-
-
- [JsonContainer(ItemConverterType = typeof(MyContainerConverter), ItemConverterParameters = new object[] { 123, "Four" })]
-
-
- [JsonContainer(NamingStrategyType = typeof(MyNamingStrategy), NamingStrategyParameters = new object[] { 123, "Four" })]
-
-
- [JsonProperty(ItemConverterType = typeof(MyContainerConverter), ItemConverterParameters = new object[] { 123, "Four" })]
-
-
- [JsonProperty(NamingStrategyType = typeof(MyNamingStrategy), NamingStrategyParameters = new object[] { 123, "Four" })]
-
- From Knuth Vol 2, pg 395.
-SimpleBigDecimal is basically a
- {@link java.math.BigInteger BigInteger} with a few digits on the right of
- the decimal point. The number of (binary) digits on the right of the decimal
- point is called the scale of the SimpleBigDecimal.
- Unlike in {@link java.math.BigDecimal BigDecimal}, the scale is not adjusted
- automatically, but must be set manually. All SimpleBigDecimals
- taking part in the same arithmetic operation must have equal scale. The
- result of a multiplication of two SimpleBigDecimals returns a
- SimpleBigDecimal with double scale.
- SimpleBigDecimal representing the same numerical
- value as value.
- @param value The value of the SimpleBigDecimal to be
- created.
- @param scale The scale of the SimpleBigDecimal to be
- created.
- @return The such created SimpleBigDecimal.
- SimpleBigDecimal. The value of the
- constructed SimpleBigDecimal Equals bigInt /
- 2scale.
- @param bigInt The bigInt value parameter.
- @param scale The scale of the constructed SimpleBigDecimal.
- αu's must be computed differently, see
- e.g. "Guide to Elliptic Curve Cryptography", Darrel Hankerson,
- Alfred Menezes, Scott Vanstone, Springer-Verlag New York Inc., 2004,
- p. 121-122
- αu's for a=0 as an array
- of ZTauElements.
- αu's for a=0 as an array
- of TNAFs.
- αu's for a=1 as an array
- of ZTauElements.
- αu's for a=1 as an array
- of TNAFs.
- λ of
- Z[τ].
- @param mu The parameter μ of the elliptic curve.
- @param lambda The element λ of
- Z[τ].
- @return The norm of λ.
- λ of
- R[τ], where λ = u + vτ
- and u and u are real numbers (elements of
- R).
- @param mu The parameter μ of the elliptic curve.
- @param u The real part of the element λ of
- R[τ].
- @param v The τ-adic part of the element
- λ of R[τ].
- @return The norm of λ.
- λ of R[τ]
- to an element of Z[τ], such that their difference
- has minimal norm. λ is given as
- λ = λ0 + λ1τ.
- @param lambda0 The component λ0.
- @param lambda1 The component λ1.
- @param mu The parameter μ of the elliptic curve. Must
- equal 1 or -1.
- @return The rounded element of Z[τ].
- @throws ArgumentException if lambda0 and
- lambda1 do not have same scale.
- n. For an integer
- k, the value λ = s k / n is
- computed to c bits of accuracy.
- @param k The parameter k.
- @param s The curve parameter s0 or
- s1.
- @param vm The Lucas Sequence element Vm.
- @param a The parameter a of the elliptic curve.
- @param m The bit length of the finite field
- Fm.
- @param c The number of bits of accuracy, i.e. the scale of the returned
- SimpleBigDecimal.
- @return The value λ = s k / n computed to
- c bits of accuracy.
- τ-adic NAF (non-adjacent form) of an
- element λ of Z[τ].
- @param mu The parameter μ of the elliptic curve.
- @param lambda The element λ of
- Z[τ].
- @return The τ-adic NAF of λ.
- τ() to an
- AbstractF2mPoint.
- @param p The AbstractF2mPoint to which τ() is applied.
- @return τ(p)
- μ of the elliptic curve.
- @param curve The elliptic curve from which to obtain μ.
- The curve must be a Koblitz curve, i.e. a Equals
- 0 or 1 and b Equals
- 1.
- @return μ of the elliptic curve.
- @throws ArgumentException if the given ECCurve is not a Koblitz
- curve.
- Uk-1 and
- Uk or Vk-1 and
- Vk.
- @param mu The parameter μ of the elliptic curve.
- @param k The index of the second element of the Lucas Sequence to be
- returned.
- @param doV If set to true, computes Vk-1 and
- Vk, otherwise Uk-1 and
- Uk.
- @return An array with 2 elements, containing Uk-1
- and Uk or Vk-1
- and Vk.
- tw. If the width is
- 4, then for mu = 1, tw = 6 and for
- mu = -1, tw = 10
- @param mu The parameter μ of the elliptic curve.
- @param w The window width of the WTNAF.
- @return the auxiliary value tw
- s0 and
- s1 used for partial modular reduction.
- @param curve The elliptic curve for which to compute
- s0 and s1.
- @throws ArgumentException if curve is not a
- Koblitz curve (Anomalous Binary Curve, ABC).
- (τm - 1)/(τ - 1).
- @param k The integer to be reduced.
- @param m The bitlength of the underlying finite field.
- @param a The parameter a of the elliptic curve.
- @param s The auxiliary values s0 and
- s1.
- @param mu The parameter μ of the elliptic curve.
- @param c The precision (number of bits of accuracy) of the partial
- modular reduction.
- @return ρ := k partmod (τm - 1)/(τ - 1)
- BigInteger using the reduced τ-adic
- NAF (RTNAF) method.
- @param p The AbstractF2mPoint to Multiply.
- @param k The BigInteger by which to Multiply p.
- @return k * p
- λ of Z[τ]
- using the τ-adic NAF (TNAF) method.
- @param p The AbstractF2mPoint to Multiply.
- @param lambda The element λ of
- Z[τ].
- @return λ * p
- λ of Z[τ]
- using the τ-adic NAF (TNAF) method, given the TNAF
- of λ.
- @param p The AbstractF2mPoint to Multiply.
- @param u The the TNAF of λ..
- @return λ * p
- [τ]-adic window NAF of an element
- λ of Z[τ].
- @param mu The parameter μ of the elliptic curve.
- @param lambda The element λ of
- Z[τ] of which to compute the
- [τ]-adic NAF.
- @param width The window width of the resulting WNAF.
- @param pow2w 2width.
- @param tw The auxiliary value tw.
- @param alpha The αu's for the window width.
- @return The [τ]-adic window NAF of
- λ.
- ECPoint for which to do the precomputation.
- @param a The parameter a of the elliptic curve.
- @return The precomputation array for p.
- Z[τ]. Let
- λ be an element of Z[τ]. Then
- λ is given as λ = u + vτ. The
- components u and v may be used directly, there
- are no accessor methods.
- Immutable class.
- λ.
- τ-adic" part of λ.
- λ of
- Z[τ].
- @param u The "real" part of λ.
- @param v The "τ-adic" part of
- λ.
- kP.
- PreCompInfo for a point on this curve, under a given name. Used by
- ECMultipliers to save the precomputation for this ECPoint for use
- by subsequent multiplication.
-
- @param point
- The ECPoint to store precomputations for.
- @param name
- A String used to index precomputations of different types.
- @param callback
- Called to calculate the PreCompInfo.
- ECCurve instance, and MUST already be normalized.
- ECMultiplier, unless already set.
- Fp (X9.62 s 4.2.1 pg 17).
- @return The decoded point.
- s0 and
- s1 used for partial modular reduction for
- Koblitz curves.
- z2 + z = beta(X9.62
- D.1.6) The other solution is z + 1.
-
- @param beta
- The value to solve the quadratic equation for.
- @return the solution for z2 + z = beta or
- null if no solution exists.
- s0 and
- s1 used for partial modular reduction for
- Koblitz curves.
- y2 + xy = x3 + ax2 + b.
- m of F2m.
- k where xm +
- xk + 1 represents the reduction polynomial
- f(z).k1 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).0k2 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).0k3 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).m of
- F2m.
- @param k The integer k where xm +
- xk + 1 represents the reduction
- polynomial f(z).
- @param a The coefficient a in the Weierstrass equation
- for non-supersingular elliptic curves over
- F2m.
- @param b The coefficient b in the Weierstrass equation
- for non-supersingular elliptic curves over
- F2m.
- m of
- F2m.
- @param k The integer k where xm +
- xk + 1 represents the reduction
- polynomial f(z).
- @param a The coefficient a in the Weierstrass equation
- for non-supersingular elliptic curves over
- F2m.
- @param b The coefficient b in the Weierstrass equation
- for non-supersingular elliptic curves over
- F2m.
- @param order The order of the main subgroup of the elliptic curve.
- @param cofactor The cofactor of the elliptic curve, i.e.
- #Ea(F2m) = h * n.
- m of
- F2m.
- @param k1 The integer k1 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).
- @param k2 The integer k2 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).
- @param k3 The integer k3 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).
- @param a The coefficient a in the Weierstrass equation
- for non-supersingular elliptic curves over
- F2m.
- @param b The coefficient b in the Weierstrass equation
- for non-supersingular elliptic curves over
- F2m.
- m of
- F2m.
- @param k1 The integer k1 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).
- @param k2 The integer k2 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).
- @param k3 The integer k3 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).
- @param a The coefficient a in the Weierstrass equation
- for non-supersingular elliptic curves over
- F2m.
- @param b The coefficient b in the Weierstrass equation
- for non-supersingular elliptic curves over
- F2m.
- @param order The order of the main subgroup of the elliptic curve.
- @param cofactor The cofactor of the elliptic curve, i.e.
- #Ea(F2m) = h * n.
- F2m in polynomial basis (PB)
- representation. Both trinomial (Tpb) and pentanomial (Ppb) polynomial
- basis representations are supported. Gaussian normal basis (GNB)
- representation is not supported.
- m of F2m.
- LongArray holding the bits.
- m of
- F2m.
- @param k1 The integer k1 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).
- @param k2 The integer k2 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).
- @param k3 The integer k3 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).
- @param x The BigInteger representing the value of the field element.
- m of
- F2m.
- @param k The integer k where xm +
- xk + 1 represents the reduction
- polynomial f(z).
- @param x The BigInteger representing the value of the field element.
- a and b
- are elements of the same field F2m
- (having the same representation).
- @param a field element.
- @param b field element to be compared.
- @throws ArgumentException if a and b
- are not elements of the same field
- F2m (having the same
- representation).
- F2m, either of
- {@link F2mFieldElement.Tpb} (trinomial
- basis representation) or
- {@link F2mFieldElement.Ppb} (pentanomial
- basis representation).
- m of the reduction polynomial
- f(z).
- k where xm +
- xk + 1 represents the reduction polynomial
- f(z).k1 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).0k2 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).0k3 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).ECPoint by the given number.
- @param k The multiplicator.
- @return k * this.
- ECPoints.
- ECPoint p by k, i.e.
- p is added k times to itself.
- @param p The ECPoint to be multiplied.
- @param k The factor by which p is multiplied.
- @return p multiplied by k.
- ECPoints used for a fixed point multiplication.
- WNafMultiplier.
- this by an integer k using the
- Window NAF method.
- @param k The integer by which this is multiplied.
- @return A new ECPoint which equals this
- multiplied by k.
- ECPoints used for a Window
- NAF multiplication.
- ECPoints used
- for a Window NAF multiplication.
- ECPoint representing Twice(this). Used for the
- Window NAF multiplication to create or extend the precomputed values.
- w of the Window NAF. The width is
- defined as the minimal number w, such that for any
- w consecutive digits in the resulting representation, at
- most one is non-zero.
- @param k The integer of which the Window NAF is computed.
- @return The Window NAF of the given width, such that the following holds:
- k = ∑i=0l-1 ki2i
- , where the ki denote the elements of the
- returned byte[].
- τ-adic Non-Adjacent Form) algorithm.
- k using the reduced τ-adic NAF (RTNAF)
- method.
- @param p The AbstractF2mPoint to multiply.
- @param k The integer by which to multiply k.
- @return p multiplied by k.
- λ of Z[τ] using
- the τ-adic NAF (TNAF) method.
- @param p The AbstractF2mPoint to multiply.
- @param lambda The element λ of
- Z[τ] of which to compute the
- [τ]-adic NAF.
- @return p multiplied by λ.
- λ of Z[τ]
- using the window τ-adic NAF (TNAF) method, given the
- WTNAF of λ.
- @param p The AbstractF2mPoint to multiply.
- @param u The the WTNAF of λ..
- @return λ * p
- τ-adic Non-Adjacent Form) algorithm.
- AbstractF2mPoints used for the
- WTNAF multiplication in
- {@link org.bouncycastle.math.ec.multiplier.WTauNafMultiplier.multiply()
- WTauNafMultiplier.multiply()}.
- - The exception extends InvalidCastException to enable users to have a single handling case, - only introducing specific handling of this one if required. -
-string pw_hash = BCrypt.HashPassword(plain_password);
-
- if (BCrypt.Verify(candidate_password, stored_hash))
- Console.WriteLine("It matches");
- else
- Console.WriteLine("It does not match");
-
-
- string strong_salt = BCrypt.GenerateSalt(10);
- string stronger_salt = BCrypt.GenerateSalt(12);
-
- -
- G(x) = x^4 + (a+1/a)x^3 + ax^2 + (a+1/a)x + 1 -- where a = primitive root of field generator 0x14D - -
- [JsonContainer(ItemConverterType = typeof(MyContainerConverter), ItemConverterParameters = new object[] { 123, "Four" })]
-
-
- [JsonContainer(NamingStrategyType = typeof(MyNamingStrategy), NamingStrategyParameters = new object[] { 123, "Four" })]
-
-
- [JsonProperty(ItemConverterType = typeof(MyContainerConverter), ItemConverterParameters = new object[] { 123, "Four" })]
-
-
- [JsonProperty(NamingStrategyType = typeof(MyNamingStrategy), NamingStrategyParameters = new object[] { 123, "Four" })]
-
-
- Public Sub InsertRow(myConnectionString As String)
- " If the connection string is null, use a default.
- If myConnectionString = "" Then
- myConnectionString = "Database=Test;Data Source=localhost;User Id=username;Password=pass"
- End If
- Dim myConnection As New MySqlConnection(myConnectionString)
- Dim myInsertQuery As String = "INSERT INTO Orders (id, customerId, amount) Values(1001, 23, 30.66)"
- Dim myCommand As New MySqlCommand(myInsertQuery)
- myCommand.Connection = myConnection
- myConnection.Open()
- myCommand.ExecuteNonQuery()
- myCommand.Connection.Close()
- End Sub
-
-
- public void InsertRow(string myConnectionString)
- {
- // If the connection string is null, use a default.
- if(myConnectionString == "")
- {
- myConnectionString = "Database=Test;Data Source=localhost;User Id=username;Password=pass";
- }
- MySqlConnection myConnection = new MySqlConnection(myConnectionString);
- string myInsertQuery = "INSERT INTO Orders (id, customerId, amount) Values(1001, 23, 30.66)";
- MySqlCommand myCommand = new MySqlCommand(myInsertQuery);
- myCommand.Connection = myConnection;
- myConnection.Open();
- myCommand.ExecuteNonQuery();
- myCommand.Connection.Close();
- }
-
-
- Public Sub CreateMySqlCommand()
- Dim myConnection As New MySqlConnection _
- ("Persist Security Info=False;database=test;server=myServer")
- myConnection.Open()
- Dim myTrans As MySqlTransaction = myConnection.BeginTransaction()
- Dim mySelectQuery As String = "SELECT * FROM MyTable"
- Dim myCommand As New MySqlCommand(mySelectQuery, myConnection, myTrans)
- myCommand.CommandTimeout = 20
- End Sub
-
-
- public void CreateMySqlCommand()
- {
- MySqlConnection myConnection = new MySqlConnection("Persist Security Info=False;
- database=test;server=myServer");
- myConnection.Open();
- MySqlTransaction myTrans = myConnection.BeginTransaction();
- string mySelectQuery = "SELECT * FROM myTable";
- MySqlCommand myCommand = new MySqlCommand(mySelectQuery, myConnection,myTrans);
- myCommand.CommandTimeout = 20;
- }
-
-
- public:
- void CreateMySqlCommand()
- {
- MySqlConnection* myConnection = new MySqlConnection(S"Persist Security Info=False;
- database=test;server=myServer");
- myConnection->Open();
- MySqlTransaction* myTrans = myConnection->BeginTransaction();
- String* mySelectQuery = S"SELECT * FROM myTable";
- MySqlCommand* myCommand = new MySqlCommand(mySelectQuery, myConnection, myTrans);
- myCommand->CommandTimeout = 20;
- };
-
-
- Public Sub CreateMySqlCommand()
- Dim myCommand As New MySqlCommand()
- myCommand.CommandType = CommandType.Text
- End Sub
-
-
- public void CreateMySqlCommand()
- {
- MySqlCommand myCommand = new MySqlCommand();
- myCommand.CommandType = CommandType.Text;
- }
-
-
- Public Sub CreateMySqlCommand()
- Dim sql as String = "SELECT * FROM mytable"
- Dim myCommand As New MySqlCommand(sql)
- myCommand.CommandType = CommandType.Text
- End Sub
-
-
- public void CreateMySqlCommand()
- {
- string sql = "SELECT * FROM mytable";
- MySqlCommand myCommand = new MySqlCommand(sql);
- myCommand.CommandType = CommandType.Text;
- }
-
-
- Public Sub CreateMySqlCommand()
- Dim conn as new MySqlConnection("server=myServer")
- Dim sql as String = "SELECT * FROM mytable"
- Dim myCommand As New MySqlCommand(sql, conn)
- myCommand.CommandType = CommandType.Text
- End Sub
-
-
- public void CreateMySqlCommand()
- {
- MySqlConnection conn = new MySqlConnection("server=myserver")
- string sql = "SELECT * FROM mytable";
- MySqlCommand myCommand = new MySqlCommand(sql, conn);
- myCommand.CommandType = CommandType.Text;
- }
-
-
- Public Sub CreateMySqlCommand()
- Dim conn as new MySqlConnection("server=myServer")
- conn.Open();
- Dim txn as MySqlTransaction = conn.BeginTransaction()
- Dim sql as String = "SELECT * FROM mytable"
- Dim myCommand As New MySqlCommand(sql, conn, txn)
- myCommand.CommandType = CommandType.Text
- End Sub
-
-
- public void CreateMySqlCommand()
- {
- MySqlConnection conn = new MySqlConnection("server=myserver")
- conn.Open();
- MySqlTransaction txn = conn.BeginTransaction();
- string sql = "SELECT * FROM mytable";
- MySqlCommand myCommand = new MySqlCommand(sql, conn, txn);
- myCommand.CommandType = CommandType.Text;
- }
-
-
- Public Sub CreateMySqlCommand()
- Dim myCommand As New MySqlCommand()
- myCommand.CommandText = "SELECT * FROM Mytable ORDER BY id"
- myCommand.CommandType = CommandType.Text
- End Sub
-
-
- public void CreateMySqlCommand()
- {
- MySqlCommand myCommand = new MySqlCommand();
- myCommand.CommandText = "SELECT * FROM mytable ORDER BY id";
- myCommand.CommandType = CommandType.Text;
- }
-
-
- Public Sub CreateMySqlCommand()
- Dim myCommand As New MySqlCommand()
- myCommand.CommandType = CommandType.Text
- End Sub
-
-
- public void CreateMySqlCommand()
- {
- MySqlCommand myCommand = new MySqlCommand();
- myCommand.CommandType = CommandType.Text;
- }
-
-
- Public Sub CreateMySqlCommand()
- Dim mySelectQuery As String = "SELECT * FROM mytable ORDER BY id"
- Dim myConnectString As String = "Persist Security Info=False;database=test;server=myServer"
- Dim myCommand As New MySqlCommand(mySelectQuery)
- myCommand.Connection = New MySqlConnection(myConnectString)
- myCommand.CommandType = CommandType.Text
- End Sub
-
-
- public void CreateMySqlCommand()
- {
- string mySelectQuery = "SELECT * FROM mytable ORDER BY id";
- string myConnectString = "Persist Security Info=False;database=test;server=myServer";
- MySqlCommand myCommand = new MySqlCommand(mySelectQuery);
- myCommand.Connection = new MySqlConnection(myConnectString);
- myCommand.CommandType = CommandType.Text;
- }
-
-
- Public Sub CreateMySqlCommand(myConnection As MySqlConnection, _
- mySelectQuery As String, myParamArray() As MySqlParameter)
- Dim myCommand As New MySqlCommand(mySelectQuery, myConnection)
- myCommand.CommandText = "SELECT id, name FROM mytable WHERE age=@age"
- myCommand.UpdatedRowSource = UpdateRowSource.Both
- myCommand.Parameters.Add(myParamArray)
- Dim j As Integer
- For j = 0 To myCommand.Parameters.Count - 1
- myCommand.Parameters.Add(myParamArray(j))
- Next j
- Dim myMessage As String = ""
- Dim i As Integer
- For i = 0 To myCommand.Parameters.Count - 1
- myMessage += myCommand.Parameters(i).ToString() & ControlChars.Cr
- Next i
- Console.WriteLine(myMessage)
- End Sub
-
-
- public void CreateMySqlCommand(MySqlConnection myConnection, string mySelectQuery,
- MySqlParameter[] myParamArray)
- {
- MySqlCommand myCommand = new MySqlCommand(mySelectQuery, myConnection);
- myCommand.CommandText = "SELECT id, name FROM mytable WHERE age=@age";
- myCommand.Parameters.Add(myParamArray);
- for (int j=0; j<myParamArray.Length; j++)
- {
- myCommand.Parameters.Add(myParamArray[j]) ;
- }
- string myMessage = "";
- for (int i = 0; i < myCommand.Parameters.Count; i++)
- {
- myMessage += myCommand.Parameters[i].ToString() + "\n";
- }
- MessageBox.Show(myMessage);
- }
-
-
- Public Sub CreateMySqlCommand(myExecuteQuery As String, myConnection As MySqlConnection)
- Dim myCommand As New MySqlCommand(myExecuteQuery, myConnection)
- myCommand.Connection.Open()
- myCommand.ExecuteNonQuery()
- myConnection.Close()
- End Sub
-
-
- public void CreateMySqlCommand(string myExecuteQuery, MySqlConnection myConnection)
- {
- MySqlCommand myCommand = new MySqlCommand(myExecuteQuery, myConnection);
- myCommand.Connection.Open();
- myCommand.ExecuteNonQuery();
- myConnection.Close();
- }
-
-
- Public Sub CreateMySqlDataReader(mySelectQuery As String, myConnection As MySqlConnection)
- Dim myCommand As New MySqlCommand(mySelectQuery, myConnection)
- myConnection.Open()
- Dim myReader As MySqlDataReader
- myReader = myCommand.ExecuteReader()
- Try
- While myReader.Read()
- Console.WriteLine(myReader.GetString(0))
- End While
- Finally
- myReader.Close
- myConnection.Close
- End Try
- End Sub
-
-
- public void CreateMySqlDataReader(string mySelectQuery, MySqlConnection myConnection)
- {
- MySqlCommand myCommand = new MySqlCommand(mySelectQuery, myConnection);
- myConnection.Open();
- MMySqlDataReader myReader;
- myReader = myCommand.ExecuteReader();
- try
- {
- while(myReader.Read())
- {
- Console.WriteLine(myReader.GetString(0));
- }
- }
- finally
- {
- myReader.Close();
- myConnection.Close();
- }
- }
-
-
- Public Sub CreateMySqlCommand(myScalarQuery As String, myConnection As MySqlConnection)
- Dim myCommand As New MySqlCommand(myScalarQuery, myConnection)
- myCommand.Connection.Open()
- myCommand.ExecuteScalar()
- myConnection.Close()
- End Sub
-
-
- public void CreateMySqlCommand(string myScalarQuery, MySqlConnection myConnection)
- {
- MySqlCommand myCommand = new MySqlCommand(myScalarQuery, myConnection);
- myCommand.Connection.Open();
- myCommand.ExecuteScalar();
- myConnection.Close();
- }
-
-
- public:
- void CreateMySqlCommand(String* myScalarQuery, MySqlConnection* myConnection)
- {
- MySqlCommand* myCommand = new MySqlCommand(myScalarQuery, myConnection);
- myCommand->Connection->Open();
- myCommand->ExecuteScalar();
- myConnection->Close();
- }
-
-
-
- public sub PrepareExample()
- Dim cmd as New MySqlCommand("INSERT INTO mytable VALUES (@val)", myConnection)
- cmd.Parameters.Add( "@val", 10 )
- cmd.Prepare()
- cmd.ExecuteNonQuery()
-
- cmd.Parameters(0).Value = 20
- cmd.ExecuteNonQuery()
- end sub
-
-
- private void PrepareExample()
- {
- MySqlCommand cmd = new MySqlCommand("INSERT INTO mytable VALUES (@val)", myConnection);
- cmd.Parameters.Add( "@val", 10 );
- cmd.Prepare();
- cmd.ExecuteNonQuery();
-
- cmd.Parameters[0].Value = 20;
- cmd.ExecuteNonQuery();
- }
-
-
-
- Public Sub InsertRow(myConnectionString As String)
- ' If the connection string is null, use a default.
- If myConnectionString = "" Then
- myConnectionString = "Database=Test;Data Source=localhost;User Id=username;Password=pass"
- End If
- Dim myConnection As New MySqlConnection(myConnectionString)
- Dim myInsertQuery As String = "INSERT INTO Orders (id, customerId, amount) Values(1001, 23, 30.66)"
- Dim myCommand As New MySqlCommand(myInsertQuery)
- myCommand.Connection = myConnection
- myConnection.Open()
- myCommand.ExecuteNonQuery()
- myCommand.Connection.Close()
- End Sub
-
-
-
-
- public void InsertRow(string myConnectionString)
- {
- // If the connection string is null, use a default.
- if(myConnectionString == "")
- {
- myConnectionString = "Database=Test;Data Source=localhost;User Id=username;Password=pass";
- }
- MySqlConnection myConnection = new MySqlConnection(myConnectionString);
- string myInsertQuery = "INSERT INTO Orders (id, customerId, amount) Values(1001, 23, 30.66)";
- MySqlCommand myCommand = new MySqlCommand(myInsertQuery);
- myCommand.Connection = myConnection;
- myConnection.Open();
- myCommand.ExecuteNonQuery();
- myCommand.Connection.Close();
- }
-
-
-
- Public Sub CreateSqlConnection()
- Dim myConnection As New MySqlConnection()
- myConnection.ConnectionString = "Persist Security Info=False;Username=user;Password=pass;database=test1;server=localhost;Connect Timeout=30"
- myConnection.Open()
- End Sub
-
-
- public void CreateSqlConnection()
- {
- MySqlConnection myConnection = new MySqlConnection();
- myConnection.ConnectionString = "Persist Security Info=False;Username=user;Password=pass;database=test1;server=localhost;Connect Timeout=30";
- myConnection.Open();
- }
-
-
- Public Sub CreateMySqlConnection()
- Dim myConnString As String = _
- "Persist Security Info=False;database=test;server=localhost;user id=joeuser;pwd=pass"
- Dim myConnection As New MySqlConnection( myConnString )
- myConnection.Open()
- MessageBox.Show( "Server Version: " + myConnection.ServerVersion _
- + ControlChars.NewLine + "Database: " + myConnection.Database )
- myConnection.ChangeDatabase( "test2" )
- MessageBox.Show( "ServerVersion: " + myConnection.ServerVersion _
- + ControlChars.NewLine + "Database: " + myConnection.Database )
- myConnection.Close()
- End Sub
-
-
-
- public void CreateMySqlConnection()
- {
- string myConnString =
- "Persist Security Info=False;database=test;server=localhost;user id=joeuser;pwd=pass";
- MySqlConnection myConnection = new MySqlConnection( myConnString );
- myConnection.Open();
- MessageBox.Show( "Server Version: " + myConnection.ServerVersion
- + "\nDatabase: " + myConnection.Database );
- myConnection.ChangeDatabase( "test2" );
- MessageBox.Show( "ServerVersion: " + myConnection.ServerVersion
- + "\nDatabase: " + myConnection.Database );
- myConnection.Close();
- }
-
-
- Public Sub CreateMySqlConnection(myConnString As String)
- Dim myConnection As New MySqlConnection(myConnString)
- myConnection.Open()
- MessageBox.Show("ServerVersion: " + myConnection.ServerVersion _
- + ControlChars.Cr + "State: " + myConnection.State.ToString())
- myConnection.Close()
- End Sub
-
-
- public void CreateMySqlConnection(string myConnString)
- {
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- myConnection.Open();
- MessageBox.Show("ServerVersion: " + myConnection.ServerVersion +
- "\nState: " + myConnection.State.ToString());
- myConnection.Close();
- }
-
-
- Public Sub CreateMySqlConnection(myConnString As String)
- Dim myConnection As New MySqlConnection(myConnString)
- myConnection.Open()
- MessageBox.Show("ServerVersion: " + myConnection.ServerVersion _
- + ControlChars.Cr + "State: " + myConnection.State.ToString())
- myConnection.Close()
- End Sub
-
-
- public void CreateMySqlConnection(string myConnString)
- {
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- myConnection.Open();
- MessageBox.Show("ServerVersion: " + myConnection.ServerVersion +
- "\nState: " + myConnection.State.ToString());
- myConnection.Close();
- }
-
- | Name | -Default | -Description | -
|---|---|---|
|
- Connect Timeout |
- 15 | -- The length of time (in seconds) to wait for a connection to the server before - terminating the attempt and generating an error. - | -
|
- Host |
- localhost | -
- |
-
| Port | -3306 | -- The port MySQL is using to listen for connections. This value is ignored if the connection protocol - is anything but socket. - | -
| Protocol | -socket | -
- Specifies the type of connection to make to the server. - pipe for a named pipe connection - unix for a Unix socket connection - memory to use MySQL shared memory - |
-
|
- CharSet |
- - | - Specifies the character set that should be used to encode all queries sent to the server. - Resultsets are still returned in the character set of the data returned. - | -
| Logging | -false | -When true, various pieces of information is output to any configured TraceListeners. | -
| Allow Batch | -true | -
- When true, multiple SQL statements can be sent with one command execution. - -Note- - Starting with MySQL 4.1.1, batch statements should be separated by the server-defined seperator character. - Commands sent to earlier versions of MySQL should be seperated with ';'. - |
-
| Encrypt | -false | -- When true, SSL/TLS encryption is used for all data sent between the - client and server if the server has a certificate installed. Recognized values - are true, false, yes, and no. - | -
|
- Initial Catalog |
- mysql | -The name of the database to use intially | -
|
- Password |
- - | The password for the MySQL account being used. | -
| Persist Security Info | -false | -- When set to false or no (strongly recommended), security-sensitive - information, such as the password, is not returned as part of the connection if - the connection is open or has ever been in an open state. Resetting the - connection string resets all connection string values including the password. - Recognized values are true, false, yes, and no. - | -
|
- User Id |
- - | The MySQL login account being used. | -
| Shared Memory Name | -MYSQL | -The name of the shared memory object to use for communication if the connection protocol is set to memory. | -
| Allow Zero Datetime | -false | -- True to have MySqlDataReader.GetValue() return a MySqlDateTime for date or datetime columns that have illegal values. - False will cause a DateTime object to be returned for legal values and an exception will be thrown for illegal values. - | -
| Convert Zero Datetime | -false | -- True to have MySqlDataReader.GetValue() and MySqlDataReader.GetDateTime() - return DateTime.MinValue for date or datetime columns that have illegal values. - | -
|
- Pipe Name |
- mysql | -
- When set to the name of a named pipe, the MySqlConnection will attempt to connect to MySQL
- on that named pipe. This settings only applies to the Windows platform. - |
-
|
- Use Performance Monitor |
- false | -- Posts performance data that can be tracked using perfmon - | -
| - Procedure Cache Size - | -25 | -- How many stored procedure definitions can be held in the cache - | -
| - Ignore Prepare - | -true | -- Instructs the provider to ignore any attempts to prepare commands. This option - was added to allow a user to disable prepared statements in an entire application - without modifying the code. A user might want to do this if errors or bugs are - encountered with MySQL prepared statements. - | -
| Use Procedure Bodies | -true | -- Instructs the provider to attempt to call the procedure without first resolving the metadata. This - is useful in situations where the calling user does not have access to the mysql.proc table. To - use this mode, the parameters for the procedure must be added to the command in the same order - as they appear in the procedure definition and their types must be explicitly set. - | -
| Auto Enlist | -true | -- Indicates whether the connection should automatically enlist in the current transaction, - if there is one. - | -
| Respect Binary Flags | -true | -- Indicates whether the connection should respect all binary flags sent to the client - as part of column metadata. False will cause the connector to behave like - Connector/NET 5.0 and earlier. - | -
| BlobAsUTF8IncludePattern | -null | -- Pattern that should be used to indicate which blob columns should be treated as UTF-8. - | -
| BlobAsUTF8ExcludePattern | -null | -- Pattern that should be used to indicate which blob columns should not be treated as UTF-8. - | -
| Default Command Timeout | -30 | -- The default timeout that new MySqlCommand objects will use unless changed. - | -
| Allow User Variables | -false | -- Should the provider expect user variables in the SQL. - | -
| Interactive -or- Interactive Session | -false | -- Should this session be considered interactive? - | -
| Functions Return String | -false | -- Set this option to true to force the return value of SQL functions to be string. - | -
| Use Affected Rows | -false | -- Set this option to true to cause the affected rows reported to reflect only the - rows that are actually changed. By default, the number of rows that are matched - is returned. - | -
| Name | -Default | -Description | -
|---|---|---|
| Connection Lifetime | -0 | -
- When a connection is returned to the pool, its creation time is compared with
- the current time, and the connection is destroyed if that time span (in seconds)
- exceeds the value specified by Connection Lifetime. This is useful in
- clustered configurations to force load balancing between a running server and a
- server just brought online.
- |
-
| Max Pool Size | -100 | -The maximum number of connections allowed in the pool. | -
| Min Pool Size | -0 | -The minimum number of connections allowed in the pool. | -
| Pooling | -true | -- When true, the MySqlConnection object is drawn from the appropriate - pool, or if necessary, is created and added to the appropriate pool. Recognized - values are true, false, yes, and no. - | -
| Connection Reset | -false | -- Specifies whether the database connection should be reset when being - drawn from the pool. Leaving this as false will yeild much faster - connection opens but the user should understand the side effects - of doing this such as temporary tables and user variables from the previous - session not being cleared out. - | -
| Cache Server Properties | -false | -- Specifies whether the server variables are cached between pooled connections. - On systems where the variables change infrequently and there are lots of - connection attempts, this can speed up things dramatically. - | -
- Public Sub CreateConnection()
- Dim myConnection As New MySqlConnection()
- myConnection.ConnectionString = "Persist Security Info=False;database=myDB;server=myHost;Connect Timeout=30;user id=myUser; pwd=myPass"
- myConnection.Open()
- End Sub 'CreateConnection
-
-
- public void CreateConnection()
- {
- MySqlConnection myConnection = new MySqlConnection();
- myConnection.ConnectionString = "Persist Security Info=False;database=myDB;server=myHost;Connect Timeout=30;user id=myUser; pwd=myPass";
- myConnection.Open();
- }
-
-
- Public Sub CreateConnection()
- Dim myConnection As New MySqlConnection()
- myConnection.ConnectionString = "database=myDB;server=/var/lib/mysql/mysql.sock;user id=myUser; pwd=myPass"
- myConnection.Open()
- End Sub 'CreateConnection
-
-
- public void CreateConnection()
- {
- MySqlConnection myConnection = new MySqlConnection();
- myConnection.ConnectionString = "database=myDB;server=/var/lib/mysql/mysql.sock;user id=myUser; pwd=myPass";
- myConnection.Open();
- }
-
-
- Public Sub RunTransaction(myConnString As String)
- Dim myConnection As New MySqlConnection(myConnString)
- myConnection.Open()
-
- Dim myCommand As MySqlCommand = myConnection.CreateCommand()
- Dim myTrans As MySqlTransaction
-
- ' Start a local transaction
- myTrans = myConnection.BeginTransaction()
- ' Must assign both transaction object and connection
- ' to Command object for a pending local transaction
- myCommand.Connection = myConnection
- myCommand.Transaction = myTrans
-
- Try
- myCommand.CommandText = "Insert into Test (id, desc) VALUES (100, 'Description')"
- myCommand.ExecuteNonQuery()
- myCommand.CommandText = "Insert into Test (id, desc) VALUES (101, 'Description')"
- myCommand.ExecuteNonQuery()
- myTrans.Commit()
- Console.WriteLine("Both records are written to database.")
- Catch e As Exception
- Try
- myTrans.Rollback()
- Catch ex As MySqlException
- If Not myTrans.Connection Is Nothing Then
- Console.WriteLine("An exception of type " + ex.GetType().ToString() + _
- " was encountered while attempting to roll back the transaction.")
- End If
- End Try
-
- Console.WriteLine("An exception of type " + e.GetType().ToString() + _
- "was encountered while inserting the data.")
- Console.WriteLine("Neither record was written to database.")
- Finally
- myConnection.Close()
- End Try
- End Sub
-
-
- public void RunTransaction(string myConnString)
- {
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- myConnection.Open();
-
- MySqlCommand myCommand = myConnection.CreateCommand();
- MySqlTransaction myTrans;
-
- // Start a local transaction
- myTrans = myConnection.BeginTransaction();
- // Must assign both transaction object and connection
- // to Command object for a pending local transaction
- myCommand.Connection = myConnection;
- myCommand.Transaction = myTrans;
-
- try
- {
- myCommand.CommandText = "insert into Test (id, desc) VALUES (100, 'Description')";
- myCommand.ExecuteNonQuery();
- myCommand.CommandText = "insert into Test (id, desc) VALUES (101, 'Description')";
- myCommand.ExecuteNonQuery();
- myTrans.Commit();
- Console.WriteLine("Both records are written to database.");
- }
- catch(Exception e)
- {
- try
- {
- myTrans.Rollback();
- }
- catch (SqlException ex)
- {
- if (myTrans.Connection != null)
- {
- Console.WriteLine("An exception of type " + ex.GetType() +
- " was encountered while attempting to roll back the transaction.");
- }
- }
-
- Console.WriteLine("An exception of type " + e.GetType() +
- " was encountered while inserting the data.");
- Console.WriteLine("Neither record was written to database.");
- }
- finally
- {
- myConnection.Close();
- }
- }
-
-
- Public Sub RunTransaction(myConnString As String)
- Dim myConnection As New MySqlConnection(myConnString)
- myConnection.Open()
-
- Dim myCommand As MySqlCommand = myConnection.CreateCommand()
- Dim myTrans As MySqlTransaction
-
- ' Start a local transaction
- myTrans = myConnection.BeginTransaction()
- ' Must assign both transaction object and connection
- ' to Command object for a pending local transaction
- myCommand.Connection = myConnection
- myCommand.Transaction = myTrans
-
- Try
- myCommand.CommandText = "Insert into Test (id, desc) VALUES (100, 'Description')"
- myCommand.ExecuteNonQuery()
- myCommand.CommandText = "Insert into Test (id, desc) VALUES (101, 'Description')"
- myCommand.ExecuteNonQuery()
- myTrans.Commit()
- Console.WriteLine("Both records are written to database.")
- Catch e As Exception
- Try
- myTrans.Rollback()
- Catch ex As MySqlException
- If Not myTrans.Connection Is Nothing Then
- Console.WriteLine("An exception of type " + ex.GetType().ToString() + _
- " was encountered while attempting to roll back the transaction.")
- End If
- End Try
-
- Console.WriteLine("An exception of type " + e.GetType().ToString() + _
- "was encountered while inserting the data.")
- Console.WriteLine("Neither record was written to database.")
- Finally
- myConnection.Close()
- End Try
- End Sub
-
-
- public void RunTransaction(string myConnString)
- {
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- myConnection.Open();
-
- MySqlCommand myCommand = myConnection.CreateCommand();
- MySqlTransaction myTrans;
-
- // Start a local transaction
- myTrans = myConnection.BeginTransaction();
- // Must assign both transaction object and connection
- // to Command object for a pending local transaction
- myCommand.Connection = myConnection;
- myCommand.Transaction = myTrans;
-
- try
- {
- myCommand.CommandText = "insert into Test (id, desc) VALUES (100, 'Description')";
- myCommand.ExecuteNonQuery();
- myCommand.CommandText = "insert into Test (id, desc) VALUES (101, 'Description')";
- myCommand.ExecuteNonQuery();
- myTrans.Commit();
- Console.WriteLine("Both records are written to database.");
- }
- catch(Exception e)
- {
- try
- {
- myTrans.Rollback();
- }
- catch (SqlException ex)
- {
- if (myTrans.Connection != null)
- {
- Console.WriteLine("An exception of type " + ex.GetType() +
- " was encountered while attempting to roll back the transaction.");
- }
- }
-
- Console.WriteLine("An exception of type " + e.GetType() +
- " was encountered while inserting the data.");
- Console.WriteLine("Neither record was written to database.");
- }
- finally
- {
- myConnection.Close();
- }
- }
-
-
- Public Sub CreateMySqlConnection()
- Dim myConnString As String = _
- "Persist Security Info=False;database=test;server=localhost;user id=joeuser;pwd=pass"
- Dim myConnection As New MySqlConnection( myConnString )
- myConnection.Open()
- MessageBox.Show( "Server Version: " + myConnection.ServerVersion _
- + ControlChars.NewLine + "Database: " + myConnection.Database )
- myConnection.ChangeDatabase( "test2" )
- MessageBox.Show( "ServerVersion: " + myConnection.ServerVersion _
- + ControlChars.NewLine + "Database: " + myConnection.Database )
- myConnection.Close()
- End Sub
-
-
-
- public void CreateMySqlConnection()
- {
- string myConnString =
- "Persist Security Info=False;database=test;server=localhost;user id=joeuser;pwd=pass";
- MySqlConnection myConnection = new MySqlConnection( myConnString );
- myConnection.Open();
- MessageBox.Show( "Server Version: " + myConnection.ServerVersion
- + "\nDatabase: " + myConnection.Database );
- myConnection.ChangeDatabase( "test2" );
- MessageBox.Show( "ServerVersion: " + myConnection.ServerVersion
- + "\nDatabase: " + myConnection.Database );
- myConnection.Close();
- }
-
-
- Public Sub CreateMySqlConnection(myConnString As String)
- Dim myConnection As New MySqlConnection(myConnString)
- myConnection.Open()
- MessageBox.Show("ServerVersion: " + myConnection.ServerVersion _
- + ControlChars.Cr + "State: " + myConnection.State.ToString())
- myConnection.Close()
- End Sub
-
-
- public void CreateMySqlConnection(string myConnString)
- {
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- myConnection.Open();
- MessageBox.Show("ServerVersion: " + myConnection.ServerVersion +
- "\nState: " + myConnection.State.ToString());
- myConnection.Close();
- }
-
-
- Public Sub CreateMySqlConnection(myConnString As String)
- Dim myConnection As New MySqlConnection(myConnString)
- myConnection.Open()
- MessageBox.Show("ServerVersion: " + myConnection.ServerVersion _
- + ControlChars.Cr + "State: " + myConnection.State.ToString())
- myConnection.Close()
- End Sub
-
-
- public void CreateMySqlConnection(string myConnString)
- {
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- myConnection.Open();
- MessageBox.Show("ServerVersion: " + myConnection.ServerVersion +
- "\nState: " + myConnection.State.ToString());
- myConnection.Close();
- }
-
-
- Public Sub ReadMyData(myConnString As String)
- Dim mySelectQuery As String = "SELECT OrderID, CustomerID FROM Orders"
- Dim myConnection As New MySqlConnection(myConnString)
- Dim myCommand As New MySqlCommand(mySelectQuery, myConnection)
- myConnection.Open()
- Dim myReader As MySqlDataReader
- myReader = myCommand.ExecuteReader()
- ' Always call Read before accessing data.
- While myReader.Read()
- Console.WriteLine((myReader.GetInt32(0) & ", " & myReader.GetString(1)))
- End While
- ' always call Close when done reading.
- myReader.Close()
- ' Close the connection when done with it.
- myConnection.Close()
- End Sub 'ReadMyData
-
-
- public void ReadMyData(string myConnString) {
- string mySelectQuery = "SELECT OrderID, CustomerID FROM Orders";
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- MySqlCommand myCommand = new MySqlCommand(mySelectQuery,myConnection);
- myConnection.Open();
- MySqlDataReader myReader;
- myReader = myCommand.ExecuteReader();
- // Always call Read before accessing data.
- while (myReader.Read()) {
- Console.WriteLine(myReader.GetInt32(0) + ", " + myReader.GetString(1));
- }
- // always call Close when done reading.
- myReader.Close();
- // Close the connection when done with it.
- myConnection.Close();
- }
-
-
- Public Sub ShowException()
- Dim mySelectQuery As String = "SELECT column1 FROM table1"
- Dim myConnection As New MySqlConnection ("Data Source=localhost;Database=Sample;")
- Dim myCommand As New MySqlCommand(mySelectQuery, myConnection)
-
- Try
- myCommand.Connection.Open()
- Catch e As MySqlException
- MessageBox.Show( e.Message )
- End Try
- End Sub
-
-
- public void ShowException()
- {
- string mySelectQuery = "SELECT column1 FROM table1";
- MySqlConnection myConnection =
- new MySqlConnection("Data Source=localhost;Database=Sample;");
- MySqlCommand myCommand = new MySqlCommand(mySelectQuery,myConnection);
-
- try
- {
- myCommand.Connection.Open();
- }
- catch (MySqlException e)
- {
- MessageBox.Show( e.Message );
- }
- }
-
-
- Public Shared Function SelectRows(myConnection As String, mySelectQuery As String, myTableName As String) As DataSet
- Dim myConn As New MySqlConnection(myConnection)
- Dim myDataAdapter As New MySqlDataAdapter()
- myDataAdapter.SelectCommand = New MySqlCommand(mySelectQuery, myConn)
- Dim cb As SqlCommandBuilder = New MySqlCommandBuilder(myDataAdapter)
-
- myConn.Open()
-
- Dim ds As DataSet = New DataSet
- myDataAdapter.Fill(ds, myTableName)
-
- ' Code to modify data in DataSet here
-
- ' Without the MySqlCommandBuilder this line would fail.
- myDataAdapter.Update(ds, myTableName)
-
- myConn.Close()
- End Function 'SelectRows
-
-
- public static DataSet SelectRows(string myConnection, string mySelectQuery, string myTableName)
- {
- MySqlConnection myConn = new MySqlConnection(myConnection);
- MySqlDataAdapter myDataAdapter = new MySqlDataAdapter();
- myDataAdapter.SelectCommand = new MySqlCommand(mySelectQuery, myConn);
- MySqlCommandBuilder cb = new MySqlCommandBuilder(myDataAdapter);
-
- myConn.Open();
-
- DataSet ds = new DataSet();
- myDataAdapter.Fill(ds, myTableName);
-
- //code to modify data in DataSet here
-
- //Without the MySqlCommandBuilder this line would fail
- myDataAdapter.Update(ds, myTableName);
-
- myConn.Close();
-
- return ds;
- }
-
-
-
- Public Function SelectRows(dataSet As DataSet, connection As String, query As String) As DataSet
- Dim conn As New MySqlConnection(connection)
- Dim adapter As New MySqlDataAdapter()
- adapter.SelectCommand = new MySqlCommand(query, conn)
- adapter.Fill(dataset)
- Return dataset
- End Function
-
-
- public DataSet SelectRows(DataSet dataset,string connection,string query)
- {
- MySqlConnection conn = new MySqlConnection(connection);
- MySqlDataAdapter adapter = new MySqlDataAdapter();
- adapter.SelectCommand = new MySqlCommand(query, conn);
- adapter.Fill(dataset);
- return dataset;
- }
-
-
- Public Sub CreateSqlDataAdapter()
- Dim conn As MySqlConnection = New MySqlConnection("Data Source=localhost;" & _
- "database=test")
- Dim da As MySqlDataAdapter = New MySqlDataAdapter
- da.MissingSchemaAction = MissingSchemaAction.AddWithKey
-
- da.SelectCommand = New MySqlCommand("SELECT id, name FROM mytable", conn)
- da.InsertCommand = New MySqlCommand("INSERT INTO mytable (id, name) " & _
- "VALUES (@id, @name)", conn)
- da.UpdateCommand = New MySqlCommand("UPDATE mytable SET id=@id, name=@name " & _
- "WHERE id=@oldId", conn)
- da.DeleteCommand = New MySqlCommand("DELETE FROM mytable WHERE id=@id", conn)
-
- da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
- da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
-
- da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
- da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
- da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
-
- da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
- End Sub
-
-
- public static void CreateSqlDataAdapter()
- {
- MySqlConnection conn = new MySqlConnection("Data Source=localhost;database=test");
- MySqlDataAdapter da = new MySqlDataAdapter();
- da.MissingSchemaAction = MissingSchemaAction.AddWithKey;
-
- da.SelectCommand = new MySqlCommand("SELECT id, name FROM mytable", conn);
- da.InsertCommand = new MySqlCommand("INSERT INTO mytable (id, name) " +
- "VALUES (@id, @name)", conn);
- da.UpdateCommand = new MySqlCommand("UPDATE mytable SET id=@id, name=@name " +
- "WHERE id=@oldId", conn);
- da.DeleteCommand = new MySqlCommand("DELETE FROM mytable WHERE id=@id", conn);
-
- da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
- da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
-
- da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
- da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
- da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
-
- da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
- }
-
-
- Public Sub CreateSqlDataAdapter()
- Dim conn As MySqlConnection = New MySqlConnection("Data Source=localhost;" & _
- "database=test")
- Dim cmd as new MySqlCommand("SELECT id, name FROM mytable", conn)
- Dim da As MySqlDataAdapter = New MySqlDataAdapter(cmd)
- da.MissingSchemaAction = MissingSchemaAction.AddWithKey
-
- da.InsertCommand = New MySqlCommand("INSERT INTO mytable (id, name) " & _
- "VALUES (@id, @name)", conn)
- da.UpdateCommand = New MySqlCommand("UPDATE mytable SET id=@id, name=@name " & _
- "WHERE id=@oldId", conn)
- da.DeleteCommand = New MySqlCommand("DELETE FROM mytable WHERE id=@id", conn)
-
- da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
- da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
-
- da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
- da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
- da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
-
- da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
- End Sub
-
-
- public static void CreateSqlDataAdapter()
- {
- MySqlConnection conn = new MySqlConnection("Data Source=localhost;database=test");
- MySqlCommand cmd = new MySqlCommand("SELECT id, name FROM mytable", conn);
- MySqlDataAdapter da = new MySqlDataAdapter(cmd);
- da.MissingSchemaAction = MissingSchemaAction.AddWithKey;
-
- da.InsertCommand = new MySqlCommand("INSERT INTO mytable (id, name) " +
- "VALUES (@id, @name)", conn);
- da.UpdateCommand = new MySqlCommand("UPDATE mytable SET id=@id, name=@name " +
- "WHERE id=@oldId", conn);
- da.DeleteCommand = new MySqlCommand("DELETE FROM mytable WHERE id=@id", conn);
-
- da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
- da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
-
- da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
- da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
- da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
-
- da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
- }
-
-
- Public Sub CreateSqlDataAdapter()
- Dim conn As MySqlConnection = New MySqlConnection("Data Source=localhost;" & _
- "database=test")
- Dim da As MySqlDataAdapter = New MySqlDataAdapter("SELECT id, name FROM mytable", conn)
- da.MissingSchemaAction = MissingSchemaAction.AddWithKey
-
- da.InsertCommand = New MySqlCommand("INSERT INTO mytable (id, name) " & _
- "VALUES (@id, @name)", conn)
- da.UpdateCommand = New MySqlCommand("UPDATE mytable SET id=@id, name=@name " & _
- "WHERE id=@oldId", conn)
- da.DeleteCommand = New MySqlCommand("DELETE FROM mytable WHERE id=@id", conn)
-
- da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
- da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
-
- da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
- da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
- da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
-
- da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
- End Sub
-
-
- public static void CreateSqlDataAdapter()
- {
- MySqlConnection conn = new MySqlConnection("Data Source=localhost;database=test");
- MySqlDataAdapter da = new MySqlDataAdapter("SELECT id, name FROM mytable", conn);
- da.MissingSchemaAction = MissingSchemaAction.AddWithKey;
-
- da.InsertCommand = new MySqlCommand("INSERT INTO mytable (id, name) " +
- "VALUES (@id, @name)", conn);
- da.UpdateCommand = new MySqlCommand("UPDATE mytable SET id=@id, name=@name " +
- "WHERE id=@oldId", conn);
- da.DeleteCommand = new MySqlCommand("DELETE FROM mytable WHERE id=@id", conn);
-
- da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
- da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
-
- da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
- da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
- da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
-
- da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
- }
-
-
- Public Sub CreateSqlDataAdapter()
- Dim da As MySqlDataAdapter = New MySqlDataAdapter("SELECT id, name FROM mytable", "Data Source=localhost;database=test")
- Dim conn As MySqlConnection = da.SelectCommand.Connection
- da.MissingSchemaAction = MissingSchemaAction.AddWithKey
-
- da.InsertCommand = New MySqlCommand("INSERT INTO mytable (id, name) " & _
- "VALUES (@id, @name)", conn)
- da.UpdateCommand = New MySqlCommand("UPDATE mytable SET id=@id, name=@name " & _
- "WHERE id=@oldId", conn)
- da.DeleteCommand = New MySqlCommand("DELETE FROM mytable WHERE id=@id", conn)
-
- da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
- da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
-
- da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
- da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
- da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
-
- da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
- End Sub
-
-
- public static void CreateSqlDataAdapter()
- {
- MySqlDataAdapter da = new MySqlDataAdapter("SELECT id, name FROM mytable", "Data Source=localhost;database=test");
- MySqlConnection conn = da.SelectCommand.Connection;
- da.MissingSchemaAction = MissingSchemaAction.AddWithKey;
-
- da.InsertCommand = new MySqlCommand("INSERT INTO mytable (id, name) " +
- "VALUES (@id, @name)", conn);
- da.UpdateCommand = new MySqlCommand("UPDATE mytable SET id=@id, name=@name " +
- "WHERE id=@oldId", conn);
- da.DeleteCommand = new MySqlCommand("DELETE FROM mytable WHERE id=@id", conn);
-
- da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
- da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
-
- da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
- da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
- da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
-
- da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
- }
-
-
- Public Shared Function CreateCustomerAdapter(conn As MySqlConnection) As MySqlDataAdapter
-
- Dim da As MySqlDataAdapter = New MySqlDataAdapter()
- Dim cmd As MySqlCommand
- Dim parm As MySqlParameter
-
- ' Create the SelectCommand.
- cmd = New MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn)
-
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15)
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15)
-
- da.SelectCommand = cmd
-
- ' Create the DeleteCommand.
- cmd = New MySqlCommand("DELETE FROM mytable WHERE id=@id", conn)
-
- parm = cmd.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
- parm.SourceVersion = DataRowVersion.Original
-
- da.DeleteCommand = cmd
-
- Return da
- End Function
-
-
- public static MySqlDataAdapter CreateCustomerAdapter(MySqlConnection conn)
- {
- MySqlDataAdapter da = new MySqlDataAdapter();
- MySqlCommand cmd;
- MySqlParameter parm;
-
- // Create the SelectCommand.
- cmd = new MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn);
-
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15);
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15);
-
- da.SelectCommand = cmd;
-
- // Create the DeleteCommand.
- cmd = new MySqlCommand("DELETE FROM mytable WHERE id=@id", conn);
-
- parm = cmd.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
- parm.SourceVersion = DataRowVersion.Original;
-
- da.DeleteCommand = cmd;
-
- return da;
- }
-
-
- Public Shared Function CreateCustomerAdapter(conn As MySqlConnection) As MySqlDataAdapter
-
- Dim da As MySqlDataAdapter = New MySqlDataAdapter()
- Dim cmd As MySqlCommand
- Dim parm As MySqlParameter
-
- ' Create the SelectCommand.
- cmd = New MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn)
-
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15)
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15)
-
- da.SelectCommand = cmd
-
- ' Create the InsertCommand.
- cmd = New MySqlCommand("INSERT INTO mytable (id,name) VALUES (@id, @name)", conn)
-
- cmd.Parameters.Add( "@id", MySqlDbType.VarChar, 15, "id" )
- cmd.Parameters.Add( "@name", MySqlDbType.VarChar, 15, "name" )
- da.InsertCommand = cmd
-
- Return da
- End Function
-
-
- public static MySqlDataAdapter CreateCustomerAdapter(MySqlConnection conn)
- {
- MySqlDataAdapter da = new MySqlDataAdapter();
- MySqlCommand cmd;
- MySqlParameter parm;
-
- // Create the SelectCommand.
- cmd = new MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn);
-
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15);
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15);
-
- da.SelectCommand = cmd;
-
- // Create the InsertCommand.
- cmd = new MySqlCommand("INSERT INTO mytable (id,name) VALUES (@id,@name)", conn);
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15, "id" );
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15, "name" );
-
- da.InsertCommand = cmd;
-
- return da;
- }
-
-
- Public Shared Function CreateCustomerAdapter(conn As MySqlConnection) As MySqlDataAdapter
-
- Dim da As MySqlDataAdapter = New MySqlDataAdapter()
- Dim cmd As MySqlCommand
- Dim parm As MySqlParameter
-
- ' Create the SelectCommand.
- cmd = New MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn)
-
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15)
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15)
-
- da.SelectCommand = cmd
-
- ' Create the InsertCommand.
- cmd = New MySqlCommand("INSERT INTO mytable (id,name) VALUES (@id, @name)", conn)
-
- cmd.Parameters.Add( "@id", MySqlDbType.VarChar, 15, "id" )
- cmd.Parameters.Add( "@name", MySqlDbType.VarChar, 15, "name" )
- da.InsertCommand = cmd
-
- Return da
- End Function
-
-
- public static MySqlDataAdapter CreateCustomerAdapter(MySqlConnection conn)
- {
- MySqlDataAdapter da = new MySqlDataAdapter();
- MySqlCommand cmd;
- MySqlParameter parm;
-
- // Create the SelectCommand.
- cmd = new MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn);
-
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15);
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15);
-
- da.SelectCommand = cmd;
-
- // Create the InsertCommand.
- cmd = new MySqlCommand("INSERT INTO mytable (id,name) VALUES (@id,@name)", conn);
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15, "id" );
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15, "name" );
-
- da.InsertCommand = cmd;
-
- return da;
- }
-
-
- Public Shared Function CreateCustomerAdapter(conn As MySqlConnection) As MySqlDataAdapter
-
- Dim da As MySqlDataAdapter = New MySqlDataAdapter()
- Dim cmd As MySqlCommand
- Dim parm As MySqlParameter
-
- ' Create the SelectCommand.
- cmd = New MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn)
-
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15)
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15)
-
- da.SelectCommand = cmd
-
- ' Create the UpdateCommand.
- cmd = New MySqlCommand("UPDATE mytable SET id=@id, name=@name WHERE id=@oldId", conn)
-
- cmd.Parameters.Add( "@id", MySqlDbType.VarChar, 15, "id" )
- cmd.Parameters.Add( "@name", MySqlDbType.VarChar, 15, "name" )
-
- parm = cmd.Parameters.Add("@oldId", MySqlDbType.VarChar, 15, "id")
- parm.SourceVersion = DataRowVersion.Original
-
- da.UpdateCommand = cmd
-
- Return da
- End Function
-
-
- public static MySqlDataAdapter CreateCustomerAdapter(MySqlConnection conn)
- {
- MySqlDataAdapter da = new MySqlDataAdapter();
- MySqlCommand cmd;
- MySqlParameter parm;
-
- // Create the SelectCommand.
- cmd = new MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn);
-
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15);
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15);
-
- da.SelectCommand = cmd;
-
- // Create the UpdateCommand.
- cmd = new MySqlCommand("UPDATE mytable SET id=@id, name=@name WHERE id=@oldId", conn);
- cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15, "id" );
- cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15, "name" );
-
- parm = cmd.Parameters.Add( "@oldId", MySqlDbType.VarChar, 15, "id" );
- parm.SourceVersion = DataRowVersion.Original;
-
- da.UpdateCommand = cmd;
-
- return da;
- }
-
-
- Public Sub AddParameters()
- ' ...
- ' create myDataSet and myDataAdapter
- ' ...
- myDataAdapter.SelectCommand.Parameters.Add("@CategoryName", MySqlDbType.VarChar, 80).Value = "toasters"
- myDataAdapter.SelectCommand.Parameters.Add("@SerialNum", MySqlDbType.Long).Value = 239
-
- myDataAdapter.Fill(myDataSet)
- End Sub 'AddSqlParameters
-
-
- public void AddSqlParameters()
- {
- // ...
- // create myDataSet and myDataAdapter
- // ...
-
- myDataAdapter.SelectCommand.Parameters.Add("@CategoryName", MySqlDbType.VarChar, 80).Value = "toasters";
- myDataAdapter.SelectCommand.Parameters.Add("@SerialNum", MySqlDbType.Long).Value = 239;
- myDataAdapter.Fill(myDataSet);
-
- }
-
-
- Public Sub RunTransaction(myConnString As String)
- Dim myConnection As New MySqlConnection(myConnString)
- myConnection.Open()
-
- Dim myCommand As MySqlCommand = myConnection.CreateCommand()
- Dim myTrans As MySqlTransaction
-
- ' Start a local transaction
- myTrans = myConnection.BeginTransaction()
- ' Must assign both transaction object and connection
- ' to Command object for a pending local transaction
- myCommand.Connection = myConnection
- myCommand.Transaction = myTrans
-
- Try
- myCommand.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')"
- myCommand.ExecuteNonQuery()
- myCommand.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')"
- myCommand.ExecuteNonQuery()
- myTrans.Commit()
- Console.WriteLine("Both records are written to database.")
- Catch e As Exception
- Try
- myTrans.Rollback()
- Catch ex As MySqlException
- If Not myTrans.Connection Is Nothing Then
- Console.WriteLine("An exception of type " & ex.GetType().ToString() & _
- " was encountered while attempting to roll back the transaction.")
- End If
- End Try
-
- Console.WriteLine("An exception of type " & e.GetType().ToString() & _
- "was encountered while inserting the data.")
- Console.WriteLine("Neither record was written to database.")
- Finally
- myConnection.Close()
- End Try
- End Sub 'RunTransaction
-
-
- public void RunTransaction(string myConnString)
- {
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- myConnection.Open();
-
- MySqlCommand myCommand = myConnection.CreateCommand();
- MySqlTransaction myTrans;
-
- // Start a local transaction
- myTrans = myConnection.BeginTransaction();
- // Must assign both transaction object and connection
- // to Command object for a pending local transaction
- myCommand.Connection = myConnection;
- myCommand.Transaction = myTrans;
-
- try
- {
- myCommand.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')";
- myCommand.ExecuteNonQuery();
- myCommand.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')";
- myCommand.ExecuteNonQuery();
- myTrans.Commit();
- Console.WriteLine("Both records are written to database.");
- }
- catch(Exception e)
- {
- try
- {
- myTrans.Rollback();
- }
- catch (MySqlException ex)
- {
- if (myTrans.Connection != null)
- {
- Console.WriteLine("An exception of type " + ex.GetType() +
- " was encountered while attempting to roll back the transaction.");
- }
- }
-
- Console.WriteLine("An exception of type " + e.GetType() +
- " was encountered while inserting the data.");
- Console.WriteLine("Neither record was written to database.");
- }
- finally
- {
- myConnection.Close();
- }
- }
-
-
- Public Sub RunSqlTransaction(myConnString As String)
- Dim myConnection As New MySqlConnection(myConnString)
- myConnection.Open()
-
- Dim myCommand As MySqlCommand = myConnection.CreateCommand()
- Dim myTrans As MySqlTransaction
-
- ' Start a local transaction
- myTrans = myConnection.BeginTransaction()
-
- ' Must assign both transaction object and connection
- ' to Command object for a pending local transaction
- myCommand.Connection = myConnection
- myCommand.Transaction = myTrans
-
- Try
- myCommand.CommandText = "Insert into mytable (id, desc) VALUES (100, 'Description')"
- myCommand.ExecuteNonQuery()
- myCommand.CommandText = "Insert into mytable (id, desc) VALUES (101, 'Description')"
- myCommand.ExecuteNonQuery()
- myTrans.Commit()
- Console.WriteLine("Success.")
- Catch e As Exception
- Try
- myTrans.Rollback()
- Catch ex As MySqlException
- If Not myTrans.Connection Is Nothing Then
- Console.WriteLine("An exception of type " & ex.GetType().ToString() & _
- " was encountered while attempting to roll back the transaction.")
- End If
- End Try
-
- Console.WriteLine("An exception of type " & e.GetType().ToString() & _
- "was encountered while inserting the data.")
- Console.WriteLine("Neither record was written to database.")
- Finally
- myConnection.Close()
- End Try
- End Sub
-
-
- public void RunSqlTransaction(string myConnString)
- {
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- myConnection.Open();
-
- MySqlCommand myCommand = myConnection.CreateCommand();
- MySqlTransaction myTrans;
-
- // Start a local transaction
- myTrans = myConnection.BeginTransaction();
- // Must assign both transaction object and connection
- // to Command object for a pending local transaction
- myCommand.Connection = myConnection;
- myCommand.Transaction = myTrans;
-
- try
- {
- myCommand.CommandText = "Insert into mytable (id, desc) VALUES (100, 'Description')";
- myCommand.ExecuteNonQuery();
- myCommand.CommandText = "Insert into mytable (id, desc) VALUES (101, 'Description')";
- myCommand.ExecuteNonQuery();
- myTrans.Commit();
- Console.WriteLine("Both records are written to database.");
- }
- catch(Exception e)
- {
- try
- {
- myTrans.Rollback();
- }
- catch (MySqlException ex)
- {
- if (myTrans.Connection != null)
- {
- Console.WriteLine("An exception of type " + ex.GetType() +
- " was encountered while attempting to roll back the transaction.");
- }
- }
-
- Console.WriteLine("An exception of type " + e.GetType() +
- " was encountered while inserting the data.");
- Console.WriteLine("Neither record was written to database.");
- }
- finally
- {
- myConnection.Close();
- }
- }
-
-
- Public Sub RunSqlTransaction(myConnString As String)
- Dim myConnection As New MySqlConnection(myConnString)
- myConnection.Open()
-
- Dim myCommand As MySqlCommand = myConnection.CreateCommand()
- Dim myTrans As MySqlTransaction
-
- ' Start a local transaction
- myTrans = myConnection.BeginTransaction()
-
- ' Must assign both transaction object and connection
- ' to Command object for a pending local transaction
- myCommand.Connection = myConnection
- myCommand.Transaction = myTrans
-
- Try
- myCommand.CommandText = "Insert into mytable (id, desc) VALUES (100, 'Description')"
- myCommand.ExecuteNonQuery()
- myCommand.CommandText = "Insert into mytable (id, desc) VALUES (101, 'Description')"
- myCommand.ExecuteNonQuery()
- myTrans.Commit()
- Console.WriteLine("Success.")
- Catch e As Exception
- Try
- myTrans.Rollback()
- Catch ex As MySqlException
- If Not myTrans.Connection Is Nothing Then
- Console.WriteLine("An exception of type " & ex.GetType().ToString() & _
- " was encountered while attempting to roll back the transaction.")
- End If
- End Try
-
- Console.WriteLine("An exception of type " & e.GetType().ToString() & _
- "was encountered while inserting the data.")
- Console.WriteLine("Neither record was written to database.")
- Finally
- myConnection.Close()
- End Try
- End Sub
-
-
- public void RunSqlTransaction(string myConnString)
- {
- MySqlConnection myConnection = new MySqlConnection(myConnString);
- myConnection.Open();
-
- MySqlCommand myCommand = myConnection.CreateCommand();
- MySqlTransaction myTrans;
-
- // Start a local transaction
- myTrans = myConnection.BeginTransaction();
- // Must assign both transaction object and connection
- // to Command object for a pending local transaction
- myCommand.Connection = myConnection;
- myCommand.Transaction = myTrans;
-
- try
- {
- myCommand.CommandText = "Insert into mytable (id, desc) VALUES (100, 'Description')";
- myCommand.ExecuteNonQuery();
- myCommand.CommandText = "Insert into mytable (id, desc) VALUES (101, 'Description')";
- myCommand.ExecuteNonQuery();
- myTrans.Commit();
- Console.WriteLine("Both records are written to database.");
- }
- catch(Exception e)
- {
- try
- {
- myTrans.Rollback();
- }
- catch (MySqlException ex)
- {
- if (myTrans.Connection != null)
- {
- Console.WriteLine("An exception of type " + ex.GetType() +
- " was encountered while attempting to roll back the transaction.");
- }
- }
-
- Console.WriteLine("An exception of type " + e.GetType() +
- " was encountered while inserting the data.");
- Console.WriteLine("Neither record was written to database.");
- }
- finally
- {
- myConnection.Close();
- }
- }
-
-
- new { pooling = new
- {
- enabled = true,
- maxSize = 15,
- maxIdleTime = 60000,
- queueTimeout = 60000
- }
- }
-
-
- new { pooling = new
- {
- enabled = true,
- maxSize = 15,
- maxIdleTime = 60000,
- queueTimeout = 60000
- }
- }
-
-
- [JsonContainer(ItemConverterType = typeof(MyContainerConverter), ItemConverterParameters = new object[] { 123, "Four" })]
-
-
- [JsonContainer(NamingStrategyType = typeof(MyNamingStrategy), NamingStrategyParameters = new object[] { 123, "Four" })]
-
-
- [JsonProperty(ItemConverterType = typeof(MyContainerConverter), ItemConverterParameters = new object[] { 123, "Four" })]
-
-
- [JsonProperty(NamingStrategyType = typeof(MyNamingStrategy), NamingStrategyParameters = new object[] { 123, "Four" })]
-
- From Knuth Vol 2, pg 395.
-SimpleBigDecimal is basically a
- {@link java.math.BigInteger BigInteger} with a few digits on the right of
- the decimal point. The number of (binary) digits on the right of the decimal
- point is called the scale of the SimpleBigDecimal.
- Unlike in {@link java.math.BigDecimal BigDecimal}, the scale is not adjusted
- automatically, but must be set manually. All SimpleBigDecimals
- taking part in the same arithmetic operation must have equal scale. The
- result of a multiplication of two SimpleBigDecimals returns a
- SimpleBigDecimal with double scale.
- SimpleBigDecimal representing the same numerical
- value as value.
- @param value The value of the SimpleBigDecimal to be
- created.
- @param scale The scale of the SimpleBigDecimal to be
- created.
- @return The such created SimpleBigDecimal.
- SimpleBigDecimal. The value of the
- constructed SimpleBigDecimal Equals bigInt /
- 2scale.
- @param bigInt The bigInt value parameter.
- @param scale The scale of the constructed SimpleBigDecimal.
- αu's must be computed differently, see
- e.g. "Guide to Elliptic Curve Cryptography", Darrel Hankerson,
- Alfred Menezes, Scott Vanstone, Springer-Verlag New York Inc., 2004,
- p. 121-122
- αu's for a=0 as an array
- of ZTauElements.
- αu's for a=0 as an array
- of TNAFs.
- αu's for a=1 as an array
- of ZTauElements.
- αu's for a=1 as an array
- of TNAFs.
- λ of
- Z[τ].
- @param mu The parameter μ of the elliptic curve.
- @param lambda The element λ of
- Z[τ].
- @return The norm of λ.
- λ of
- R[τ], where λ = u + vτ
- and u and u are real numbers (elements of
- R).
- @param mu The parameter μ of the elliptic curve.
- @param u The real part of the element λ of
- R[τ].
- @param v The τ-adic part of the element
- λ of R[τ].
- @return The norm of λ.
- λ of R[τ]
- to an element of Z[τ], such that their difference
- has minimal norm. λ is given as
- λ = λ0 + λ1τ.
- @param lambda0 The component λ0.
- @param lambda1 The component λ1.
- @param mu The parameter μ of the elliptic curve. Must
- equal 1 or -1.
- @return The rounded element of Z[τ].
- @throws ArgumentException if lambda0 and
- lambda1 do not have same scale.
- n. For an integer
- k, the value λ = s k / n is
- computed to c bits of accuracy.
- @param k The parameter k.
- @param s The curve parameter s0 or
- s1.
- @param vm The Lucas Sequence element Vm.
- @param a The parameter a of the elliptic curve.
- @param m The bit length of the finite field
- Fm.
- @param c The number of bits of accuracy, i.e. the scale of the returned
- SimpleBigDecimal.
- @return The value λ = s k / n computed to
- c bits of accuracy.
- τ-adic NAF (non-adjacent form) of an
- element λ of Z[τ].
- @param mu The parameter μ of the elliptic curve.
- @param lambda The element λ of
- Z[τ].
- @return The τ-adic NAF of λ.
- τ() to an
- AbstractF2mPoint.
- @param p The AbstractF2mPoint to which τ() is applied.
- @return τ(p)
- μ of the elliptic curve.
- @param curve The elliptic curve from which to obtain μ.
- The curve must be a Koblitz curve, i.e. a Equals
- 0 or 1 and b Equals
- 1.
- @return μ of the elliptic curve.
- @throws ArgumentException if the given ECCurve is not a Koblitz
- curve.
- Uk-1 and
- Uk or Vk-1 and
- Vk.
- @param mu The parameter μ of the elliptic curve.
- @param k The index of the second element of the Lucas Sequence to be
- returned.
- @param doV If set to true, computes Vk-1 and
- Vk, otherwise Uk-1 and
- Uk.
- @return An array with 2 elements, containing Uk-1
- and Uk or Vk-1
- and Vk.
- tw. If the width is
- 4, then for mu = 1, tw = 6 and for
- mu = -1, tw = 10
- @param mu The parameter μ of the elliptic curve.
- @param w The window width of the WTNAF.
- @return the auxiliary value tw
- s0 and
- s1 used for partial modular reduction.
- @param curve The elliptic curve for which to compute
- s0 and s1.
- @throws ArgumentException if curve is not a
- Koblitz curve (Anomalous Binary Curve, ABC).
- (τm - 1)/(τ - 1).
- @param k The integer to be reduced.
- @param m The bitlength of the underlying finite field.
- @param a The parameter a of the elliptic curve.
- @param s The auxiliary values s0 and
- s1.
- @param mu The parameter μ of the elliptic curve.
- @param c The precision (number of bits of accuracy) of the partial
- modular reduction.
- @return ρ := k partmod (τm - 1)/(τ - 1)
- BigInteger using the reduced τ-adic
- NAF (RTNAF) method.
- @param p The AbstractF2mPoint to Multiply.
- @param k The BigInteger by which to Multiply p.
- @return k * p
- λ of Z[τ]
- using the τ-adic NAF (TNAF) method.
- @param p The AbstractF2mPoint to Multiply.
- @param lambda The element λ of
- Z[τ].
- @return λ * p
- λ of Z[τ]
- using the τ-adic NAF (TNAF) method, given the TNAF
- of λ.
- @param p The AbstractF2mPoint to Multiply.
- @param u The the TNAF of λ..
- @return λ * p
- [τ]-adic window NAF of an element
- λ of Z[τ].
- @param mu The parameter μ of the elliptic curve.
- @param lambda The element λ of
- Z[τ] of which to compute the
- [τ]-adic NAF.
- @param width The window width of the resulting WNAF.
- @param pow2w 2width.
- @param tw The auxiliary value tw.
- @param alpha The αu's for the window width.
- @return The [τ]-adic window NAF of
- λ.
- ECPoint for which to do the precomputation.
- @param a The parameter a of the elliptic curve.
- @return The precomputation array for p.
- Z[τ]. Let
- λ be an element of Z[τ]. Then
- λ is given as λ = u + vτ. The
- components u and v may be used directly, there
- are no accessor methods.
- Immutable class.
- λ.
- τ-adic" part of λ.
- λ of
- Z[τ].
- @param u The "real" part of λ.
- @param v The "τ-adic" part of
- λ.
- kP.
- PreCompInfo for a point on this curve, under a given name. Used by
- ECMultipliers to save the precomputation for this ECPoint for use
- by subsequent multiplication.
-
- @param point
- The ECPoint to store precomputations for.
- @param name
- A String used to index precomputations of different types.
- @param callback
- Called to calculate the PreCompInfo.
- ECCurve instance, and MUST already be normalized.
- ECMultiplier, unless already set.
- Fp (X9.62 s 4.2.1 pg 17).
- @return The decoded point.
- s0 and
- s1 used for partial modular reduction for
- Koblitz curves.
- z2 + z = beta(X9.62
- D.1.6) The other solution is z + 1.
-
- @param beta
- The value to solve the quadratic equation for.
- @return the solution for z2 + z = beta or
- null if no solution exists.
- s0 and
- s1 used for partial modular reduction for
- Koblitz curves.
- y2 + xy = x3 + ax2 + b.
- m of F2m.
- k where xm +
- xk + 1 represents the reduction polynomial
- f(z).k1 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).0k2 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).0k3 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).m of
- F2m.
- @param k The integer k where xm +
- xk + 1 represents the reduction
- polynomial f(z).
- @param a The coefficient a in the Weierstrass equation
- for non-supersingular elliptic curves over
- F2m.
- @param b The coefficient b in the Weierstrass equation
- for non-supersingular elliptic curves over
- F2m.
- m of
- F2m.
- @param k The integer k where xm +
- xk + 1 represents the reduction
- polynomial f(z).
- @param a The coefficient a in the Weierstrass equation
- for non-supersingular elliptic curves over
- F2m.
- @param b The coefficient b in the Weierstrass equation
- for non-supersingular elliptic curves over
- F2m.
- @param order The order of the main subgroup of the elliptic curve.
- @param cofactor The cofactor of the elliptic curve, i.e.
- #Ea(F2m) = h * n.
- m of
- F2m.
- @param k1 The integer k1 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).
- @param k2 The integer k2 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).
- @param k3 The integer k3 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).
- @param a The coefficient a in the Weierstrass equation
- for non-supersingular elliptic curves over
- F2m.
- @param b The coefficient b in the Weierstrass equation
- for non-supersingular elliptic curves over
- F2m.
- m of
- F2m.
- @param k1 The integer k1 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).
- @param k2 The integer k2 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).
- @param k3 The integer k3 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).
- @param a The coefficient a in the Weierstrass equation
- for non-supersingular elliptic curves over
- F2m.
- @param b The coefficient b in the Weierstrass equation
- for non-supersingular elliptic curves over
- F2m.
- @param order The order of the main subgroup of the elliptic curve.
- @param cofactor The cofactor of the elliptic curve, i.e.
- #Ea(F2m) = h * n.
- F2m in polynomial basis (PB)
- representation. Both trinomial (Tpb) and pentanomial (Ppb) polynomial
- basis representations are supported. Gaussian normal basis (GNB)
- representation is not supported.
- m of F2m.
- LongArray holding the bits.
- m of
- F2m.
- @param k1 The integer k1 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).
- @param k2 The integer k2 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).
- @param k3 The integer k3 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).
- @param x The BigInteger representing the value of the field element.
- m of
- F2m.
- @param k The integer k where xm +
- xk + 1 represents the reduction
- polynomial f(z).
- @param x The BigInteger representing the value of the field element.
- a and b
- are elements of the same field F2m
- (having the same representation).
- @param a field element.
- @param b field element to be compared.
- @throws ArgumentException if a and b
- are not elements of the same field
- F2m (having the same
- representation).
- F2m, either of
- {@link F2mFieldElement.Tpb} (trinomial
- basis representation) or
- {@link F2mFieldElement.Ppb} (pentanomial
- basis representation).
- m of the reduction polynomial
- f(z).
- k where xm +
- xk + 1 represents the reduction polynomial
- f(z).k1 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).0k2 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).0k3 where xm +
- xk3 + xk2 + xk1 + 1
- represents the reduction polynomial f(z).ECPoint by the given number.
- @param k The multiplicator.
- @return k * this.
- ECPoints.
- ECPoint p by k, i.e.
- p is added k times to itself.
- @param p The ECPoint to be multiplied.
- @param k The factor by which p is multiplied.
- @return p multiplied by k.
- ECPoints used for a fixed point multiplication.
- WNafMultiplier.
- this by an integer k using the
- Window NAF method.
- @param k The integer by which this is multiplied.
- @return A new ECPoint which equals this
- multiplied by k.
- ECPoints used for a Window
- NAF multiplication.
- ECPoints used
- for a Window NAF multiplication.
- ECPoint representing Twice(this). Used for the
- Window NAF multiplication to create or extend the precomputed values.
- w of the Window NAF. The width is
- defined as the minimal number w, such that for any
- w consecutive digits in the resulting representation, at
- most one is non-zero.
- @param k The integer of which the Window NAF is computed.
- @return The Window NAF of the given width, such that the following holds:
- k = ∑i=0l-1 ki2i
- , where the ki denote the elements of the
- returned byte[].
- τ-adic Non-Adjacent Form) algorithm.
- k using the reduced τ-adic NAF (RTNAF)
- method.
- @param p The AbstractF2mPoint to multiply.
- @param k The integer by which to multiply k.
- @return p multiplied by k.
- λ of Z[τ] using
- the τ-adic NAF (TNAF) method.
- @param p The AbstractF2mPoint to multiply.
- @param lambda The element λ of
- Z[τ] of which to compute the
- [τ]-adic NAF.
- @return p multiplied by λ.
- λ of Z[τ]
- using the window τ-adic NAF (TNAF) method, given the
- WTNAF of λ.
- @param p The AbstractF2mPoint to multiply.
- @param u The the WTNAF of λ..
- @return λ * p
- τ-adic Non-Adjacent Form) algorithm.
- AbstractF2mPoints used for the
- WTNAF multiplication in
- {@link org.bouncycastle.math.ec.multiplier.WTauNafMultiplier.multiply()
- WTauNafMultiplier.multiply()}.
- - The exception extends InvalidCastException to enable users to have a single handling case, - only introducing specific handling of this one if required. -
-string pw_hash = BCrypt.HashPassword(plain_password);
-
- if (BCrypt.Verify(candidate_password, stored_hash))
- Console.WriteLine("It matches");
- else
- Console.WriteLine("It does not match");
-
-
- string strong_salt = BCrypt.GenerateSalt(10);
- string stronger_salt = BCrypt.GenerateSalt(12);
-
- -
- G(x) = x^4 + (a+1/a)x^3 + ax^2 + (a+1/a)x + 1 -- where a = primitive root of field generator 0x14D - -