DB 연결 관리 개선 및 연결 해제(Dispose) 오류 해결: Helper_DB의 연결 생성 및 해제 로직을 안전하게 리팩토링하고 Search_Infor에서 지역 변수를 사용하도록 수정

2026-01-25 13:56:18 +09:00
parent e3d5674b0a
commit 92f36e78a5
5 changed files with 112 additions and 83 deletions
--- a/unimarc/unimarc/Helper_DB.cs
+++ b/unimarc/unimarc/Helper_DB.cs
@@ -9,6 +9,7 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using System.Windows.Forms;
+using UniMarc.BaroService_TI;
 using UniMarc.Properties;

 namespace UniMarc
@@ -16,14 +17,31 @@ namespace UniMarc

    public partial class Helper_DB
    {
-        static string cs = "";
-
-        public static DataTable ExecuteQueryData(string query)
+        //static string cs = "";
+        public enum eDbType
        {
+            unimarc,
+            cl_marc
+        }
+        public static MySqlConnection CreateConnection(eDbType dbtype)
+        {
+            var dbname = dbtype.ToString();
+            string strConnection = string.Format(
+                          "Server={0};" +
+                          "Port={1};" +
+                          $"Database={dbname};" +
+                          "uid={2};" +
+                          "pwd={3};", ServerData[0], DBData[0], DBData[1], DBData[2]);
+            return new MySqlConnection(strConnection);
+        }
+
+        public static DataTable ExecuteQueryData(string query, MySqlConnection cn = null)
+        {
+            var bLocalCN = cn == null;
            DataTable dt = new DataTable();
            try
            {
-                var cn = new MySqlConnection(cs);
+                if (cn == null) cn = CreateConnection(eDbType.unimarc);// new MySqlConnection(cs);
                var cmd = new MySqlCommand(query, cn);
                cn.Open();
                using (MySqlDataAdapter adapter = new MySqlDataAdapter(cmd))
@@ -32,7 +50,7 @@ namespace UniMarc
                }
                cmd.Dispose();
                cn.Close();
-                cn.Dispose();
+                if (bLocalCN) cn.Dispose();
                return dt;
            }
            catch (Exception ex)
@@ -50,12 +68,12 @@ namespace UniMarc
        /// <param name="wheres"></param>
        /// <param name="orders"></param>
        /// <returns></returns>
-        public static DataTable GetDT(string tableName, string columns = "*", string wheres = "", string orders = "")
+        public static DataTable GetDT(string tableName, string columns = "*", string wheres = "", string orders = "", MySqlConnection cn = null)
        {
            var sql = $"select {columns} from {tableName}";
            if (wheres.isEmpty() == false) sql += " where " + wheres;
            if (orders.isEmpty() == false) sql += " order by " + orders;
-            return ExecuteQueryData(sql);
+            return ExecuteQueryData(sql, cn);
        }


@@ -65,16 +83,17 @@ namespace UniMarc
        /// </summary>
        /// <param name="query"></param>
        /// <returns></returns>
-        public static (int applyCount, string errorMessage) ExcuteNonQuery(string query)
+        public static (int applyCount, string errorMessage) ExcuteNonQuery(string query, MySqlConnection cn = null)
        {
            try
            {
-                var cn = new MySqlConnection(cs);
+                var bLocalCN = cn == null;
+                if (cn == null) cn = CreateConnection(eDbType.unimarc);//new MySqlConnection(cs);
                var cmd = new MySqlCommand(query, cn);
                cn.Open();
                var cnt = cmd.ExecuteNonQuery();
                cmd.Dispose();
-                cn.Dispose();
+                if (bLocalCN) cn.Dispose();
                return (cnt, string.Empty);
            }
            catch (Exception ex)
@@ -82,6 +101,38 @@ namespace UniMarc
                return (-1, ex.Message);
            }
        }
+
+        /// <summary>
+        /// Insert 명령을 수행한 후 자동 생성된 index값을 반환합니다.
+        /// 오류발생시에는 -1을 반환합니다
+        /// </summary>
+        /// <param name="cmd"></param>
+        /// <param name="cn"></param>
+        /// <returns></returns>
+        public long DB_Send_CMD_Insert_GetIdx(string cmd, MySqlConnection cn = null)
+        {
+            long lastId = -1;
+            var bLocalCN = cn == null;
+            try
+            {
+                
+                if (cn == null) cn = CreateConnection(eDbType.unimarc);//new MySqlConnection(cs);
+                using (var sqlcmd = new MySqlCommand(cmd, cn))
+                {
+                    cn.Open();
+                    sqlcmd.ExecuteNonQuery();
+                    lastId = sqlcmd.LastInsertedId;
+                }
+                if (bLocalCN) cn.Dispose();
+            }
+            catch (Exception ex)
+            {
+                UTIL.MsgE($"데이터베이스 실행오류\n{ex.Message}");
+            }
+            return lastId;
+        }
+
+
    }
    /// <summary>
    /// DB접속을 도와주는 클래스
@@ -94,14 +145,14 @@ namespace UniMarc
        /// <summary>
        /// IP / Port / Uid / pwd
        /// </summary>
-        string[] ServerData = {
+        static string[] ServerData = {
            Settings.Default.IP,
            Settings.Default.Uid,
            Settings.Default.pwd
        };
        int port = Settings.Default.Port;

-        string[] DBData = {
+        static string[] DBData = {
            Settings.Default.dbPort,
            Settings.Default.dbUid,
            Settings.Default.dbPwd
@@ -111,6 +162,28 @@ namespace UniMarc
        MySqlCommand sqlcmd = new MySqlCommand();
        MySqlDataReader sd;

+        public MySqlConnection CreateConnection()
+        {
+            PasswordConnectionInfo connectionInfo = new PasswordConnectionInfo(ServerData[0], port, ServerData[1], ServerData[2]);
+            connectionInfo.Timeout = TimeSpan.FromSeconds(30);
+            using (var client = new SshClient(connectionInfo))
+            {
+                client.Connect();
+                if (client.IsConnected)
+                {
+                    string strConnection = string.Format(
+                        "Server={0};" +
+                        "Port={1};" +
+                        "Database=unimarc;" +
+                        "uid={2};" +
+                        "pwd={3};", ServerData[0], DBData[0], DBData[1], DBData[2]);
+                    return new MySqlConnection(strConnection);
+                }
+            }
+
+            return null;
+        }
+

        /// <summary>
        /// DB를 사용하고 싶을 때 미리 저장된 DB의 기본 접속정보를 이용하여 DB에 접근한다.
@@ -130,7 +203,7 @@ namespace UniMarc
                client.Connect();
                if (client.IsConnected)
                {
-                    cs = string.Format(
+                    var cs = string.Format(
                        "Server={0};" +
                        "Port={1};" +
                        "Database=unimarc;" +
@@ -141,32 +214,6 @@ namespace UniMarc
            }
        }

-        public MySql.Data.MySqlClient.MySqlConnection CreateConnection()
-        {
-            PasswordConnectionInfo connectionInfo = new PasswordConnectionInfo(ServerData[0], port, ServerData[1], ServerData[2]);
-            connectionInfo.Timeout = TimeSpan.FromSeconds(30);
-            using (var client = new SshClient(connectionInfo))
-            {
-                if (conn != null)
-                {
-                    conn.Close();
-                    conn.Dispose();
-                }
-                client.Connect();
-                if (client.IsConnected)
-                {
-                    string strConnection = string.Format(
-                        "Server={0};" +
-                        "Port={1};" +
-                        "Database=unimarc;" +
-                        "uid={2};" +
-                        "pwd={3};", ServerData[0], DBData[0], DBData[1], DBData[2]);
-                    return new MySqlConnection(strConnection);
-                }
-            }
-
-            return null;
-        }

        /// <summary>
        /// 국중DB를 사용하고 싶을 때 미리 저장된 DB의 기본 접속정보를 이용하여 DB에 접근한다.
@@ -295,32 +342,8 @@ namespace UniMarc
            }
            conn.Close();
        }
-        public int DB_Send_CMD_reVoid(string cmd)
-        {
-            var ret = Helper_DB.ExcuteNonQuery(cmd);
-            if (ret.applyCount == -1) UTIL.MsgE($"데이터베이스 실행오류\n{ret.errorMessage}");
-            return ret.applyCount;
-        }

-        public long DB_Send_CMD_Insert_GetIdx(string cmd)
-        {
-            long lastId = -1;
-            try
-            {
-                using (var cn = this.CreateConnection())
-                {
-                    var sqlcmd = new MySqlCommand(cmd, cn);
-                    cn.Open();
-                    sqlcmd.ExecuteNonQuery();
-                    lastId = sqlcmd.LastInsertedId;
-                }
-            }
-            catch (Exception ex)
-            {
-                UTIL.MsgE($"데이터베이스 실행오류\n{ex.Message}");
-            }
-            return lastId;
-        }
+
        /// <summary>
        /// DBcon이 선진행되어야함.
        /// SELECT * FROM [DB_Table_Name] WHERE [DB_Where_Table] LIKE \"%DB_Search_Data%\"
--- a/unimarc/unimarc/마크/Mac_List.Designer.cs
+++ b/unimarc/unimarc/마크/Mac_List.Designer.cs
@@ -163,7 +163,7 @@
            this.dataGridView1.RowHeadersWidth = 40;
            this.dataGridView1.RowTemplate.Height = 23;
            this.dataGridView1.SelectionMode = System.Windows.Forms.DataGridViewSelectionMode.FullRowSelect;
-            this.dataGridView1.Size = new System.Drawing.Size(1310, 478);
+            this.dataGridView1.Size = new System.Drawing.Size(1638, 597);
            this.dataGridView1.TabIndex = 48;
            this.dataGridView1.CellDoubleClick += new System.Windows.Forms.DataGridViewCellEventHandler(this.dataGridView1_CellDoubleClick);
            this.dataGridView1.RowPostPaint += new System.Windows.Forms.DataGridViewRowPostPaintEventHandler(this.dataGridView1_RowPostPaint);
--- a/unimarc/unimarc/마크/Mac_List.resx
+++ b/unimarc/unimarc/마크/Mac_List.resx
@@ -169,7 +169,7 @@
  <data name="bindingNavigatorAddNewItem.Image" type="System.Drawing.Bitmap, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
    <value>
        iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABGdBTUEAALGPC/xhBQAAAAlwSFlzAAAO
-        wQAADsEBuJFr7QAAAVdJREFUOE/Nz0tLAmEUBmB3kWRoCUVEISFUJGb1OywiKrDsIpZdkJAkDUvDQkij
+        wAAADsABataJCQAAAVdJREFUOE/Nz0tLAmEUBmB3kWRoCUVEISFUJGb1OywiKrDsIpZdkJAkDUvDQkij
        UKSbVIvatKhNi9oERRAGEQXhjJdp7Hd83/eGs2jhLGQ20QtndTgP71Gp/m0KZ1XInlTjM6XG+4EG5fuK
        yaTUIN8bIMUQ0gmtcuBtX/MLPMT0yoHnuA6kuA4iruI20lAZ+DiswWuyFum4Dk+7dbiP6kHEFVDBg+tQ
        My4DLbjwG3DqbcORxygHXxJakGIQRFwDEf0gwjKI4AYtzIHmHaA5Oxg/CsYPIb7YIQced+qluvTLCyIs
@@ -184,7 +184,7 @@
  <data name="bindingNavigatorDeleteItem.Image" type="System.Drawing.Bitmap, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
    <value>
        iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABGdBTUEAALGPC/xhBQAAAAlwSFlzAAAO
-        wQAADsEBuJFr7QAAAWtJREFUOE+1kE0ow2Ecx/9X5a2UiwtKOSCTmJBMhuQlMo3IvCUHDouEXHZwIOVC
+        wAAADsABataJCQAAAWtJREFUOE+1kE0ow2Ecx/9X5a2UiwtKOSCTmJBMhuQlMo3IvCUHDouEXHZwIOVC
        DrhIDiQl5USy07zNa2tKf2laaRf84/J8xBCetab4XL/f76fn+SnKX4DrGLqrwbHDzywkWJlHdJYjLEbY
        Wg8q4eYKlma+d1hbgF4TotWIaC+FuYmAktcXCksx2HrknBOHX1KbiTDngrXhW0kMdSBM2TA5Io+/wuI0
        oiz5TcRwB7hPYazfLx3rDz7+gCsXNBb4v1SdgajTQ19TaOMP2NtFmPSIilSo0v1y7FHBnAdZMWi6aO51
@@ -196,7 +196,7 @@
  <data name="bindingNavigatorMoveFirstItem.Image" type="System.Drawing.Bitmap, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
    <value>
        iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABGdBTUEAALGPC/xhBQAAAAlwSFlzAAAO
-        wQAADsEBuJFr7QAAATFJREFUOE9jYBg0oHDW8/9NC57/z5z4+D+6HAyEtz/AKceQO/PZ/1VH3v/HpSi+
+        wAAADsABataJCQAAATFJREFUOE9jYBg0oHDW8/9NC57/z5z4+D+6HAyEtz/AKceQO/PZ/1VH3v/HpSi+
        +8H/4IZrWOXAIGPK0/8L933Aqii+5+H/pfv///evvoAhBwcJPU/+T9vyHkNRRPt9sObMWf//e5WewG1A
        ZNej/72rP6AoCm29B9bcuu7/f//Ov/9d8g/gNiCw+eH/uvnv4IqCW+7+X7T3//+Odf//Z8z5+d+u7ud/
        +4ztuA3wqLr/P3/aGxRFdsW3/6fP+f3fv+vbf53Cd/8tEtbjNsC+9O7/7MmvMRTpp5z/b1L04r9K1qf/
@@ -207,7 +207,7 @@
  <data name="bindingNavigatorMovePreviousItem.Image" type="System.Drawing.Bitmap, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
    <value>
        iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABGdBTUEAALGPC/xhBQAAAAlwSFlzAAAO
-        wQAADsEBuJFr7QAAALtJREFUOE9jYBgyILz9wX90MaJBfPeD/8EN18gzIL7n4f+l+///96++QLoBEe33
+        wAAADsABataJCQAAALtJREFUOE9jYBgyILz9wX90MaJBfPeD/8EN18gzIL7n4f+l+///96++QLoBEe33
        wZozZ/3/71V6gjQDQlvvgTW3rvv/37/z73+X/APEGxDccvf/or3//3es+/8/Y87P/3Z1P//bZ2wn3gAQ
        sCu+/T99zu///l3f/usUvvtvkbCeNANAQD/l/H+Tohf/VbI+/TeOXEa6ASBgkHTiv2za1/+6wfPIMwAE
        9FMv/9fwnUa+ASCg4jGBMgMGLwAA0BRgmCws/7cAAAAASUVORK5CYII=
@@ -216,7 +216,7 @@
  <data name="bindingNavigatorMoveNextItem.Image" type="System.Drawing.Bitmap, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
    <value>
        iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABGdBTUEAALGPC/xhBQAAAAlwSFlzAAAO
-        wQAADsEBuJFr7QAAAKRJREFUOE9jYBh0oHDW8//oYiSB3JnP/id03yPfkIwpT//P2//7f0LXHfIMSeh5
+        wAAADsABataJCQAAAKRJREFUOE9jYBh0oHDW8//oYiSB3JnP/id03yPfkIwpT//P2//7f0LXHfIMSeh5
        8n/2vl//O7f+/e9Wepl0QyK7Hv2fsu3X/5Klf/8nTP/73yb3LGmGBDY//N+69j1Ys3HJl//S0df+G0cu
        I94Qj6r7/0vmvoNrVnTpIV4zCNiX3v0f2PKMPM0gYJF3579NwRXyNIOAYdZt8jWDgE7aDfI1D00AAKB+
        X6Bjq5qXAAAAAElFTkSuQmCC
@@ -225,7 +225,7 @@
  <data name="bindingNavigatorMoveLastItem.Image" type="System.Drawing.Bitmap, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
    <value>
        iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABGdBTUEAALGPC/xhBQAAAAlwSFlzAAAO
-        wQAADsEBuJFr7QAAAStJREFUOE9jYBhUoHDW8//oYjAAkmta8Px/5sTHONUw5M589j+h+x5WBSC5VUfe
+        wAAADsABataJCQAAAStJREFUOE9jYBhUoHDW8//oYjAAkmta8Px/5sTHONUw5M589j+h+x5WBSC5VUfe
        /w9vf4BVHgwypjz9P2//7/8JXXcwFIHkFu778D+44RqGHBwk9Dz5P3vfr/+dW//+dyu9jKIQJDdty/v/
        /tUXcBsQ2fXo/5Rtv/6XLP37P2H63/82uWfhikFyvas//PcqPYHbgMDmh/9b174HazYu+fJfOvraf+PI
        ZWANILm6+e/+u+QfwG2AR9X9/yVz38E1K7r0wBWD5PKnvflvn7EdtwH2pXf/B7Y8w9AMk8ue/Pq/RcJ6
--- a/unimarc/unimarc/마크/Search_Infor.Designer.cs
+++ b/unimarc/unimarc/마크/Search_Infor.Designer.cs
@@ -28,7 +28,7 @@
        /// </summary>
        private void InitializeComponent()
        {
-            System.Windows.Forms.DataGridViewCellStyle dataGridViewCellStyle1 = new System.Windows.Forms.DataGridViewCellStyle();
+            System.Windows.Forms.DataGridViewCellStyle dataGridViewCellStyle2 = new System.Windows.Forms.DataGridViewCellStyle();
            this.label1 = new System.Windows.Forms.Label();
            this.dataGridView1 = new System.Windows.Forms.DataGridView();
            this.idx = new System.Windows.Forms.DataGridViewTextBoxColumn();
@@ -102,14 +102,14 @@
            // 
            this.dataGridView1.AllowUserToAddRows = false;
            this.dataGridView1.AllowUserToDeleteRows = false;
-            dataGridViewCellStyle1.Alignment = System.Windows.Forms.DataGridViewContentAlignment.MiddleCenter;
-            dataGridViewCellStyle1.BackColor = System.Drawing.SystemColors.Control;
-            dataGridViewCellStyle1.Font = new System.Drawing.Font("굴림", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(129)));
-            dataGridViewCellStyle1.ForeColor = System.Drawing.SystemColors.WindowText;
-            dataGridViewCellStyle1.SelectionBackColor = System.Drawing.SystemColors.Highlight;
-            dataGridViewCellStyle1.SelectionForeColor = System.Drawing.SystemColors.HighlightText;
-            dataGridViewCellStyle1.WrapMode = System.Windows.Forms.DataGridViewTriState.False;
-            this.dataGridView1.ColumnHeadersDefaultCellStyle = dataGridViewCellStyle1;
+            dataGridViewCellStyle2.Alignment = System.Windows.Forms.DataGridViewContentAlignment.MiddleCenter;
+            dataGridViewCellStyle2.BackColor = System.Drawing.SystemColors.Control;
+            dataGridViewCellStyle2.Font = new System.Drawing.Font("굴림", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(129)));
+            dataGridViewCellStyle2.ForeColor = System.Drawing.SystemColors.WindowText;
+            dataGridViewCellStyle2.SelectionBackColor = System.Drawing.SystemColors.Highlight;
+            dataGridViewCellStyle2.SelectionForeColor = System.Drawing.SystemColors.HighlightText;
+            dataGridViewCellStyle2.WrapMode = System.Windows.Forms.DataGridViewTriState.False;
+            this.dataGridView1.ColumnHeadersDefaultCellStyle = dataGridViewCellStyle2;
            this.dataGridView1.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
            this.dataGridView1.Columns.AddRange(new System.Windows.Forms.DataGridViewColumn[] {
            this.idx,
@@ -225,7 +225,7 @@
            // 
            // label2
            // 
-            this.label2.Location = new System.Drawing.Point(341, -3);
+            this.label2.Location = new System.Drawing.Point(363, 9);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(41, 12);
            this.label2.TabIndex = 5;
--- a/unimarc/unimarc/마크/Search_Infor.cs
+++ b/unimarc/unimarc/마크/Search_Infor.cs
@@ -14,7 +14,7 @@ namespace UniMarc
    public partial class Search_Infor : Form
    {
        Main main;
-        Helper_DB db = new Helper_DB();
+        //Helper_DB db = new Helper_DB();
        public string compidx;
        public Search_Infor(Main _main)
        {
@@ -24,7 +24,7 @@ namespace UniMarc
        }
        private void Search_Infor_Load(object sender, EventArgs e)
        {
-            db.DBcon();
+            //db.DBcon();

            string[] area = { "자체 DB", "국립 중앙 도서관" };
            cb_data_area.Items.AddRange(area);
@@ -41,6 +41,8 @@ namespace UniMarc
            string tQuery = MakeWHEREQurey();
            if (cb_data_area.SelectedIndex == 0)
            {
+
+                Helper_DB db = new Helper_DB();
                db.DBcon();

                //(string target, string searchText) = setting_target(true);
@@ -59,6 +61,7 @@ namespace UniMarc
            }
            else if (cb_data_area.SelectedIndex == 1)
            {
+                Helper_DB db = new Helper_DB();
                db.DBcon_cl();
                // -user date 비고2
                string Area = "`idx`, `grade`, `isbn`, `book_name`, `series`, `author`, "
@@ -403,6 +406,7 @@ namespace UniMarc

            if (cb_data_area.SelectedIndex == 0)
            {
+                Helper_DB db = new Helper_DB();
                db.DBcon();
                filter.Add("작성자");
                filter.Add("날짜");
@@ -429,6 +433,7 @@ namespace UniMarc
            }
            else
            {
+                Helper_DB db = new Helper_DB();
                db.DBcon_cl();
                cbUser.Items.Clear();
                cbUser.Items.Add("전체");
@@ -447,6 +452,7 @@ namespace UniMarc

        private void cb_filter_SelectedIndexChanged(object sender, EventArgs e)
        {
+            Helper_DB db = new Helper_DB();
            cb_filterDetail.Items.Clear();
            cb_filterDetail.Enabled = true;