C#:DataGridView控制項操作

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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Windows.Forms;   namespace Common {     /// <summary>     /// DataGridView控制項操作     /// </summary>     public class CtlDataGridViewOperate     {         private DataGridView m_dataGridView = null;           /// <summary>         /// DataGridView控制項         /// </summary>         public DataGridView refDataGridViewControl         {             set             {                 m_dataGridView = value;             }             get             {                 return m_dataGridView;             }         }           /// <summary>         /// 建構函式         /// </summary>         public  CtlDataGridViewOperate()         {         }           private static volatile CtlDataGridViewOperate m_dgvOpera = null;           /// <summary>         /// 擷取DataGridView控制項操作類單一執行個體         /// </summary>         /// <returns></returns>         public static CtlDataGridViewOperate GetInstance()         {             if(null == m_dgvOpera)             {                 m_dgvOpera = new CtlDataGridViewOperate();             }             return m_dgvOpera;         }           /// <summary>         /// 點擊資料格視圖儲存格顯示對話方塊         /// </summary>         /// <param name="frm">要顯示的對話方塊</param>         /// <param name="headerText">列頭名稱</param>         /// <param name="e">資料格視圖儲存格事件參數</param>         public void ClickCellShowDlg(Form frm, string headerText, DataGridViewCellEventArgs e)         {             if (e.RowIndex < 0 || e.ColumnIndex < 0)             {                 return;             }             var clmindx = m_dataGridView.CurrentCell.ColumnIndex;             if (m_dataGridView.Columns[clmindx].HeaderText.Trim() == headerText)             {                 var rowCell = m_dataGridView.CurrentCell.Value;                 if (rowCell != null)                 {                     frm.StartPosition = FormStartPosition.CenterScreen;                     frm.ShowDialog();                 }               }         }       } }