Gridview 单元格双击事件没有被触发？

Question

我正在使用 C# 开发 winform 应用程序，但未触发 Gridview 单元格双击事件。我在下面给出了我的源代码

private void gridView2_DoubleClick(object sender, EventArgs e)
    {
        try
        {
            GridView view = (GridView)sender;
            DataTable getGrid = (DataTable)Popup_Grid.DataSource;
            int RowVal = gridView2.FocusedRowHandle;
            string FieldVal = ERPModule.isnull(Convert.ToString(gridView2.GetRowCellValue(RowVal, gridView2.Columns["DisplayName"])), "");

            if (RowVal != -1)
            {
                string SelectionStart = richTextBox1.Text.Substring(0, richTextBox1.SelectionStart);
                string SelectionEnd = richTextBox1.Text.Substring(richTextBox1.SelectionStart, richTextBox1.Text.Length - richTextBox1.SelectionStart);
                richTextBox1.Text = SelectionStart + FieldVal + SelectionEnd;
                Displaydata_Popup_Container.Parent.FindForm().Close();
            }
            else
            {
                Displaydata_Popup_Container.Parent.FindForm().Close();
            }
        }
        catch (Exception ex)
        {
            Utility.ErrorLog.WriteToFile(DataFile.errorFile, "PrintList : gridView2_DoubleClick()", ex.Message);
        }

    }

Answer 1

将常用逻辑提取到函数中（可扩展方法）

public static class DataTableExtensions
{
    public static int CountChequeStatusOf(this DataTable table, string condition)
    {
        var count = table.Compute("Count(ChequeStatus)", $"ChequeStatus = '{condition}'");
        return count == DbNull.Value ? 0 : (int)count;
    }
}

然后“重用”它

var table = (DataTable)grid_cheque.DataSource;

this.lblNew.Text = table.CountChequeStatusOf("New").ToString();
this.lbl_Issued.Text = table.CountChequeStatusOf("Issued").ToString();
this.lblCancel.Text = table.CountChequeStatusOf("Cancelled").ToString();
this.lbldishonour.Text = table.CountChequeStatusOf("DisHonour").ToString();