Slow DataGridView繪圖\渲染

我正在使用DataGridView從DataTable加載數據。此DataGridView位於選項卡（Forms.TabPage）上。當點擊這個標籤時，無論數據是否被加載，數據網格都需要一兩秒鐘的時間從上到下進行繪製。Slow DataGridView繪圖渲染

有什麼我可以做的，以加快單擊Tab時的繪圖\渲染？

我不認爲DGV的實際人口造成這種情況，因爲它是在表單加載期間填充的，所以在標籤點擊它時會加載顯示的幾行（20 - 30）。

Using cn As New SqlConnection(connectionString) 
      Using cmd As SqlCommand = cn.CreateCommand() 

       cmd.CommandType = System.Data.CommandType.Text 
       cmd.CommandText = _ 
        " SELECT [finish_time], [file_name], [transfer_status]" & _ 
        " FROM dbo.[transfer_log]" 

       cmd.Notification = Nothing 

       cn.Open() 


       Dim columnSpec = New DataColumn() 
       With columnSpec 
        .DataType = GetType(System.String) 
        .ColumnName = "ClmFinishTime" 
       End With 
       Datatable1.Columns.Add(columnSpec) 

       Dim columnSpec2 = New DataColumn() 
       With columnSpec2 
        .DataType = GetType(System.String) 
        .ColumnName = "ClmFilename" 
       End With 
       Datatable1.Columns.Add(columnSpec2) 

       Dim columnSpec3 = New DataColumn() 
       With columnSpec3 
        .DataType = GetType(System.Byte()) 
        .ColumnName = "ClmStatus" 
       End With 
       Datatable1.Columns.Add(columnSpec3) 

       Using dr As SqlDataReader = cmd.ExecuteReader() 
        While dr.Read() 

         Dim row As DataRow = Datatable1.NewRow 
         row("ClmFinishTime") = dr.Item("finish_time") 
         row("ClmFilename") = dr.Item("file_name") 

         Select Case dr.Item("transfer_status") 
          Case 0 
           row("ClmStatus") = ConvertToByte(My.Resources.accept) 
          Case 1 
           row("ClmStatus") = ConvertToByte(My.Resources.remove) 
         End Select 

         Datatable1.Rows.Add(row) 

        End While 
       End Using 
     End Using 
       DataGridView2.AutoGenerateColumns = False 
       DataGridView2.DataSource = Datatable1

來源

2010-10-04 madlan

如果我註釋掉「DataGridView2.DataSource = Datatable1」，它很好（即時），所以它必須是由於我構建數據源以添加圖標來代替返回的列ClmStatus。有什麼建議麼？ – madlan 2010-10-06 20:57:37

我固定這由雙緩衝控制：

Public Shared Sub SetDoubleBuffered(ByVal control As Control) 
    GetType(Control).InvokeMember("DoubleBuffered", BindingFlags.SetProperty Or BindingFlags.Instance Or BindingFlags.NonPublic, Nothing, control, New Object() {True}) 
End Sub

來源

2010-10-07 16:19:03 madlan