WinForm应用程序的DataGridView里面的组合框

Question

在ComboBox中使用DataGridView：

实施：

当使用点击任意行时，

DataGridView与数据表绑定，而此行单元格元素转换为ComboBox，现在用户可以选择ComboBox元素。

问题：

它适用于所有情况，  dgvTables(e.ColumnIndex, e.RowIndex) = l_cmbTableList 但是当e.ColumnIndex和e.RowIndex具有相同的值时会出现问题，此时ComboBox列表项看起来很跳跃，用户无法选择此ComboBox项 第一次。

代码：

1

Private Sub dgvTables_CellClick(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles dgvTables.CellClick

If e.ColumnIndex > -1 Then
  If dgvTables.Columns(e.ColumnIndex).Name.Contains("TableCaption") Then
   dgvTables(e.ColumnIndex, e.RowIndex) = l_cmbTableList ' Problem is coming at that point,       dropdown list is jumpy, user not able to select item .
   l_cmbTableList.DisplayMember = CONST_TableCaption
   l_cmbTableList.ValueMember = CONST_TableCaption
   l_cmbTableList.DataSource = dt
   l_cmbTableList.DisplayStyle = DataGridViewComboBoxDisplayStyle.Nothing

End If

2

Private Sub dgvTables_EditingControlShowing(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) Handles dgvTables.EditingControlShowing
'Set the value of the object
  cmbEditingComobTables = CType(e.Control, ComboBox)
  If Not cmbEditingComobTables Is Nothing Then
  AddHandler cmbEditingComobTables.SelectedIndexChanged, AddressOf       editingCombo_SelectedIndexChanged
  cmbEditingComobTables.DrawMode = DrawMode.OwnerDrawFixed
  AddHandler cmbEditingComobTables.DrawItem, AddressOf cmb_DrawItem ' This attached event  will fire and set the color of combo box item
End If

3

Private Sub cmb_DrawItem(ByVal sender As System.Object, ByVal e As DrawItemEventArgs)
  If Not e.Index = -1 Then
  Dim cmb As ComboBox = DirectCast(sender, ComboBox)
  Dim dr As DataRowView = DirectCast(cmb.Items(e.Index), DataRowView)
  e.DrawBackground()
  e.Graphics.DrawString(dr(cmb.DisplayMember).ToString(), e.Font, New  SolidBrush(Color.Gray), e.Bounds.X, e.Bounds.Y)
End If