Combo Box inside the DataGridView of WinForm application

Question

Using ComboBox in DataGridView :

Implementation :

DataGridView is binding with the datatable, when use click over any row, than this row cell element convert into

combobox and now user able to select combo box elements .

Issue :

It is working fine for all the cases,

" dgvTables(e.ColumnIndex, e.RowIndex) = l_cmbTableList "

but issue is coming when e.ColumnIndex and e.RowIndex having same value, at that time combobox list item looks jumpy, user not able to select this combobox items

at first time . .

Code :

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