How can I hide the drop-down arrow of a DataGridViewComboBoxColumn like Visual Studio Properties window?

Question

I have a DataGridView where one of the columns is a DataGridViewComboBoxColumn . When the grid is populated, that column looks different because of the drop-down arrow appearing on each cell in the column. I'd like to change this so that the drop-down arrow is hidden and only shows up when the row is actually highlighted or when the combobox cell is selected for editing. The behavior I wanted is like how the Properties window in Visual Studio handles its values.

Answer 1

In the DataGridViewComboBoxColumn , there is a property called DisplayStyle . Set it to Nothing to hide the DropDownButton

Further information about the DataGridViewComboBoxDisplayStyle enumeration is available at this MSDN link

Answer 2

Took me a while to find this, but the above was the answer mixed with a couple of other pages.

This is how to hide the dropdown from a grid based on a value in a different one. The valueToCheck must be in a cell before the one containing the dropdown you wish to hide.

 Private Sub dgv_CellPainting(ByVal sender As Object, ByVal e As 
        DataGridViewCellPaintingEventArgs) Handles dgv.CellPainting

    'Pages Grid needs to be edited when rendering
    If (e.RowIndex >= 0 AndAlso e.ColumnIndex >= 0) Then
        Dim valueToCheck = dgv.Rows(e.RowIndex).Cells(2).Value

        If (valueToCheck <> "True") Then
            Dim thisCol = DirectCast(dgv.Rows(e.RowIndex).Cells(e.ColumnIndex), DataGridViewComboBoxCell)
            thisCol.DisplayStyle = DataGridViewComboBoxDisplayStyle.Nothing
            e.PaintBackground(e.ClipBounds, False)
            e.Handled = True
        End If
    End If

End Sub

Answer 3

如果设置DataGridViewComboBoxColumn.DisplayStyleForCurrentCellOnly = True ，则仅当单元格是当前单元格时才会显示下拉列表。