Datagridview Virtual Mode property

Question

I have a datagridviewcombobox column which works well only when the VirtualMode property is false. Otherwise the value selected from the list will not be displayed in the column. This is added like this DataGridViewComboBoxColumn colCategory = new DataGridViewComboBoxColumn (); colCategory.Name = Consts .DATAGRID_CATEGORY; colCategory.DataPropertyName = Consts .DATAGRID_CATEGORY; colCategory.HeaderText = Consts .DATAGRID_CATEGORY.ToString(); colCategory.SortMode = DataGridViewColumnSortMode .Automatic; colCategory.Items.AddRange( new string [] { Subsystem  Library  Unknown  Hole }); this .dgBudgetInfo.Columns.Insert(1 colCategory); Also I am generating the serial no automatically like this: private void dgBuildFile_NewRowNeeded( object sender DataGridViewRowEventArgs e) { this .dgBuildFile.Rows[ this .dgBuildFile.Rows.Count - 1].Cells[0].Value = this .GetNewSlNo(); } This works only when the VirtualMode property is set to true. BTW I cannot take an AutoIncrement column for various other reasons. Is there any workaround to achieve both of them in the same datagrid?

Vugar · Answer

You can use autoincrement without virtualmode ----------------- Private Sub DataGridView1_RowPostPaint(ByVal sender As Object ByVal e As System.Windows.Forms.DataGridViewRowPostPaintEventArgs) Handles DataGridView1.RowPostPaint Using b As New SolidBrush((DirectCast(sender DataGridView)).RowHeadersDefaultCellStyle.ForeColor) e.Graphics.DrawString((e.RowIndex + 1).ToString(System.Globalization.CultureInfo.CurrentUICulture) e.InheritedRowStyle.Font b e.RowBounds.Location.X + 20 e.RowBounds.Location.Y + 4) End Using End Sub

Bechir Bejaoui · Answer

is your code embedded with a loop or used in a recursive context?

Srinivas kadiyala · Answer

Thanks for the suggestion. But it works only for the first row. After I enter one row and go to the new row it doesn't work. Any reasons for this behavior??

Bechir Bejaoui · Answer

If you want both contexts at once you can play on the Virtual mode it self I mean Before executing the code that needs Virtual mode set to true then you set datagridview.Virtualmode = true; and just after the code you reset datagridview.VirtualMode = false; you can swap the mode between codes datagridview.VirtualMode = true; //Your code datagridview.VirtualMode = flase; like that