DBNull in Cell that ecpects int

GDBG has combobox with ValueMember of type int. I can select values from combobox without any problems. When I try to press DELETE, text part of combobox becomes empty and I want to save there DBNull.value, but Messagebox appears that this cast is not possible: System.ArgumentException: Input string was not in a correct format.Couldn''t store <> in TableID Column. Expected type is Int16. ---> System.FormatException: Input string was not in a correct format. at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) at System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info) ...... Is it possible to handle such situation?

just found in forum void dtg_CurrentCellValidating(object sender, CancelEventArgs e) { GridCurrentCell cc = this.dtg.CurrentCell; if (cc.ColIndex == (int)ColumnNames.Table) { if (cc.Renderer.ControlText == "") cc.Renderer.ControlValue = DBNull.Value; } } Is it right approach?

Hi Sahon, The approach is right. But you can get the column index using the this.gridDataBoundGrid1.Binder.NameToColIndex("ColumnName"); Below is a code snippet. Regards, Calvin. private void gridDataBoundGrid1_CurrentCellValidating(object sender, System.ComponentModel.CancelEventArgs e) { GridCurrentCell cc = this.gridDataBoundGrid1.CurrentCell; if(cc.ColIndex == this.gridDataBoundGrid1.Binder.NameToColIndex("ColumnName")) if (cc.Renderer.ControlText == "") cc.Renderer.ControlValue = DBNull.Value; }