GDBG Control: show nulls and reset values.

Hello. I have I already asked you about how to show (null)s for nullable empty fields in GridGroupingControl. I need the same functionality for GridDataBoundGrid, but I cannot done it same way. Please tell me how to implement showing nulls like in standard DataGrid control. Either I need the functionality to reset the value in datasource to DBNull for current cell. Thanks.

To display (null), you can use the PrepareViewStyleInfo event.

private void gridDataBoundGrid1_PrepareViewStyleInfo(object sender, GridPrepareViewStyleInfoEventArgs e)
{
	if(e.Style.CellValue == null || e.Style.CellValue == DBNull.Value)
	{
		e.Style.Text = "(null)";
	}
}

To set teh current cell to DBNull, you can use code like: GridCurrentCell cc = this.gridDataBoundGrid1.CurrentCell; cc.EndEdit(); this.gridDataBoundGrid1[cc.RowIndex, cc.ColIndex].CellValue = DBNull.Value;

And how to check that the data source allows nulls for current cell ?

You can try: int field = grid.Binder.ColIndexToField(grid.CurrentCell.ColIndex); if(myDataTable.Columns[field].AllowDBNull) { //accepts DBNull. }