BoldSignEasily embed eSignatures in your .NET applications. Free sandbox with native SDK available.
private void Model_SaveCellInfo(object sender, GridSaveCellInfoEventArgs e) { if(e.Style.CellType == "CheckBox" && e.Style.CellValue != null && e.Style.Text.Length == 0) { e.Style.CellValue = DBNull.Value; } }