protected override void ShowItemInGridViewRow(DataGridViewRow row, object item) { Holiday holiday = item as Holiday; row.Tag = holiday; row.Cells["colStartDate"].Value = holiday.StartDate.ToLongDateString(); row.Cells["colEndDate"].Value = holiday.EndDate.ToLongDateString(); row.Cells["colWeekendToWorkday"].Value = holiday.GetWeekendToWorkDayString(","); row.Cells["colMemo"].Value = holiday.Memo; }