void LoadData() { try { var thang = itemThang.EditValue; var nam = itemNam.EditValue; if (thang == null || nam == null) { return; } DateTime tuNgay = new DateTime(int.Parse(nam.ToString()), int.Parse(thang.ToString()), 1); gcLichSuDiLam.DataSource = db.LichSuDiLam2_Select(ID, tuNgay); gcLichSuTraLuong.DataSource = db.LichSuTamUng2_Select(ID, tuNgay); itemCaption.Caption = string.Format("Lương thực nhận: {0:n0}", ((decimal)(gridColumn1.SummaryItem.SummaryValue == null ? 0 : gridColumn1.SummaryItem.SummaryValue) - (decimal)(gridColumn18.SummaryItem.SummaryValue == null ? 0 : gridColumn18.SummaryItem.SummaryValue))); } catch (Exception ex) { } }