protected override ResultMessage CheckValid() { var result = txtSupplierName.Text == string.Empty; var message = string.Format("{0}未填写,不能保存", txtSupplierName.LabelText); if (result) { txtSupplierName.Focus(); Utility.ShowError(message, this); return(new ResultMessage(result, message)); } var bl = new SupplierBL(); return(bl.CheckValid(this.Current)); }