private void cancelAudit_Click(object sender, RoutedEventArgs e)
        {
            selected.Clear();

            string tip = string.Empty;

            foreach (GiftVoucherProductRelationReqVM item in this.productreqgd.ItemsSource)
            {
                if (item.IsChecked)
                {
                    selected.Add(item.SysNo);
                }
            }

            if (!string.IsNullOrEmpty(tip))
            {
                Window.Alert("提示", tip, MessageType.Information, (obj, args) =>
                {
                    Window.Refresh();
                });
                return;
            }

            if (selected.Count == 0)
            {
                Window.Alert("请选择至少选择一个商品!");
                return;
            }

            if (selected != null && selected.Count > 0)
            {
                _facade.BatchCancelAuditVoucherRequest(selected, (msg) =>
                {
                    Window.Alert("提示", msg, MessageType.Information, (obj, args) =>
                    {
                        Window.Refresh();
                    });
                });
            }
        }