private void btnUpdate_Click(object sender, RoutedEventArgs e)
 {
     if (!ValidationManager.Validate(this))
     {
         return;
     }
     //更新操作:
     serviceFacade.UpdateVirtualPurchaseOrderInfo(BuildEntity(), (obj, args) =>
     {
         if (args.FaultsHandle())
         {
             return;
         }
         AlertAndRefreshPage(ResVirtualStockPurchaseOrderMaintain.AlertMsg_OperationSuc);
     });
 }