Silverlight导入数据的三种写法

说明：

  System.ServiceModel.DomainServices.Client.LoadOperation - 用于异步加载  System.ServiceModel.DomainServices.Client.InvokeOperation - 用于异步调用  System.ServiceModel.DomainServices.Client.SubmitOperation - 用于异步提交

写法一

  private  void button3_Click( object sender, RoutedEventArgs e)         {               ds.Load(ds.GetSelectAllStudentQuery(), (x) =>             {                  this.dataGrid1.ItemsSource = x.Entities;             },  null); }           

写法二

 

private  void button3_Click( object sender, RoutedEventArgs e)         {             LoadOperation<SelectAllStudent_Result> loadOperation = ds.Load(ds.GetSelectAllStudentQuery(), OnLoadCallback,  false);         } private  void OnLoadCallback(LoadOperation<SelectAllStudent_Result> loadOp)         {              if (loadOp.HasError)             {                 MessageBox.Show(loadOp.Error.Message);                 loadOp.MarkErrorAsHandled();             }              else             {                  this.dataGrid1.ItemsSource = loadOp.Entities;             }         }

写法三

 

private  void button3_Click( object sender, RoutedEventArgs e)         { EntityQuery<SelectAllStudent_Result> query = ds.GetSelectAllStudentQuery().OrderByDescending(p => p.StudentID); LoadOperation<SelectAllStudent_Result> lo = ds.Load(query);             lo.Completed +=  delegate             {                  this.dataGrid1.ItemsSource = lo.Entities;             };         }

 

 

转载于:https://www.cnblogs.com/nnkook/archive/2011/12/13/2285796.html

相关资源：数据结构—成绩单生成器