wpf後臺線程更新UI控制

Question

我有一個工作應用程序，向網格添加新的RibbonTab和新的子控件。

我想提出這個動作在後臺線程的子控件可能需要一段時間從數據庫中收集數據等

我有下面的代碼至今：

Ribbon Ribbon_Main = new Ribbon(); 
Grid Grid_Main = new Grid(); 

Thread newthread2 = new Thread(new ThreadStart(delegate { Graphing_Template.add_report(); })); 
newthread2.SetApartmentState(ApartmentState.STA); //Is this required? 
newthread2.Start(); 


Class Graphing_Template() 
{ 
    static void add_report() 
    { 
    RibbonTab rt1 = new RibbonTab(); 
    MainWindow.Ribbon_Main.Items.Add(rt1); 
    // Create control with information from Database, etc. 
    // add control to MainWindow.Grid_Main 
    } 
} 

我想要在後臺創建新的報表控件，並在準備就緒時將其添加到主UI。

我去解決的辦法是：

 BackgroundWorker worker = new BackgroundWorker(); 
    worker.DoWork += delegate(object s, DoWorkEventArgs args) 
      { 
       DataTable dt1 = new DataTable(); 
       ---- Fill DataTable with 
       args.Result = datagrid_adventureworks_DT(); 
      }; 

worker.RunWorkerCompleted += delegate(object s, RunWorkerCompletedEventArgs args) 
      { 
       DataTable dt1 = (DataTable)args.Result; 
       Datagrid_Main.ItemsSource = dt1.AsDataView(); 
      }; 

Answer 1

private void Window_Loaded(object sender, RoutedEventArgs e) 
    { 
     Test4(); 

    } 
    private void Test1() 
    { 
     while (true) 
     { 
      this.Title = DateTime.Now.ToString(); 
      System.Threading.Thread.Sleep(5000); //locks up app 
     } 
    } 
    private void Test2() 
    { 
     var thd = new System.Threading.Thread(() => { 
      while (true) 
      { 
       this.Title = DateTime.Now.ToString(); //exception 
       System.Threading.Thread.Sleep(5000); 
      }    
     }); 
     thd.Start(); 
    } 

    private void Test3() 
    { //do the work on the background thread 
     var thd = new System.Threading.Thread(() => 
     { 
      while (true) 
      { //use dispatcher to manipulate the UI 
       this.Dispatcher.BeginInvoke((Action)(() 
        => { this.Title = DateTime.Now.ToString(); 
       })); 

       System.Threading.Thread.Sleep(5000); 

       //there's nothing to ever stop this thread! 
      } 
     }); 
     thd.Start(); 
    } 

    private async void Test4() 
    { //if you are using .Net 4.5 you can use the Async keyword 
     //I _think_ any computation in your async method runs on the UI thread, 
     //so don't use this for ray tracing, 
     //but for DB or network access your workstation can get on with 
     //other (UI) work whilst it's waiting 
     while (true) 
     { 
      await Task.Run(() => { System.Threading.Thread.Sleep(5000); }); 
      this.Title = DateTime.Now.ToString(); 
     } 
    }