WPF应用程序中多个线程之间的通信

我向我的代码添加了一个事件处理程序，并且它打破了SystemHTA类中CollectionViewSources的所有访问，说“调用线程不能访问此对象，因为不同的线程拥有它”。当我的课程“this.systemHTA = new SystemHTA（）;”被放置在DeviceManager_StateChanged（）函数的外部。WPF应用程序中多个线程之间的通信

public partial class MainWindow : Window 
    { 
     private DeviceManager DeviceManager = DeviceManager.Instance; 
     public SystemHTA systemHTA; 

     public MainWindow() 
     { 
      InitializeComponent(); 
     } 

     private void Window_Loaded(object sender, RoutedEventArgs e) 
     { 
      DeviceManager.StateChanged += new EventHandler<DeviceManagerStateChangedEventArgs>(DeviceManager_StateChanged); 
      DeviceManager.Initialize(); 
     } 

     void DeviceManager_StateChanged(object sender, DeviceManagerStateChangedEventArgs e) 
     { 
      if (e.State == DeviceManagerState.Operational) 
      { 
       this.systemHTA = new SystemHTA(); 
      } 
     } 

     private void button1_Click(object sender, RoutedEventArgs e) 
     { 
      this.systemHTA.GetViewSourceTest(); 
     } 
    } 


    public class SystemHTA 
    { 
     private CollectionViewSource _deviceTestSource; 

     public SystemHTA() 
     { 
      _deviceTestSource = new CollectionViewSource(); 
      _deviceTestSource.Source = CreateLoadData<HWController>.ControllerCollection; 
     } 

     public void GetViewSourceTest() 
     { 
      ListCollectionView view = (ListCollectionView)_deviceTestSource.View; //This creates an error saying a thread already owns _deviceTestSource 
     } 
    }

来源

2010-05-30 Robert

好的，CollectionViewSource派生类，BindableList，ObservableCollection等这些类只能在主调度器线程中创建。

但是你一定要试试以下类似的东西，只在您的WPF派生类创建collectionviewsource，使用列表<>类加载在不同的线程的对象，一旦完成后，你可以从列表传输到collectionviewsource如下，我会推荐BindingList，因为您可以添加多个项目，禁用刷新以消除闪烁。

在WPF类隐式地创建您的收藏对象遵循

public class MyWindow : UserControl{ 
BindingList<MyObject> ObjectList = new BindingList<MyObject>; 
    public MyWindow(){ 
     ObjectList.AllowAdd = true; 
     ObjectList.AllowDelete = true; 
     ObjectList.AllowEdit = true; 
    } 
    public void LoadObjects(){ 
     ThreadPool.QueryUserItem((s)=>{ 
      // load your objects in list first in different thread 
      List<MyObject> list = MyLongMethodToLoadObjects(); 
      Dispatcher.BeginInvoke((Action)delegate(){ 
       list.RaiseEvents = false; 
       foreach(MyObject obj in list){ 
        ObjectList.Add(obj); 
       } 
       list.RaiseEvents = true; 
       list.ResetBindings(); 
      }); 
     }); 
    } 
}

我不知道这个代码不正确的格式，但您可以尝试看到它在Visual Studio中得到正确的想法。

来源

2010-05-30 07:19:24

我结束了刚刚用ObservableCollection替换CollectionViewSource，一切正常。感谢您指点我正确的方向。 – Robert 2010-05-31 02:19:21