BackgroundWorker和CollectionViewSource

Question

如何在使用CollectionViewSource時在backgroundworker中加載數據？它會拋出一個錯誤，因爲我的CollectionViewSource在UI線程中。

這是我所有的代碼（我的背景工人在XAML中設置）：

public partial class DepartmentsLookup : Window 
{ 
    private BackgroundWorker backgroundWorker; 
    private ObservableCollection<Department> AllDepartmentsData; 
    private ListCollectionView AllDepartmentsView; 

    private void backgroundWorker_DoWork(object sender, DoWorkEventArgs e) 
    { 
     IEnumerable<Department> data = null; 
     using (ArchiveEntities db = new ArchiveEntities()) 
     { 
      data = db.Departments; 
      this.AllDepartmentsData = new ObservableCollection<Department>(data); 
     } 
     CollectionViewSource departmentsSource = (CollectionViewSource)this.FindResource("AllDepartmentsDataSource"); 
     departmentsSource.Source = this.AllDepartmentsData; 
     this.AllDepartmentsView = (ListCollectionView)departmentsSource.View; 
    } 

    public DepartmentsLookup() 
    { 
     InitializeComponent(); 
     backgroundWorker = ((BackgroundWorker)this.FindResource("backgroundWorker")); 
    } 

    private void Window_Loaded(object sender, RoutedEventArgs e) 
    { 
     backgroundWorker.RunWorkerAsync(); 
    } 
} 

感謝名單。

Answer 1

您必須使用WPF的Dispatcher對象（Dispatcher.Invoke）才能在UI元素上執行代碼（當從backgroundWorker完成時）。也許this article可以給你一些更多的信息。

或working with the WPF Dispatcher。