如何处理System.InvalidOperationException？

Question

未处理的类型＆＃39; System.InvalidOperationException＆＃39;当我想通过backgroundworker在列表框中显示数据库数据时发生了

以下是代码：

public partial class Window1 : Window
{
        public Window1()
        {
            InitializeComponent();
        }
        private List<Product> products;

        private void LstProduct_loaded(object sender, RoutedEventArgs e)
        {
            BackgroundWorker Worker = new BackgroundWorker();
            Worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(worker_RunWorkerCompleted);
            Worker.DoWork += new DoWorkEventHandler(worker_DoWork);
            Worker.RunWorkerAsync();
        }

        private void worker_DoWork(object sender, DoWorkEventArgs e)
        {
            products = App.StoreDb.GetProducts();

        }

        private void worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {
            LoadingGrid.Visibility = Visibility.Collapsed;
            Lstproducts.ItemsSource = products;
        }



}

Answer 1

尝试使用

private void LstProduct_loaded(object sender, RoutedEventArgs e)
{
  //create thread 
  ThreadStart myThreadStart = new ThreadStart(MyThreadRoutine);
  Thread myThread = new Thread(myThreadStart);
  myThread.ApartmentState = ApartmentState.STA;
  myThread.Start();
}

//function
private void MyThreadRoutine()
    {
        this.Invoke((MethodInvoker)delegate {    
          products = App.StoreDb.GetProducts();
          this.LoadingGrid.Visibility = Visibility.Collapsed;
          this.Lstproducts.ItemsSource = products;
         });
    }