Question

WPF线程模型问题

自己写了一个简单的程序帮助了解WPF的线程模型。
public MainWindow()
{
InitializeComponent();
}

private void Start_btn_Click(object sender, RoutedEventArgs e)
{

AddItemEventHanlder ah=new AddItemEventHanlder(AddItem);
this.Dispatcher.BeginInvoke(DispatcherPriority.ApplicationIdle, ah);

}

private void Look_btn_Click(object sender, RoutedEventArgs e)
{
MessageBox.Show(this.TestListBox.Items.Count.ToString());
}
private void AddItem()
{
for (int i = 0; i < 100000; i++)
{
this.TestListBox.Items.Add(String.Format("Item {0}", i));
Thread.Sleep(1);
}
}
private delegate void AddItemEventHanlder();
这样写还是会阻塞主进程，求详细解答。

Answer 1

        private void Start_btn_Click(object sender, RoutedEventArgs e)
        {
            Thread t = new Thread(AddItem);
            t.Start();
        }

        private void AddItem()
        {
            for (int i = 0; i < 100000; i++)
            {
                this.Dispatcher.Invoke(new Action(() =>
                     this.TestListBox.Items.Add(
                     String.Format("Item {0}", i)
                     )));
            }
        }