silverlight 线程委托实现时间控件

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Threading;


namespace SilverlightApplication28
{
    public partial class MainPage : UserControl
    {
        private Thread myThread = null;//定义线程
        private delegate void MyDelegate(object param);//定义委托
        private StackPanel TestStackPanel = null;
        private Button TestButton = null;
        private TextBlock TestTextBlock = null;
        public MainPage()
        {
            InitializeComponent();
            TestStackPanel = new StackPanel();
            TestStackPanel.VerticalAlignment = VerticalAlignment.Center;
            TestStackPanel.HorizontalAlignment = HorizontalAlignment.Center;
            LayoutRoot.Children.Add(TestStackPanel);


            TestButton = new Button();
            TestButton.Width = 200;
            TestButton.Height = 24;
            TestButton.Content = "Test";
            TestButton.Click += new RoutedEventHandler(TestButton_Click);
            TestStackPanel.Children.Add(TestButton);


            TestTextBlock = new TextBlock();
            TestStackPanel.Children.Add(TestTextBlock);
        }


        void TestButton_Click(object sender,RoutedEventArgs e)
        {
            string str = "welcome:";
            myThread = new Thread(ThreadMethod);
            myThread.Start(str);
        }
        private void ThreadMethod(object param)
        {
            MyDelegate myDelegate = new MyDelegate(DelegateMethod);
            while (true)
            {
                this.dispatcher.BeginInvoke(myDelegate,param);
                Thread.Sleep(1000);
            }
        }


        private void DelegateMethod(object param)
        {
            TestTextBlock.Text = param + DateTime.Now.ToString();
        }
    }
}