Silverlight 计时器

public partial class MainPage : UserControl
{
int i = 1;
TextBlock myTextBlock;
public MainPage()
{
      InitializeComponent();
      myTextBlock = new TextBlock();
      myTextBlock.Loaded += this.StartTimer;
      myTextBlock.Margin = new Thickness(30);
      LayoutRoot.Children.Add(myTextBlock);
}
public void StartTimer(object o, RoutedEventArgs sender)
{
      //创建计时器
      System.Windows.Threading.DispatcherTimer myDispatcherTimer = new System.Windows.Threading.DispatcherTimer();
      //创建间隔时间
      myDispatcherTimer.Interval = new TimeSpan(0,0,0,1); 
      //创建到达间隔时间后需执行的函数
      myDispatcherTimer.Tick += new EventHandler(Each_Tick);
      //开启计时器
      myDispatcherTimer.Start();
}

public void Each_Tick(object o, EventArgs sender)
{
      myTextBlock.Text = i++.ToString() + " 秒";
}
}