转载地址http://www.cnblogs.com/lanbaoming/archive/2011/07/21/2112353.html

 1 publicpartialclass Timer : UserControl
 2     {
 3 public Timer()
 4         {
 5 // 为初始化变量所必需
 6             InitializeComponent();
 7             DispatcherTimer timer =new DispatcherTimer();
 8             timer.Interval =new TimeSpan(0, 0, 1);
 9             timer.Tick +=new EventHandler(timer_Tick);
10             timer.Start();
11         }
12 
13 void timer_Tick(object sender, EventArgs e)
14         {
15             tbkTimer.Text ="当前时间:"+ DateTime.Now.ToLongTimeString();
16         }
17     }