XAML does not support any timer feature and WPF does not have a Timer control or class. The DispatchTimer class defined in the System.Windows.Threading namespace is used to add timer functionality in WPF.

Creating a DispatchTimer

The following code snippet creates a DispatchTimer object.

DispatcherTimer dispatcherTimer = new DispatcherTimer();

Setting Tick and Interval

The Tick event handler executes when a DispatchTimer is started on a given Interval. The following code snippet sets the Tick and Interval of a DispatchTimer.

dispatcherTimer.Tick += new EventHandler(dispatcherTimer_Tick);
dispatcherTimer.Interval = new TimeSpan(0, 0, 1);

Start DispatchTimer

The Start method is used to start a DispatchTimer.

dispatcherTimer.Start();

Complete Code Example

Following code display the digital clock in the Label control. You can use Dispatcher Timer Tick event like a Timer Control in window form Application.

private void Window_Loaded(object sender, RoutedEventArgs e)
{
    DispatcherTimer dispatcherTimer = new DispatcherTimer();
    dispatcherTimer.Tick += new EventHandler(dispatcherTimer_Tick);
    dispatcherTimer.Interval = new TimeSpan(0, 0, 1);
    dispatcherTimer.Start();
} 
private void dispatcherTimer_Tick(object sender, EventArgs e)
{
    Label1.Text = DateTime.Now.ToString("HH:mm:ss");   
}