DispatcherTimer 类 计时器

   <Grid x:Name="counterPanel" Background="AliceBlue">

    </Grid>

 

    public partial class Page : UserControl
    {
        public Page()
        {
            InitializeComponent();
            Loaded += new RoutedEventHandler(Page_Loaded);
        }

        void Page_Loaded(object sender, RoutedEventArgs e)
        {
            DispatcherTimer timer = new DispatcherTimer();
            int counter = 0;

            counterPanel.MouseLeftButtonDown +=
                delegate(object s, MouseButtonEventArgs args)
                {
                    if (timer.IsEnabled) timer.Stop(); else timer.Start();
                };

            timer.Tick +=
                delegate(object s, EventArgs args)
                {
                    counterPanel.Children.Clear();
                    counterPanel.Children.Add(new TextBlock
                    {
                        Text = counter++.ToString(),
                        Width=200,
                        Height=100,
                        FontSize=36
                    });
                };

            timer.Interval = new TimeSpan(0, 0, 1); // one second
            timer.Start();

        }
    }