DispatcherTimer

DispatcherTimerを使って簡単な時計
こんな感じ

ASのTimerクラスと同じ感じですね。

ソース

<UserControl x:Class="SilverlightApplication8.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
    mc:Ignorable="d" d:DesignWidth="640" d:DesignHeight="480" Loaded="UserControl_Loaded">
  <Grid x:Name="LayoutRoot">
       <TextBlock x:Name="Time" TextWrapping="Wrap" FontSize="50"/>
    </Grid>
</UserControl>

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.Windows.Threading;

namespace SilverlightApplication8
{
    public partial class MainPage : UserControl
    {
        public MainPage()
        {
            InitializeComponent();
        }

        private void UserControl_Loaded(object sender, RoutedEventArgs e)
        {
            DispatcherTimer dTimer = new DispatcherTimer();
            //実行間隔を0時間0分1秒に設定
            dTimer.Interval = new TimeSpan(0, 0, 1);
            //エベントの登録
            dTimer.Tick += new EventHandler(dTimer_Tick);
            //タイマースタート
            dTimer.Start();
        }

        private void dTimer_Tick(object sender, EventArgs e)
        {
            Time.Text = "";
            //現在の時間を取得
            Time.Text += DateTime.Now.Hour;
            Time.Text += ":";
            Time.Text += DateTime.Now.Minute;
            Time.Text += ":";
            Time.Text += DateTime.Now.Second;
        }
    }
}