<UserControl x:Class="DispatcherTimerDome.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:DesignHeight="300" d:DesignWidth="400">
<Grid x:Name="LayoutRoot" Background="White">
<StackPanel >
<Border Background="DarkCyan" Width="400" Height="300" BorderBrush="Red" BorderThickness="5" CornerRadius="10" >
<TextBlock Name="tbName" FontSize=" 24" Width="200" Height="200" >
</TextBlock>
</Border>
</StackPanel>
</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 DispatcherTimerDome
{
public partial class MainPage : UserControl
{
public MainPage()
{
InitializeComponent();
DispatcherTimer timer = new DispatcherTimer();
timer.Interval = new TimeSpan(0, 0, 1);
timer.Tick += new EventHandler(timer_Tick);
timer.Start();
}
void timer_Tick(object sender, EventArgs e)
{
tbName.Text = DateTime.Now.ToLongTimeString();
}
}
}