Silverlight 2 DispatcherTimer

Silverlight vs Flex

.NET开发Silverlight程序入门（一）：项目结构

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[2008/03/29 17:53 | 分类: Silverlight技术 | by gdgzboy ]

一段Silverlight时钟代码...

Page.xaml如下：

Page.xaml.cs如下：

using System;

using System.Collections.Generic;

using System.Linq;

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.Markup;

namespace OpenXmlVideo2

{

public partial class Page : UserControl

{

private TextBlock textBlock1;

private System.Windows.Threading.DispatcherTimer timer;

public Page()

{

InitializeComponent();

this.Loaded += new RoutedEventHandler(Page_Loaded);

}

void Page_Loaded(object sender, RoutedEventArgs e)

{

string xaml = string.Empty;

xaml = "<TextBlock xmlns=\"http://schemas.microsoft.com/client/2007\" Margin=\"14,11,19,12\" Name=\"textBlock1\" FontFamily=\"Time New Roman\" FontSize=\"40\">00:00:00</TextBlock>";

textBlock1 = XamlReader.Load(xaml) as TextBlock;

//Loaded就是TextBlock的加载事件，那么里面的textBlock1_Loaded自然就是事件处理程序的名称。

textBlock1.Loaded += new RoutedEventHandler(textBlock1_Loaded);

//改变附加属性（attached properties）,必须使用SetValue方法

textBlock1.SetValue(Canvas.LeftProperty, 2);

textBlock1.SetValue(Canvas.TopProperty, 2);

//加把textBlock1对象做为子对象添加到画布（和asp.net页的控件树的道理相拟）

this.EClock.Children.Add(textBlock1);

}

void textBlock1_Loaded(object sender, RoutedEventArgs e)

{

//使用了DispatcherTimer，我把间隔设置为1秒。该计时器的间隔事件也是Tick事件

timer = new System.Windows.Threading.DispatcherTimer();

timer.Interval = new TimeSpan(0, 0, 1); //间隔1秒

timer.Tick += new EventHandler(timer_Tick);

timer.Start();

}

void timer_Tick(object sender, EventArgs e)

{

textBlock1.Text = DateTime.Now.ToLongTimeString();

}

Tags: silverlight , dispatchertimer , 代码 , ria

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Silverlight 2 DispatcherTimer

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