silverlight中的多线程和计时器

多线程

XAML代码：

<UserControl x:Class="Sample.ThreadSample"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    Width="350" Height="180">
<StackPanel x:Name="LayoutRoot">
    <Border x:Name="border" Background="AliceBlue" Margin="5"
        BorderBrush="Black" BorderThickness="3" CornerRadius="5">
    </Border>
    <StackPanel Orientation="Horizontal">
        <Button x:Name="btnStart" Width="100" Height="30"
                Content="开始线程"
                Click="btnStart_Click" Margin="10"></Button>
        <Button x:Name="btnJoin" Width="100" Height="30"
                Content="线程延迟"
                Click="btnJoin_Click"  Margin="10"></Button>
    </StackPanel>
</StackPanel>
</UserControl>

后台代码：

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.Threading;

namespace Sample
{
    public partial class ThreadSample : UserControl
    {
private static System.Windows.Controls.TextBlock tbk;
private Thread newThread;
public ThreadSample()
{
    InitializeComponent();
    //将文本控件添加到界面上
    tbk = new TextBlock()
    {
        FontSize = 24
        ,
        Width = 300
        ,
        Height = 100
    };
    border.Child = tbk;
    //创建一个新的线程并执行静态方法
    newThread = new Thread(ThreadSample.SetText);
    //线程开始
}

public static void SetText()
{
    int i = 60;
    while (i > 0)
    {
        tbk.Dispatcher.BeginInvoke(delegate()
        {
            tbk.Text = "离线程结束还有" + i + "秒";
        });
        i--;
        //线程等待
        Thread.Sleep(1000);
    }
}

private void btnStart_Click(object sender, RoutedEventArgs e)
{
    newThread.Start();
}

private void btnJoin_Click(object sender, RoutedEventArgs e)
{
    newThread.Join(2000);
}
    }
}

 

 

DispatcherTimer 是SL中很有用的一个计时器对象。也是基础SL 的UI线程

XAML代码：

<UserControl x:Class="Sample.Timer"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    Width="400" Height="200">
<Grid x:Name="LayoutRoot" Background="White">
    <!--背景-->
    <Rectangle Fill="Gold" Stroke="Black" 
               StrokeThickness="3" 
               RadiusX="5" RadiusY="5"/>
    <!--显示时间-->
    <TextBlock x:Name="tbkTimer" 
               Width="300" Height="50" 
               FontSize="30" Foreground="Red"/>
</Grid>
</UserControl>

 

后台代码：

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 Sample
{
    public partial class Timer : UserControl
    {
public Timer()
{
    InitializeComponent();
    //创建DispatcherTimer
    DispatcherTimer timer = new DispatcherTimer();
    //设置间隔1秒
    timer.Interval = new TimeSpan(0, 0, 1);   
    //创建事件处理
    timer.Tick += new EventHandler(timer_Tick);
    //开始计时
    timer.Start();
}

void timer_Tick(object sender, EventArgs e)
{
    //输出时间
    tbkTimer.Text = "当前时间:" + DateTime.Now.ToLongTimeString();
}
    }
}