在Silverlight中读取指定URL图片包数据

< Grid  x:Name ="LayoutRoot"  BACkground ="White" >
     < Grid.RowDeFinitions >
         < RowDeFinition  Height ="250"   />
         < RowDeFinition  Height ="100"   />
         < RowDeFinition  Height ="50"   />
     </ Grid.RowDeFinitions >
     < StackPanel  Grid.Row ="1" >
         < ListBox  x:Name ="ImageList" />
         < Button  x:Name ="Download"  Click ="StartDownLoad"  Content ="下载该图片" />
     </ StackPanel >

     < StackPanel  Grid.Row ="0" >             
         < ScrollViewer  HorizontalScrollBarVisibility ="Auto"   >
             < Image  x:Name ="ImgToFill"   >            
             </ Image >
         </ ScrollViewer >
     </ StackPanel >

     < StackPanel  Grid.Row ="2" >
         < Canvas  Canvas.Top ="70"   >
             < Rectangle   Name ="progressRectangle"  Height ="10"  Width ="0"  Fill ="AliceBlue"   />
             < Rectangle  Height ="12"   Width ="202"  strokeThickness ="1"  stroke ="Black"   />
             < TextBlock  x:Name ="progressText"  Canvas.Left ="210"  text ="0%"  FontSize ="12"   />
         </ Canvas >
     </ StackPanel >
</ Grid >

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.IO;
using  System.Windows.resources;
using  System.Windows.Media.Imaging;

namespace  DownLoadImg
{
     public   partial   class  Page : UserControl
    {
        WebClient wc  =   new  WebClient();

         public  Page()
        {
            initializeComponent();
             this .Loaded  +=   new  routedEventHandler(Page_Loaded);
        }

         // 加载图片列表数据
         void  Page_Loaded( object  sender, routedEventArgs E)
        {
            ImageList.Items.Add( " 1.jpg " );
            ImageList.Items.Add( " 2.png " );
        }
         // 实例化下载设置
         void  StartDownLoad( object  o, EventArgs E)
        {
             // 初始化相应控件信息
            ImgToFill.Visibility  =  Visibility.Collapsed;
            progressRectangle.Width  =   0 ;
            progressText.Text  =   " 0% " ;
             // 绑定下载过程中处理的事件
            wc.openReadCoR_54_11845@pleted  +=   new  OpenReadCoR_54_11845@pletedEventHandler(wc_OpenReadCoR_54_11845@pleted);
            wc.DownloadProgressChanged  +=   new  DownloadProgressChangedEventHandler(wc_DownloadProgressChanged);
             // 开始异步读取压缩包中的文件信息
            wc.openReadAsync( new  Uri( " img.zip " , UriKind.RelativE), ImageList.SELEctedItem);
        }
        
         void  wc_OpenReadCoR_54_11845@pleted( object  sender, OpenReadCoR_54_11845@pletedEventArgs E)
        {
            // 实例化流资源信息，准备获取其中的图片数据
            StreamresourceInfo sri  =   new  StreamresourceInfo(e.Result  as  Stream,  null );
             // 要读取的图片路径信息
            String sURI  =  e.UserState  as  String;
             // 从流资源中获取指定的URL图片流信息
            StreamresourceInfo imageStream  =  Application.GetresourceStream(sri,  new  Uri(sURI, UriKind.RelativE));
            BitmapImage imgsrc  =   new  BitmapImage();
             // 绑定该URL图片信息并进行显示
            imgsrc.Setsource(imageStream.Stream);
            ImgToFill.source  =  imgsrc;
            ImgToFill.Visibility  =  Visibility.Visible;
            ImgToFill.Stretch  =  Stretch.Fill;
        }

         void  wc_DownloadProgressChanged( object  sender, DownloadProgressChangedEventArgs E)
        {
             // 下载过程中的进度显示
            progressText.Text  =  e.ProgressPercentage.ToString()  +   " % " ;
            progressRectangle.Width  =  ( double )e.ProgressPercentage  *   2 ;
        }

    }
}