silverlight1.1里面的System.Windows.Downloader在slight2里面哪去啦?

Question

各位大哥,System.Windows.Downloader那个下载的类哪去了呀?我想载入图片出现进度怎么搞哦?SDK上面那个Demo还是js代码的呦

Answer 1

 

WebClient class. 

 

Code Snippet

 

WebClient webClient = new WebClient();
webClient.DownloadProgressChanged += new DownloadProgressChangedEventHandler(webClient_DownloadProgressChanged);
webClient.OpenReadCompleted += new OpenReadCompletedEventHandler(webClient_OpenReadCompleted);
webClient.DownloadStringAsync(new Uri("http://data.com/resource.xml"));

...

void webClient_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)
{
    if ((e.Error == null) && (e.Cancelled == false))
    {
        Stream stream = e.Result;
    }
}

 

 

参见

http://msdn.microsoft.com/en-us/library/cc189007(vs.95).aspx

Answer 2

 

错误 1 No overload for 'webClient_DownloadProgressChanged' matches delegate 'System.Net.DownloadProgressChangedEventHandler' E:\test\SilverlightApplication1\SilverlightApplication1\Page.xaml.cs 29 50 SilverlightApplication1

孟哥,给偶提示这个错误额

Answer 3

你需要添加处理器函数啊

void webClient_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
{

     // 显示进度的方法
      progressText.Text = e.ProgressPercentage.ToString();
      progressRectangle.Width = (double) e.ProgressPercentage;
}

 

Answer 4

具体例子

http://blog.csdn.net/net_lover/archive/2008/05/05/2396428.aspx

 

Answer 5

 

哇,孟哥太酷了,还特意发了一篇博客

Answer 6

下载bmp文件的时候会提示这个错误

An exception of type 'System.Exception' occurred in System.Windows.dll but was not handled in user code

Additional information: 灾难性故障 (Exception from HRESULT: 0x8000FFFF (E_UNEXPECTED))

png跟jpg的文件没有问题,太感谢啦