Silverlight Windows Phone 7:从 URL 加载图像

问题描述：

我得到了下面的代码，它试图将网络中的图像加载到图像控件中，当我运行它时，在给定的行上出现错误，提示不允许网络访问:

I got the code below that is trying to load an image from the web into an Image control, when I run it I get an error on the given line that no network access is allowed:

private void button1_Click(object sender, RoutedEventArgs e)
        {
            WebClient webClientImgDownloader = new WebClient();
            webClientImgDownloader.OpenReadCompleted += new OpenReadCompletedEventHandler(webClientImgDownloader_OpenReadCompleted);
            webClientImgDownloader.OpenReadAsync(new Uri("http://dilbert.com/dyn/str_strip/000000000/00000000/0000000/000000/80000/5000/100/85108/85108.strip.print.gif", UriKind.Absolute));
        }

        void webClientImgDownloader_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)
        {
            BitmapImage bitmap = new BitmapImage();
            bitmap.SetSource(e.Result); // ERROR HERE!
            image1.Source = bitmap;
        }

适用于 Windows Phone 7 的 Silverlight

Silverlight for Windows Phone 7

答

尝试使用 WebClient 下载内容将要求源服务器上存在客户端访问策略文件.对于图像，您可以通过这样做来避免此要求:-

Trying to download content with WebClient will require a client access policy file to be present on the source server. For images you can avoid this requirement by doing it like this:-

private void button1_Click(object sender, RoutedEventArgs e)
{
    Uri uri = new Uri("http://dilbert.com/dyn/str_strip/000000000/00000000/0000000/000000/80000/5000/100/85108/85108.strip.print.gif", UriKind.Absolute)
    image1.Source = new BitmapImage(uri);
}

Silverlight Windows Phone 7:从 URL 加载图像

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