C# Metro 应用程序如何从网络加载图像

Question

我在 Canvas 上添加了 Windows.UI.Xaml.Controls.Image。我正在使用 HttpClient 进行 http 调用以下载图像。我将图像作为流获取并添加为 BitmapImage 对象的源，但未加载图像。谁能告诉我我做错了什么

代码:

        var httpClient = new HttpClient();
        var content = await httpClient.GetStreamAsync(imageUrl);


            var ras = new InMemoryRandomAccessStream();
            await content.CopyToAsync(ras.AsStreamForWrite());
            bitmap = new BitmapImage();
            bitmap.SetSource(ras);

            myImage.Source = bitmap;

Answer 1

我设法让它工作了。下面是代码:

     var httpClient = new HttpClient();            
     var contentBytes = await httpClient.GetByteArrayAsync(uri);                          
     var ims = new InMemoryRandomAccessStream();                
     var dataWriter = new DataWriter(ims);
     dataWriter.WriteBytes(contentBytes);
     await dataWriter.StoreAsync();
     ims.Seek(0);

     bitmap = new BitmapImage();                
     bitmap.SetSource(ims);                

     myImage.Source = bitmap;