Windows phone 8 尝试加载图像时，Bitmap.SetSourceInternal中的索引超出范围

我犯了这个错误

System.IndexOutOfRangeException: Index was outside the bounds of the array.
at System.Windows.Media.Imaging.BitmapSource.SetSourceInternal(Stream streamSource)

当我尝试加载这样的图像时：

webClient.OpenReadCompleted += new OpenReadCompletedEventHandler(webClient_OpenReadCompleted);
webClient.OpenReadAsync(new Uri("http://zomerparkfeest.nl/uploads/" + currentItem.photo), webClient);

在opReadAsync中：

private void webClient_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)
{
        if (e.Error == null && !e.Cancelled)
        {
            BitmapImage bitMapImage = new BitmapImage();
            bitMapImage.SetSource(e.Result);
            image.Source = bitMapImage;
            loadingImagePBar.Visibility = Visibility.Collapsed;
            imageLocked = false;
        }
 }

---

我并不总是会遇到这种异常，主要是在加载了很多图像之后。有什么问题吗？

谢谢！我认为这解决了问题。我尝试了一段时间后出现了空指针，但似乎无法重新创建它。再次感谢！谢谢我认为这解决了问题。我尝试了一段时间后出现了空指针，但似乎无法重新创建它。再次感谢！谢谢我认为这解决了问题。我尝试了一段时间后出现了空指针，但似乎无法重新创建它。再次感谢！谢谢我认为这解决了问题。我尝试了一段时间后出现了空指针，但似乎无法重新创建它。再次感谢！

Use this by Memory stream this would work fine
   private void webClient_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)
    {
            if (e.Error == null && !e.Cancelled)
            {
                BitmapImage bitMapImage = new BitmapImage();
                Stream content=e.Result;
                           MemoryStream memoryStream = new MemoryStream();
                            content.CopyTo(memoryStream);
                            memoryStream.Position = 0;
                            byte[] buffer = null;

                            if (memoryStream != null && memoryStream.Length > 0)
                            {
                                BinaryReader binaryReader = new BinaryReader(memoryStream);
                                buffer = binaryReader.ReadBytes((int)memoryStream.Length);
                            }
                            Stream stream = new MemoryStream();
                            stream.Write(buffer, 0, buffer.Length);
                            stream.Seek(0, SeekOrigin.Begin);
                             bitMapImage.SetSource(stream);
                image.Source = bitMapImage;
                loadingImagePBar.Visibility = Visibility.Collapsed;
                imageLocked = false;
            }
     }