听起来这一定是时间问题或随机访问流的问题.

Sounds like this has to be an issue with timing or with random access to the stream.

你可以尝试的事情:

1. 尝试将整个图像加载到内存数组 - MemoryStream - 然后在 SetSource 调用中使用它

1. Try loading the entire image into an in memory array - a MemoryStream - and then use that in the SetSource call

尝试删除未使用的代码 - .ImageOpened 委托和 img = new Image() 调用

Try removing the unused code - the .ImageOpened delegate and the img = new Image() call

如果这些事情没有帮助，那么尝试在字节级别检查两个流.

if those things don't help then try checking the two streams at the byte level.

有关 1 的更多信息，请参阅如何从独立存储加载图像并在设备上显示它? - 请注意，这是 Microsoft 的官方支持示例，它将图像加载到内存中的 MemoryStream 中，然后在屏幕上的图像中使用它.

For more info on 1, see How Do I Load an Image from Isolated Storage and Display it on the Device? - note that this is Microsoft's support official sample and it loads the image into an in memory MemoryStream before using it in the on-screen Image.

微软的代码:

// The image will be read from isolated storage into the following byte array
        byte [] data;

        // Read the entire image in one go into a byte array
        using (IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication())
        {
            // Open the file - error handling omitted for brevity
                                 // Note: If the image does not exist in isolated storage the following exception will be generated:
            // System.IO.IsolatedStorage.IsolatedStorageException was unhandled
            // Message=Operation not permitted on IsolatedStorageFileStream
            using (IsolatedStorageFileStream isfs = isf.OpenFile("WP7Logo.png", FileMode.Open, FileAccess.Read))
            {
                // Allocate an array large enough for the entire file
                data = new byte[isfs.Length];

                // Read the entire file and then close it
                isfs.Read(data, 0, data.Length);
                isfs.Close();
            }
        }

        // Create memory stream and bitmap
        MemoryStream ms = new MemoryStream(data);
        BitmapImage bi = new BitmapImage();

        // Set bitmap source to memory stream
        bi.SetSource(ms);

        // Create an image UI element – Note: this could be declared in the XAML instead
        Image image = new Image();

        // Set size of image to bitmap size for this demonstration
        image.Height = bi.PixelHeight;
        image.Width = bi.PixelWidth;

        // Assign the bitmap image to the image’s source
        image.Source = bi;

        // Add the image to the grid in order to display the bit map
        ContentPanel.Children.Add(image);

请报告修复它的原因.