POST 后将位图图像绑定到服务器的返回流

发布于 2024-12-03 16:04:46 字数 853 浏览 4 评论 0原文

我执行正常的 POST 方法，服务器返回一个流，这是一个位图图像，然后我想将 Image1 设置为我得到的该流：

        private void GetResponseCallback(IAsyncResult asynchronousResult)
    {

        HttpWebRequest request = (HttpWebRequest)asynchronousResult.AsyncState;

        // End the operation
        HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(asynchronousResult);
        HttpStatusCode rcode = response.StatusCode;

        Stream stream = response.GetResponseStream();

        Dispatcher.BeginInvoke(() => 
        {
            var bi = new BitmapImage();
            bi.SetSource(stream);
            image1.Source = bi;
        });

        response.Close();
    }

这会出现错误：无法访问已处置的对象。对象名称：“MS.Internal.InternalMemoryStream”。

我明白为什么会出现此错误，这是因为 Stream response.Close();我使用调度程序。如果我不使用调度程序，它将给出无效的跨线程。如何将流设置为我的 image1？

原文

I do a normal POST method and server return a stream, which is a bitmap image, then I want to set my Image1 to that stream that I got:

        private void GetResponseCallback(IAsyncResult asynchronousResult)
    {

        HttpWebRequest request = (HttpWebRequest)asynchronousResult.AsyncState;

        // End the operation
        HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(asynchronousResult);
        HttpStatusCode rcode = response.StatusCode;

        Stream stream = response.GetResponseStream();

        Dispatcher.BeginInvoke(() => 
        {
            var bi = new BitmapImage();
            bi.SetSource(stream);
            image1.Source = bi;
        });

        response.Close();
    }

This give an error: Can not access a disposed object.
Object name: 'MS.Internal.InternalMemoryStream'.

I understand why I got this error, it's because the Stream response.Close(); and I use the Dispatcher. If I don't use Dispatcher it will give invalid-cross thread.
How do I set the stream to my image1?

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