WP7应用程序不退出BeginGetResponse并进入回调函数 [英] WP7 app never exits BeginGetResponse and goes into the callback function

问题描述

我有以下代码：

private void GetRequestStreamCallback(IAsyncResult asynchronousResult)
        {
            HttpWebRequest request = (HttpWebRequest)asynchronousResult.AsyncState;

            // End the operation
            Stream postStream = request.EndGetRequestStream(asynchronousResult);

            //Console.WriteLine("Please enter the input data to be posted:");
            //string postData = Console.ReadLine();
            string postData = "my data";

            // Convert the string into a byte array.
            byte[] byteArray = Encoding.UTF8.GetBytes(postData);

            // Write to the request stream.
            postStream.Write(byteArray, 0, postData.Length);
            postStream.Close();

                // Start the asynchronous operation to get the response
                IAsyncResult result =
                      (IAsyncResult)request.BeginGetResponse(new AsyncCallback(GetResponseCallback), request);

        }

        private void GetResponseCallback(IAsyncResult asynchronousResult)
        {
            HttpWebRequest request = (HttpWebRequest)asynchronousResult.AsyncState;

            // End the operation
            HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(asynchronousResult);
            Stream streamResponse = response.GetResponseStream();
            StreamReader streamRead = new StreamReader(streamResponse);
            string responseString = streamRead.ReadToEnd();
            Console.WriteLine(responseString);
            // Close the stream object
            streamResponse.Close();
            streamRead.Close();

            // Release the HttpWebResponse
            response.Close();
            allDone.Set();

            Dispatcher.BeginInvoke((Action)(() => Debug.WriteLine("George")));
        }

然而，当我的代码打BeginGetResponse它永远不会退出（我不打了在GetResponseCallback函数断点）。我试图加入的BeginInvoke电话，但我还是从来没有进入这个方法。此代码在Windows控制台应用程序 - 这是在Windows Phone 7，它doesn'teorg

However when my code hits BeginGetResponse it never exits (and I do not hit a breakpoint in the GetResponseCallback function). I tried adding the BeginInvoke call, but I still never enter this method. This code works in a windows console app - it's on Windows Phone 7 that it doesn'teorg

有人能看到我在做什么错

Can anyone see what I am doing wrong?

感谢。

推荐答案

如果您已经创建了HttpWebRequest的UI线程上，然后确保你不要阻塞UI线程，否则，你可以死锁。

If you have created the HttpWebRequest on the UI thread, then make sure you don't block the UI thread, otherwise you can deadlock.

这已经链接桌面.NET样本不为当前的手机网络堆栈进行了优化。您应该更改代码，以便您创建的HttpWebRequest在后台线程。

The sample from the desktop .NET you have linked isn't optimized for the current phone networking stack. You should change the code so that you create the HttpWebRequest on a background thread.

这篇关于WP7应用程序不退出BeginGetResponse并进入回调函数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！