Question

我需要使用POST将字符串发布到服务器并获取xml响应，状态代码是正常但字符串响应总是=“”（0字节）。我的代码有什么问题吗？我从黑莓检查服务器，工作正常所以问题必须来自我的代码：

        protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
    {
        s = NavigationContext.QueryString["parameter1"];
        //string strConnectUrl = "http://www.contoso.com/example.aspx";
        base.OnNavigatedTo(e);
  //      DoWebClient(s);
        try
        {

            HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(strConnectUrl);
            httpWebRequest.Method = "POST";
            httpWebRequest.ContentType = "application/x-www-form-urlencoded;charset=UTF-8";
            // start the asynchronous operation
            httpWebRequest.BeginGetRequestStream(new AsyncCallback(GetRequestStreamCallback), httpWebRequest);
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.ToString());
        }
    }

    private static void GetRequestStreamCallback(IAsyncResult asynchronousResult)
    {
       // string XML_REQUEST = "<?xml version=\"1.0\"?><mybroker"><getConnections></mybroker>";
        string post = "?&track=love";

        try
        {
            HttpWebRequest request = (HttpWebRequest)asynchronousResult.AsyncState;

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

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

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

            // Start the asynchronous operation to get the response
            request.BeginGetResponse(new AsyncCallback(GetResponseCallback), request);
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.ToString());
        }
    }
    static Stream str;
    static string st;
    private static void GetResponseCallback(IAsyncResult asynchronousResult)
    {

            HttpWebRequest request = (HttpWebRequest)asynchronousResult.AsyncState;

            // End the operation
            HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(asynchronousResult);
            HttpStatusCode rcode = response.StatusCode;
            Stream streamResponse = response.GetResponseStream(); 
            StreamReader streamRead = new StreamReader(streamResponse);

        //****THIS ALWAYS RETURN "" VALUE, EXPECT TO RETURN XML STRING****
            string responseString = streamRead.ReadToEnd();

            //Console.WriteLine(responseString);
            // Close the stream object
            streamResponse.Close();
            streamRead.Close();
            // Release the HttpWebResponse
            response.Close(); 
    }

的的 *编辑** 代码工作，但是服务器返回参数需要在我想的Silverlight框架中不允许的＆符号（＆amp;），删除＆amp; char服务器响应，但结果不正确。我会问一个新的问题，请参考这个Ampersand

Answer 1

使用Fiddler检查过你的电话。服务器返回一个空体。您的代码工作正常。问题是服务器端。

Answer 2

Fiddler说请求很好，而且响应确实是空白的。如果它是从Blackberry运行而不是从WP7运行，那么服务器是否可以进行一些用户代理检查而不返回任何内容，因为它无法识别WP7用户代理？

此外，看起来你正在发布一个查询字符串（“？＆amp; track = love”），这有点不寻常。您确定在您的请求中发送的数据是正确的吗？

Answer 3

帖子的价值应该是“track = love”。

我尝试过它但是响应是gzip编码的。

使用POST方法的httpWebRequest - 接收意外的xml响应

3 个答案: