HttpWebRequest, post method

我的wp 7.1应用程序中的HttpWebRequest有一个小问题。应用程序通过 POST 方法将一些游戏统计信息数据发送到 php 服务器，但服务器不会获取它。$_POST 数组保持为空。在WireShark的帮助下，我可以看到数据在发送到服务器的数据包中，但服务器没有收到任何数据包。

以下是发送数据的方法的代码：

    private void SendStatisticsToServer()
    {
        if (this.stat.Name == String.Empty || Object.ReferenceEquals(this.stat.Name, null))
        {
            this.OnEmptyNameEvent();
        }
        else
        {
            HttpWebRequest request = WebRequest.Create(ADDRESS) as HttpWebRequest;
            request.Method = "POST";
            request.ContentType = "text/plain";
            request.AllowReadStreamBuffering = false;
            request.BeginGetRequestStream(new AsyncCallback(GetRequestStreamCallBack), request);
        }
    }
    private void GetRequestStreamCallBack(IAsyncResult requestRes)
    {
        StringBuilder builder = new StringBuilder("user=");
        builder.Append(this.stat.Name);
        builder.Append("&won=");
        builder.Append(this.stat.Won == true ? "1" : "0");
        builder.Append("&scores=");
        builder.Append(this.stat.Scores.ToString());
        Byte[] byteArray = Encoding.UTF8.GetBytes(builder.ToString());
        HttpWebRequest request = requestRes.AsyncState as HttpWebRequest;
        Stream stream = request.EndGetRequestStream(requestRes);
        stream.Write(byteArray, 0, byteArray.Length);
        stream.Flush();
        stream.Close();
        request.BeginGetResponse(new AsyncCallback(GetResponseCallback), request);
    }
    private void GetResponseCallback(IAsyncResult requestRes)
    {
        HttpWebRequest request = requestRes.AsyncState as HttpWebRequest;
        HttpWebResponse response = request.EndGetResponse(requestRes) as HttpWebResponse;
        Stream stream = response.GetResponseStream();
        StreamReader streamRead = new StreamReader(stream);
        String responseString = streamRead.ReadToEnd();
        stream.Close();
        streamRead.Close();
        response.Close();
        this.OnExitButtonPressedEvent(ButtonType.Exit);
    }

（我很抱歉没有评论的代码，但我认为这是不言自明的）

如您所见，它几乎是从 msdn 复制过来的。

这是php -server代码：

    <?php
     header('Content-type: text/plain'); 
     // HTTP/1.1
     header("Cache-Control: no-store, no-cache, must-revalidate");
     // HTTP/1.0
     header("Pragma: no-cache");
     $logfile = 'postdata.txt';
     $firstData = $_POST["user"];
     $secondData = $_POST["won"];
     $thirdData = $_POST["scores"];
     $file = fopen($logfile, "a+");
     fwrite($file, "Post received - data: firstData=". $firstData . "   
     secondData=" . $secondData . " thirdData=" . $thirdData . "'r'n");
     fclose($file);
     ?>

如您所见，此服务器不执行太多操作 - 仅接收数据并将其推送到日志文件中。

这绝对不是服务器的错误，因为用Qt编写的旧应用程序在相同条件下工作正常，并且$_POST数组不为空。

你能告诉我，哪里可能出现错误？

目标平台是WP 7.1。

事先感谢您的回答。