怎么可以POST音频文件并获得响应WP8 C＃

Question

我正在尝试将音频文件发布到我的Web服务并从服务器获取响应。我在Google上搜索但没有Windows Phone 8的答案。所以请帮助我。

更新1这里我的代码尝试上传音频文件，但服务器上有错误

        byte[] buffer;
    void Upload(Stream fileStream)
    {
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(new Uri("http://localhost:11111/api/SpeechRecognition?dataType=json"));

        request.Method = "POST";
        request.ContentType = "multipart/form-data";
        request.UseDefaultCredentials = true;

        buffer = new byte[(int)fileStream.Length];
        request.BeginGetRequestStream(new AsyncCallback(ReadCallback), request);
    }

    private void ReadCallback(IAsyncResult asynchronousResult)
    {
        HttpWebRequest request = (HttpWebRequest)asynchronousResult.AsyncState;
        // End the operation.            
        Stream postStream = request.EndGetRequestStream(asynchronousResult);
        postStream.Write(buffer, 0, buffer.Length);
        postStream.Close();
        request.BeginGetResponse(new AsyncCallback(ResponseCallback), request);
    }

    private void ResponseCallback(IAsyncResult asynchronousResult)
    {
        HttpWebRequest request = (HttpWebRequest)asynchronousResult.AsyncState;
        HttpWebResponse resp = (HttpWebResponse)request.EndGetResponse(asynchronousResult);
        Stream streamResponse = resp.GetResponseStream();
        StreamReader streamRead = new StreamReader(streamResponse);
        string responseString = streamRead.ReadToEnd();
        Dispatcher.BeginInvoke(new Action(() => { MessageBox.Show(responseString); }));
        // Close the stream object.            
        streamResponse.Close();
        streamRead.Close();
        // Release the HttpWebResponse.            
        resp.Close();
    }

在服务器ASP.NET 4.5中有错误行

await Request.Content.ReadAsMultipartAsync(provider);