c# - 为什么当我执行 BeginGetRequestStream 时会收到 ProtocolViolationException

Question

我是 silverlight 新手。我正在针对 Windows Phone 的 Visual Studio 2010 中进行编程。我尝试执行 HttpWebRequest 但调试器显示 ProtocolViolationException。这是我的代码

 private void log_Click(object sender, RoutedEventArgs e)
        {
            //auth thi is my url for request
            string auth;
            string login = Uri.EscapeUriString(this.login.Text);
            string password = Uri.EscapeUriString(this.pass.Password);
            auth = "https://api.vk.com/oauth/token";
            auth += "?grant_type=password" + "&client_id=*****&client_secret=******&username=" + login + "&password=" + password + "&scope=notify,friends,messages";
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(auth);
            request.BeginGetRequestStream(RequestCallBack, request);//on this line debager say ProtocolViolationExceptio
        }

        void RequestCallBack(IAsyncResult result)
        {
            HttpWebRequest request = result.AsyncState as HttpWebRequest;
            Stream stream = request.EndGetRequestStream(result);
            request.BeginGetResponse(ResponceCallBack, request);
        }
        void ResponceCallBack(IAsyncResult result)
        {
            HttpWebRequest request = result.AsyncState as HttpWebRequest;
            HttpWebResponse response = request.EndGetResponse(result) as HttpWebResponse;
            using (StreamReader sr = new StreamReader(response.GetResponseStream()))
            {
                string a =sr.ReadToEnd();
                MessageBox.Show(a);
            }

        }

Answer 1

我认为问题在于您没有使用 POST，而是使用 GET。试试这个:

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(auth);
request.Method = "POST";
request.BeginGetRequestStream(RequestCallBack, request);