windows-phone-7 - 我怎样才能从 WP7 中的服务器获得响应？

Question

我正在尝试使用 WP7 上的 HttpWebRequest 类发送请求，但没有收到任何响应...这是我的代码:

            InitializeComponent();
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://www.google.com/");
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream dataStream = response.GetResponseStream();
            StreamReader reader = new StreamReader(dataStream);
            tbResponse.Text = reader.ReadToEnd();

            // Cleanup the streams and the response.
            reader.Close();
            dataStream.Close();
            response.Close();
            Console.ReadLine();

此外，我使用此扩展名:click here , 但我在 Windows 控制台应用程序上测试它并没有任何问题，所以我认为问题是我对 WP7 不了解。

Answer 1

您需要像这样发出异步请求:

var webRequest = (HttpWebRequest)HttpWebRequest.Create(Url);
webRequest.BeginGetResponse(new AsyncCallback(request_CallBack), webRequest );

和响应处理程序:

void request_CallBack(IAsyncResult result)
{
        var webRequest = result.AsyncState as HttpWebRequest;
        var response = (HttpWebResponse)WebRequest.EndGetResponse(result);
        var baseStream = response.GetResponseStream();

            // if you want to read binary response
            using (var reader = new BinaryReader(baseStream))
            {
                DataBytes = reader.ReadBytes((int)baseStream.Length);
            }

            // if you want to read string response
            using (var reader = new StreamReader(baseStream))
            {
                Result = reader.ReadToEnd();
            }
}

这是我开发的一个帮助程序类，用于在开发 Windows Phone 7 应用程序期间处理我的 Web 请求需求:

http://www.manorey.net/mohblog/?p=17&preview=true