我有这个code：

        private HttpWebRequest request;
        private HttpWebResponse wResponse;
        private CookieContainer cookieContainer = new CookieContainer();
        #region PRIVATE METHODS
        private void RunRequest(string url)
        {
            request = HttpWebRequest.Create(new Uri(url)) as HttpWebRequest;
            request.UserAgent = "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_7; en-US) AppleWebKit/534.16 (KHTML, like Gecko) Chrome/10.0.648.205 Safari/534.16";
            request.ContentType = "application/x-www-form-urlencoded";
            request.CookieContainer = cookieContainer;
            request.Method = "GET";

            StartWebRequest(request);

            //Do smthng
            while (wResponse == null) { }
        }

        private void StartWebRequest(HttpWebRequest request)
        {
            request.BeginGetResponse(FinishWebRequest, request);
        }

        private void FinishWebRequest(IAsyncResult result)
        {
            wResponse = (result.AsyncState as HttpWebRequest).EndGetResponse(result) as HttpWebResponse;
        }
        #endregion

和wRequest变量不填充任何回应。在AsyncState我有这样的：

And wRequest variable is not filled with any response. In AsyncState I have this:

这可能是什么问题？

P.S。同样的code工作好上了桌面应用程序。

p.s. The same code works good on the desktop-app.

谢谢， 帕维尔。

推荐答案

有在code两个问题。

There are two problems in your code.

您没有正确使用异步回调方法：

You are not properly using asynchronous callback method:

替换

request.BeginGetResponse（FinishWebRequest，请求）;

与

request.BeginGetResponse（新的AsyncCallback（FinishWebRequest），请求）;

指定的Content-Type GET请求是无效的，这是至关重要的 对于POST请求。修改 RunRequest（）方法：

Specifying Content-Type for GET request is invalid, it is essential for POST request. Modify RunRequest() method:

private void RunRequest(string url, string method)
{
    request = HttpWebRequest.Create(new Uri(url)) as HttpWebRequest;
    request.UserAgent = "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_7; en-US) AppleWebKit/534.16 (KHTML, like Gecko) Chrome/10.0.648.205 Safari/534.16";
    request.Method = method; // method can be GET, POST etc.
    if (method == "POST")
        request.ContentType = "application/x-www-form-urlencoded";
    request.CookieContainer = cookieContainer;
    ...
}