c#单纯发送post请求一个URL得到返回值

string Url = "";string result = "";HttpWebRequest req = (HttpWebRequest)WebRequest.Create(Url);req.Method = "POST";req.ContentLength = 0;//一定要添加这句HttpWebResponse resp = (HttpWebResponse)req.GetResponse();Stream stream = resp.GetResponseStream();//获取内容using (StreamReader reader = new StreamReader(stream, Encoding.UTF8)){result = reader.ReadToEnd();}