Http请求响应

//   requestUrl：地址?xx=xx
 private string GetContentFromUrll(string  requestUrl)
        {
            string _StrResponse = "";
            HttpWebRequest _WebRequest = (HttpWebRequest)

            WebRequest.Create(requestUrl);   //创建
            _WebRequest.Method = "GET";

            WebResponse _WebResponse = _WebRequest.GetResponse();
            StreamReader _ResponseStream = new StreamReader(_WebResponse.GetResponseStream(), System.Text.Encoding.GetEncoding("UTF-8"));
            _StrResponse = _ResponseStream.ReadToEnd();
            _WebResponse.Close();
            _ResponseStream.Close();
            return _StrResponse;
        }