public static string SendMsg(string fxPhone, string fxPassword, string toPhone, string msg)        {            try            {                string url = "u=" + fxPhone + "&";                url = url + "p=";                url = url + fxPassword + "&";                url = url + "to=";                url = url + toPhone + "&";                url = url + "m=" + msg;                string formUrl = "http://quanapi.sinaapp.com/fetion.php";                string formData = http://www.mamicode.com/url;                               //提交的参数"POST";                request.KeepAlive = false;                request.AllowAutoRedirect = true;                request.ContentType = "application/x-www-form-urlencoded";                request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727; .NET CLR  3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)";                request.ContentLength = postData.Length;                // 提交请求数据                 System.IO.Stream outputStream = request.GetRequestStream();                outputStream.Write(postData, 0, postData.Length);                outputStream.Close();                HttpWebResponse response;                Stream responseStream;                StreamReader reader;                string srcString;                response = request.GetResponse() as HttpWebResponse;                responseStream = response.GetResponseStream();                reader = new System.IO.StreamReader(responseStream, Encoding.GetEncoding("UTF-8"));                srcString = reader.ReadToEnd();                string result = srcString;   //返回值赋值                reader.Close();                return result;            }            catch            {                return "error";            }        }

ASP.NET Post方式提交