ASP.NET post数据到指定页面

/// <summary>
    /// ////post数据
    /// </summary>
    /// <param name="comname"></param>
    /// <param name="alias"></param>
    /// <param name="token"></param>
    /// <returns></returns>

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 = url;                               //提交的参数

            //注意提交的编码 这边是需要改变的 这边默认的是Default：系统当前编码
            byte[] postData = Encoding.UTF8.GetBytes(formData);

            // 设置提交的相关参数 
            HttpWebRequest request = WebRequest.Create(formUrl) as HttpWebRequest;
            Encoding myEncoding = Encoding.UTF8;
            request.Method = "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";
        }
    }