发短信

try
            {
                request = (HttpWebRequest)WebRequest.Create("http://221.130.185.108/smsmarketing/wwwroot/api/post_send/");
                //Post请求方式
                request.Method = "POST";
                //内容类型
                request.ContentType = "application/x-www-form-urlencoded";
                //参数
                sSend = "uid=" + sUID + "&pwd=" + sPassWord + "&mobile=" + sMob + "&msg=" + sMsg + "&dtime=" + DateTime.Now.ToString();
                //将发送参数转换为“GB2312” byte数组
                byte[] bSend = Encoding.GetEncoding("GB2312").GetBytes(sSend);
                request.ContentLength = bSend.Length;
                //获得请求流
                Stream writer = request.GetRequestStream();
                //将请求参数写入流
                writer.Write(bSend, 0, bSend.Length);
                //关闭请求流
                writer.Close();
                //获得响应流
                response = (HttpWebResponse)request.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding("GB2312"));
                re = reader.ReadToEnd();
            }
            catch
            {
                return "Error";
            }