.net實現傳送手機簡訊功能其實很簡單，只需要呼叫簡訊服務商的介面即可。程式碼如下：

   string url = "{0}?act=send&username={1}&passwd={2}&destnumbers={3}&orgid=38838&msg={4}"; 
 url = String.Format(url, SMSUrl, SMSUser, SMSPwd, recivers.ToString(), HttpUtility.UrlEncode(message, Encoding.GetEncoding("GB2312")));
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create
 
(url); //宣告一個HttpWebRequest請求  
                request.Timeout = 30000;  //設定連線超時時間  
                request.Headers.Set("Pragma", "no-cache");
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();//獲得傳送反饋資訊
                Stream streamReceive = response.GetResponseStream();
                Encoding encoding = Encoding.GetEncoding
 
("GB2312");
                StreamReader streamReader = new StreamReader(streamReceive, encoding);
                strResult = streamReader.ReadToEnd();
                streamReader.Close();
                response.Close();
                if(!string.IsNullOrWhiteSpace(strResult)&&strResult.Contains
 
("state=0"))
                {
                    result.State = true;  //傳送成功
                }
                else
                {
                    result.Msg = strResult;
                }