一个比较完整的短信接口帮助类参考

    /// <summary>
    /// 短信接口帮助类
    /// 
    /// 
    /// 修改纪录
    /// 
    /// 2016-07-02 版本：1.0 SongBiao 创建文件。
    /// 
    /// <author>
    ///     <name>SongBiao</name>
    ///     <date>2016-07-02</date>
    /// </author>
    /// </summary>

    public class MobilleMessageHelper
    {
        /// <summary>
        /// 短信服务地址
        /// </summary>
        const string Url = "http://XXXX.com/api/MsgSend.asmx";
        /// <summary>
        /// 短信账号
        /// </summary>
        const string UserCode = "xxxxx";
        /// <summary>
        /// 短信密码
        /// </summary>
        const string UserPass = "yyyyy";
        /// <summary>
        /// 签名
        /// </summary>
        public const string Signature = "【宜宾鸿辉】";
        /// <summary>
        /// 通道号
        /// </summary>
        const string  Channel="178";
        /// <summary>
        /// 扩展号
        /// </summary>
        const string  ExeNo="扩展号";

        #region http 请求及加密
        /// <summary>
        /// http get请求
        /// </summary>
        /// <param name="url"></param>
        /// <param name="data"></param>
        /// <returns></returns>
        public static string HttpGet(string url, string data)
        {
            try
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url + "?" + data);
                request.Method = "GET";
                request.ContentType = "text/html;charset=UTF-8";
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                Stream myResponseStream = response.GetResponseStream();
                StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
                string retString = myStreamReader.ReadToEnd();
                myStreamReader.Close();
                myResponseStream.Close();
                return retString;
            }
            catch (Exception ex)
            {
                return ex.Message;
            }
        }

        /// <summary>
        ///  http post请求
        /// </summary>
        /// <param name="url"></param>
        /// <param name="data"></param>
        /// <returns></returns>
        public static string HttpPost(string url, string data)
        {
            try
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
                request.Method = "POST";
                request.ContentType = "application/x-www-form-urlencoded";
                byte[] info = Encoding.UTF8.GetBytes(data);
                using (Stream stream = request.GetRequestStream())
                {
                    stream.Write(info, 0, info.Length);
                }
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                Stream myResponseStream = response.GetResponseStream();
                StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
                string retString = myStreamReader.ReadToEnd();
                myStreamReader.Close();
                myResponseStream.Close();
                return retString;
            }
            catch (Exception ex)
            {
                return ex.Message;
            }
        }

        /// <summary>
        /// DES加密
        /// </summary>
        /// <param name="str"></param>
        /// <param name="key"></param>
        /// <returns></returns>
        public static string EncodeStr(string str, string key) 
        {
            try
            {
                DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
                provider.Key = Encoding.ASCII.GetBytes(key.Substring(0, 8));
                provider.IV = Encoding.ASCII.GetBytes(key.Substring(0, 8));
                byte[] bytes = Encoding.GetEncoding("GB2312").GetBytes(str);
                MemoryStream stream = new MemoryStream();
                CryptoStream stream2 = new CryptoStream(stream, provider.CreateEncryptor(), CryptoStreamMode.Write);
                stream2.Write(bytes, 0, bytes.Length);
                stream2.FlushFinalBlock();
                StringBuilder builder = new StringBuilder();
                foreach (byte num in stream.ToArray())
                {
                    builder.AppendFormat("{0:X2}", num);
                }
                stream.Close();
                return builder.ToString();
            }
            catch (Exception ex) 
            { 
                return ex.Message; 
            }
        }

        /// <summary>
        /// //SHA1加密
        /// </summary>
        /// <param name="strSha1In"></param>
        /// <returns></returns>
        public static string SHA1Hash(string strSha1In)
        {
            SHA1 sha1 = new SHA1CryptoServiceProvider();
            byte[] bytesSha1In = UTF8Encoding.Default.GetBytes(strSha1In);
            byte[] bytesSha1Out = sha1.ComputeHash(bytesSha1In);
            string strSha1Out = BitConverter.ToString(bytesSha1Out);
            strSha1Out = strSha1Out.Replace("-", "");
            return strSha1Out;
        }
 
        #endregion

        /*
        返回值类型
        string
        成功返回值
        返回用户金额的数字
        失败返回值
        返回带负号的失败代码
         */
        
        #region 余额查询
        /// <summary>
        /// POST方式请求 余额查询
        /// </summary>
        /// <returns></returns>
        public static string GetBalanceByPost()
        {
            StringBuilder sb = new StringBuilder();
            sb.Append("userCode="+UserCode+"&");
            sb.Append("userPass="+UserPass);

            string result = HttpPost(Url + "/GetBalance", sb.ToString());
            return result;
        }

        /// <summary>
        /// Get方式请求 余额查询
        /// </summary>
        /// <returns></returns>
        public static string GetBalanceByGet()
        {
            StringBuilder sb = new StringBuilder();
            sb.Append("userCode="+UserCode+"&");
            sb.Append("userPass="+UserPass);

            string result = HttpGet(Url + "/GetBalance", sb.ToString());
            return result;
        }

        //private void getbalance()
        //{
        //    TopenServiceReference.MsgSendSoapClient topen = new TopenServiceReference.MsgSendSoapClient();
        //    string userName = "用户名";
        //    string passWord = "密码";
        //    string sendResult = topen.GetBalance(userName, passWord);

        //    //然后，根据返回的sendResult作相应处理
        //} 
        #endregion

        /*
        返回值类型
        string
        成功返回值
        返回本次提交的批次号(如:2114355899380234221),(或叫序列号、流水号等，提交一次返回一个)
        失败返回值
        返回带负号的失败代码
        */
        #region 短信发送
        /// <summary>
        /// POST方式请求 短信发送 手机号码，多个号码用英文半角逗号分隔例如：13900000000,13900000001每次提交不多于500个号码 
        /// </summary>
        /// <param name="desNo"></param>
        /// <param name="msg"></param>
        /// <returns>返回本次提交的批次号(如:2114355899380234221),(或叫序列号、流水号等，提交一次返回一个) ;失败返回值 返回带负号的失败代码</returns>
        public static string SendMsgByPost(string desNo, string msg)
        {
            StringBuilder sb = new StringBuilder();
            sb.Append("userCode="+UserCode+"&");
            sb.Append("userPass="+UserPass+"&");
            sb.Append("DesNo="+desNo+"&");
            sb.Append("Msg="+msg+Signature+"&");
            sb.Append("Channel="+Channel);

            string result = HttpPost(Url + "/sendMes", sb.ToString());
            return result;
        }

        /// <summary>
        /// Get方式请求 短信发送 手机号码，多个号码用英文半角逗号分隔例如：13900000000,13900000001每次提交不多于500个号码 
        /// </summary>
        /// <param name="desNo"></param>
        /// <param name="msg"></param>
        /// <returns>返回本次提交的批次号(如:2114355899380234221),(或叫序列号、流水号等，提交一次返回一个) ;失败返回值 返回带负号的失败代码</returns>
        public static string SendMsgByGet(string desNo, string msg)
        {
            StringBuilder sb = new StringBuilder();
            sb.Append("userCode="+UserCode+"&");
            sb.Append("userPass="+UserPass+"&");
            sb.Append("DesNo="+desNo+"&");
            sb.Append("Msg="+msg+Signature+"&");
            sb.Append("Channel="+Channel);

            string result = HttpGet(Url + "/sendMes", sb.ToString());
            return result;
        }

        /// <summary>
        /// /POST方式请求 加密短信发送 手机号码，多个号码用英文半角逗号分隔例如：13900000000,13900000001每次提交不多于500个号码 
        /// </summary>
        /// <param name="desNo"></param>
        /// <param name="msg"></param>
        /// <returns>返回本次提交的批次号(如:2114355899380234221),(或叫序列号、流水号等，提交一次返回一个) ;失败返回值 返回带负号的失败代码</returns>
        public static string SendMsgEncryptByPost(string desNo, string msg)
        {
            string encryptCode =
                EncodeStr(
                    "userPass=" + UserPass + "&DesNo=" + desNo + "&Msg=" + msg + Signature + "&Channel=" + Channel,
                    SHA1Hash(UserPass));
            StringBuilder sb = new StringBuilder();
            sb.Append("userCode="+UserCode+"&");
            sb.Append("submitInfo="+encryptCode);
            string result = HttpPost(Url + "/sendMsgByEncrypt", sb.ToString());

            return result;
        }

        /// <summary>
        /// Get方式请求 加密短信发送 手机号码，多个号码用英文半角逗号分隔例如：13900000000,13900000001每次提交不多于500个号码 
        /// </summary>
        /// <param name="desNo"></param>
        /// <param name="msg"></param>
        /// <returns>返回本次提交的批次号(如:2114355899380234221),(或叫序列号、流水号等，提交一次返回一个) ;失败返回值 返回带负号的失败代码</returns>
        public static string SendMsgEncryptByGet(string desNo, string msg) 
        {
            string encryptCode=EncodeStr("userPass="+UserPass+"&DesNo="+desNo+"&Msg="+msg+Signature+"&Channel="+Channel,SHA1Hash(UserPass));
            StringBuilder sb = new StringBuilder();
            sb.Append("userCode="+UserCode+"&");
            sb.Append("submitInfo="+encryptCode);
            string result = HttpGet(Url + "/sendMsgByEncrypt", sb.ToString());

            return result;
        }

        /// <summary>
        ///  POST方式请求 个性化短信发送
        /// 例如,需发送如下短信
        /// 13800000000 王某某，明天记得要开会【123】
        /// 13800000000 张某某，明天记得要开会【123】
        /// 13800000000 李某某，明天记得要开会【123】
        /// 最终拼接url如下：http://yes.itissm.com/api/IndividualSm.aspx?account=admin1&pwd=123&channel=37&msg=13800000000|!|王某某，明天记得要开会【123】|^|13900000000|!|张某某，明天记得要开会【123】|^|18600000000|!|李某某，明天记得要开会【123】
        /// </summary>
        /// <param name="msg">短信内容为utf-8编码每条个性化短信以英文|^|分割，号码与短信内容以英文|!|分割</param>
        /// <returns>返回本次提交的批次号(如:2114355899380234221),(或叫序列号、流水号等，提交一次返回一个) ;失败返回值 返回带负号的失败代码</returns>
        public static string IndividUalsmByPost(string msg)
        {
            StringBuilder sb = new StringBuilder();
            sb.Append("account="+UserCode+"&");
            sb.Append("pwd="+UserPass+"&");
            sb.Append("Channel="+Channel+"&");
            //sb.Append("Msg=手机号|!|短信内容【签名】|^|手机号|!|短信内容【签名】|^|");
            sb.Append("Msg="+msg);

            string result = HttpPost(Url,sb.ToString());
            return result;
        }

        //private void SendSms() //webservice请求方式
        //{
        //    TopenServiceReference.MsgSendSoapClient topen = new TopenServiceReference.MsgSendSoapClient();
        //    string userName = "用户名";
        //    string passWord = "密码";
        //    string mobiles = "13900000000,13800000000,13100000000,……";
        //    string msgContent = "短信内容(含签名)";
        //    string channel = "由拓鹏给您的通道编号";
        //    string sendResult = topen.sendMes(userName, passWord, mobiles, msgContent, channel); //此处的sendMes可能因接口文档不同而不同，请注意。返回批次号，可保存下来，作为获取发送报告凭据

        //    //然后，根据返回的sendResult作相应处理
        //} 
        #endregion

        #region 短信扩展发送
        /// <summary>
        ///  POST方式请求 短信扩展发送
        /// </summary>
        /// <returns></returns>
        public static string SendMsgExtByPost(string desNo,string msg)
        {
            StringBuilder sb = new StringBuilder();
            sb.Append("userCode="+UserCode+"&");
            sb.Append("userPass="+UserPass+"&");
            sb.Append("DesNo="+desNo+"&");
            sb.Append("Msg="+msg+Signature+"&");
            sb.Append("Channel="+Channel+"&");
            sb.Append("ExeNo="+ExeNo);
            string result = HttpPost(Url + "/sendMesExt", sb.ToString());
            return result;
        }

        /// <summary>
        ///  Get方式请求 短信扩展发送
        /// </summary>
        /// <returns></returns>
        public static string SendMsgExtByGet(string desNo,string msg)
        {
            StringBuilder sb = new StringBuilder();
            sb.Append("userCode="+UserCode+"&");
            sb.Append("userPass="+UserPass+"&");
            sb.Append("DesNo="+desNo+"&");
            sb.Append("Msg="+msg+Signature+"&");
            sb.Append("Channel="+Channel+"&");
            sb.Append("ExeNo="+ExeNo);
            string result = HttpGet(Url + "/sendMesExt", sb.ToString());
            return result;
        }
        #endregion
     
        #region 获取状态报告
        /// <summary>
        ///  POST方式请求 获取状态报告
        /// </summary>
        /// <returns></returns>
        public static string GetReport2ByPost()
        {
            StringBuilder sb = new StringBuilder();
            sb.Append("userCode="+UserCode+"&");
            sb.Append("userPass="+UserPass);

            string result = HttpPost(Url + "/GetReport2", sb.ToString());
            return result;
        }

        /// <summary>
        ///  Get方式请求 获取状态报告
        /// </summary>
        /// <returns></returns>
        public static string GetReport2ByGet()
        {
            StringBuilder sb = new StringBuilder();
            sb.Append("userCode="+UserCode+"&");
            sb.Append("userPass="+UserPass);

            string result = HttpGet(Url + "/GetReport2", sb.ToString());
            return result;
        } 

        /// <summary>
        /// POST方式请求加密 获取状态报告
        /// </summary>
        /// <returns></returns>
        public static string GetReport2EncryptByPost()
        {
            string encryptCode=EncodeStr("userPass="+UserPass,SHA1Hash(UserPass));
            StringBuilder sb = new StringBuilder();
            sb.Append("userCode="+UserCode+"&");
            sb.Append("submitInfo="+encryptCode);

            string result = HttpPost(Url + "/GetReport2ByEncrypt", sb.ToString());

            return result;
        }

        /// <summary>
        /// Get方式请求加密 获取状态报告
        /// </summary>
        /// <returns></returns>
        public static string GetReport2EncryptByGet() 
        {
            string encryptCode=EncodeStr("userPass="+UserPass,SHA1Hash(UserPass));
            StringBuilder sb = new StringBuilder();
            sb.Append("userCode="+UserCode+"&");
            sb.Append("submitInfo="+encryptCode);

            string result = HttpGet(Url + "/GetReport2ByEncrypt", sb.ToString());
            return result;
        }
        #endregion

        #region 获取回复
        /// <summary>
        /// POST方式请求 获取回复
        /// </summary>
        /// <returns></returns>
        public static string GetMo2ByPost()
        {
            StringBuilder sb = new StringBuilder();
            sb.Append("userCode="+UserCode+"&");
            sb.Append("userPass="+UserPass);
            string result = HttpPost(Url + "/GetMo2", sb.ToString());
            return result;
        }

        /// <summary>
        ///  Get方式请求 获取回复
        /// </summary>
        /// <returns></returns>
        public static string GetMo2ByGet()
        {
            StringBuilder sb = new StringBuilder();
            sb.Append("userCode="+UserCode+"&");
            sb.Append("userPass="+UserPass+"&");
            string result = HttpGet(Url + "/GetMo2", sb.ToString());
            return result;
        }
        /// <summary>
        /// POST方式请求 获取回复（加密）
        /// </summary>
        /// <returns></returns>
        public static string GetMo2EncryptByPost()
        {
            string encryptCode=EncodeStr("userPass="+UserPass,SHA1Hash(UserPass));
            StringBuilder sb = new StringBuilder();
            sb.Append("userCode="+UserCode+"&");
            sb.Append("submitInfo="+encryptCode);
            string result = HttpPost(Url + "/GetMo2ByEncrypt", sb.ToString());
            return result;
        }
        /// <summary>
        /// Get方式请求 获取回复（加密）
        /// </summary>
        /// <returns></returns>
        public static string GetMo2EncryptByGet()
        {
            string encryptCode = EncodeStr("userPass=密码", SHA1Hash(UserPass));
            StringBuilder sb = new StringBuilder();
            sb.Append("userCode="+UserCode+"&");
            sb.Append("submitInfo="+encryptCode);
            string result = HttpGet(Url + "/GetMo2ByEncrypt", sb.ToString());
            return result;
        }        
        #endregion

        #region 获取关键字
        /// <summary>
        ///  POST方式请求 获取关键字
        /// </summary>
        /// <returns></returns>
        public static string GetKeywordsByPost()
        {
            StringBuilder sb = new StringBuilder();
            sb.Append("userCode="+UserCode+"&");
            sb.Append("userPass="+UserPass+"&");
            sb.Append("Channel="+Channel);
            string result = HttpPost(Url + "/GetKeyWords", sb.ToString());
            return result;
        }

        /// <summary>
        /// Get方式请求 获取关键字
        /// </summary>
        /// <returns></returns>
        public static string GetKeywordsByGet() 
        {
            StringBuilder sb = new StringBuilder();
            sb.Append("userCode="+UserCode+"&");
            sb.Append("userPass="+UserPass+"&");
            sb.Append("Channel="+Channel);
            string result = HttpGet(Url + "/GetKeyWords", sb.ToString());
            return result;
        } 
        #endregion

    }

    /// <summary>
    /// 手机短信 云信状态枚举
    /// </summary>
    public enum YunXinMessageStatus
    {
        /// <summary>
        /// -1 应用程序异常
        /// </summary>
        [EnumDescription("应用程序异常")]
        ApplicationError = -1,

        /// <summary>
        ///  -3 用户名密码错误或者用户无效
        /// </summary>
        [EnumDescription("用户名密码错误或者用户无效")]
        AccountError = -3,

        /// <summary>
        ///  -5 签名不正确(格式为:XXX【签名内容】), 注意：短信内容最后一个字符必须是】
        /// </summary>
        [EnumDescription("签名不正确")]
        SignatureError = -5,

        /// <summary>
        ///  -6:keyWords 含有关键字keyWords(keyWords为敏感内容，如：-6:促销)
        /// </summary>
        [EnumDescription("含有关键字")]
        KeyWordsNotAllow = -6,

        /// <summary>
        ///  -7 余额不足
        /// </summary>
        [EnumDescription("余额不足")]
        BalanceNotEnough = -7,

        /// <summary>
        ///   -8 没有可用的通道，或不在时间范围内
        /// </summary>
        [EnumDescription("余额不足")]
        ChannelNoAvailable = -8,

        /// <summary>
        ///  -9 发送号码一次不能超过1000个
        /// </summary>
        [EnumDescription("发送号码一次不能超过1000个")]
        SendTooManyNumbers = -9,

        /// <summary>
        ///  -10 号码数量大于允许上限（不设置上限时，不可超过1000）
        /// </summary>
        [EnumDescription("号码数量大于允许上限（不设置上限时，不可超过1000）")]
        SendOverLimit = -10,

        /// <summary>
        ///  -11 号码数量小于允许下限
        /// </summary>
        [EnumDescription("号码数量小于允许下限")]
        SendLessLimit = -11,

        /// <summary>
        ///  -12 模板不匹配
        /// </summary>
        [EnumDescription("模板不匹配")]
        TemplateMismatch = -12,

        /// <summary>
        ///  -13 Invalid Ip ip绑定用户，未绑定该ip
        /// </summary>
        [EnumDescription("ip绑定用户，未绑定该ip")]
        InvalidIp = -13,

        /// <summary>
        ///  -14 用户黑名单
        /// </summary>
        [EnumDescription("用户黑名单")]
        UserBlackList = -14,

        /// <summary>
        ///  -15 系统黑名单
        /// </summary>
        [EnumDescription("系统黑名单")]
        SystemBlackList = -15,

        /// <summary>
        ///  -16 号码格式错误
        /// </summary>
        [EnumDescription("号码格式错误")]
        NumberFormatError = -16,

        /// <summary>
        ///  -17 无效号码（格式正常，可不是正确的电话号码，如12345456765）
        /// </summary>
        [EnumDescription("无效号码")]
        InvalidNumber = -17,

        /// <summary>
        /// -18 没有设置用户的固定下发扩展，不能自定义扩展
        /// </summary>
        [EnumDescription("没有设置用户的固定下发扩展，不能自定义扩展")]
        CannotCustomizeExtension = -18,

        /// <summary>
        /// -19 强制模板通道，不能使用个性化接口
        /// </summary>
        [EnumDescription("强制模板通道，不能使用个性化接口")]
        CanNotUsePersonalized = -19,

        /// <summary>
        /// -20 包含非法字符
        /// </summary>
        [EnumDescription("包含非法字符")]
        ContainsIllegalCharacters = -20,

        /// <summary>
        /// -21 没有找到对应的submitID设置
        /// </summary>
        [EnumDescription("没有找到对应的submitID设置")]
        NoSubmitID = -21,

        /// <summary>
        /// -22 解密失败
        /// </summary>
        [EnumDescription("解密失败")]
        DecryptionFailure = -22,

        /// <summary>
        /// -23 查询余额过频繁（至少间隔10秒）
        /// </summary>
        [EnumDescription("查询余额过频繁（至少间隔10秒）")]
        QueryBalanceTooFrequent = -23,

    }