求高手帮忙修改，谢谢
namespace WindowsFormsApplication4
{
    class Class1
    {
        /// <summary>
        /// 短信测试
        /// </summary>
        /// <returns></returns>
        public string SmsTest()
        {
           
                //创建url连接对象
                Uri servletURL = new Uri("http://125.64.11.43:8080/udt-see/StartServiceServlet");

                //创建客户端请求对象
                WebClient client = new WebClient();
                //设置请求头部样式
                client.Headers.Add("Content-type", "text/html; charset=utf-8");

                //根据指定格式获得时间戳
                string dt = DateTime.Now.ToString("yyyyMMddHHmmss");
                //使用3des将apid和时间戳，密钥加密
                string key = Class1.Encrypt3Des(dt + "用户apid", "密钥");

                //使用json对象拼接参数（也可以自己根据json数据格式，自己使用字符串拼接）
                JSON js = new JSON();
                js.addItem("APID", "用户apid");
                js.addItem("Key", key);
                for (int x = 1; x <= 7; x++)
                {
                    int sno = 0;
                    SqlConnection lo_conn = new SqlConnection("Server=服务器名字或IP;Database=数据库名字;uid=用户名;pwd=密码");
                    lo_conn.Open();
                    SqlCommand lo_cmd = new SqlCommand(); //创建命令对象
                    lo_ = "EXEC SQL SELECT mobile;INTO :smobile;FROM student;WHERE no=:sno;EXEC SQL SELECT course,score;INTO :scourse,:sscore;FROM sc;WHERE no=:sno"; //写SQL语句
                    lo_cmd.Connection = lo_conn; //指定连接对象，即上面创建的
                    SqlDataAdapter dbAdapter = new SqlDataAdapter(lo_cmd); //注意与上面的区分开
                    DataSet ds = new DataSet(); //创建数据集对象
                    dbAdapter.Fill(ds); //用返回的结果集填充数据集，这个数据集可以被能操作数据的控件DataBind
                    lo_conn.Close();
                    sno = sno++;
                    js.addItem("Num", "");
                    js.addItem("Msg", "test");
                }
                js.addItem("TimeStamp", dt);
                js.addItem("IsReport", "1");
                js.addItem("StatusReportUrl", "");
                js.addItem("Parm1", "");
                js.addItem("Parm2", "");
                js.addItem("Parm3", "");

                JSON json = new JSON();
                json.addItem("serviceId", "2010051702");
                json.addItems("params", js.ToString());

                //发送客户端请求到服务器，并获得返回值
                return client.UploadString(servletURL.ToString(), "POST", json.ToString());
        }

        /// <summary>
        /// 3des加密算法
        /// </summary>
        /// <param name="strString"></param>
        /// <param name="strKey"></param>
        /// <returns></returns>
        public static string Encrypt3Des(string strString, string strKey)
        {
            byte[] strbyte = Convert.FromBase64String(strKey);

            strKey = Encoding.UTF8.GetString(strbyte);

            TripleDESCryptoServiceProvider des = new TripleDESCryptoServiceProvider();
            
            des.Key = ASCIIEncoding.ASCII.GetBytes(strKey);
            des.Mode = CipherMode.ECB;

            ICryptoTransform desEncrypt = des.CreateEncryptor();

            byte[] Buffer = ASCIIEncoding.ASCII.GetBytes(strString);
            return Convert.ToBase64String(desEncrypt.TransformFinalBlock(Buffer, 0, Buffer.Length));
        }
    }  



namespace WindowsFormsApplication4
{
    class JSON
    {
        //是否成功   
        private bool success;
        //错误提示信息   
        private string error;
        //总记   
        private int totalCount;
        //数据   
        private string singleInfo;

        private ArrayList arrData;

        #region 初始化JSON的所有对象
        public JSON()
        {
            error = string.Empty;
            singleInfo = string.Empty;
            totalCount = 0;
            success = false;
            arrData = new ArrayList();
        }
        #endregion

        #region 重置JSON的所有对象
        public void ResetJSON()
        {
            error = string.Empty;
            singleInfo = string.Empty;
            totalCount = 0;
            success = false;
            arrData.Clear();
        }
        #endregion

        #region 对象与对象之间分割符
        public void addItemOk()
        {
            arrData.Add("<br>");
        }
        #endregion

        #region 在数组里添加key,value
        public void addItem(string name, string value)
        {
            arrData.Add(name +":" + "\"" + value + "\"");
        }
        #endregion

        #region 在数组里添加key,value
        public void addItems(string name, string value)
        {
            arrData.Add(name + ":"  + value);
        }
        #endregion


        #region 返回组装好的json字符串
        public override string ToString()
        {
            StringBuilder sb = new StringBuilder();
            

            int index = 0;
            sb.Append("{");
            if (arrData.Count <= 0)
            {
                sb.Append("}]");
            }
            else
            {
                foreach (string val in arrData)
                {
                    index++;

                    if (val != "<br>")
                    {
                        sb.Append(val + ",");
                    }
                    else
                    {
                        sb = sb.Replace(",", "", sb.Length - 1, 1);
                        sb.Append("},");
                        if (index < arrData.Count)
                        {
                            sb.Append("{");
                        }
                    }

                }
                sb = sb.Replace(",", "", sb.Length - 1, 1);
            }

            sb.Append("}");
            return sb.ToString();

        }
        #endregion
        public string errorS
        {
            get
            {
                return this.error;
            }
            set
            {
                this.error = value;
            }
        }

        public bool successS
        {
            get
            {
                return this.success;
            }
            set
            {
                this.success = value;
            }
        }

        public int totalCountS
        {
            get
            {
                return this.totalCount;
            }
            set
            {
                this.totalCount = value;
            }
        }

    }
}