public string Register(string name, string password, string tel, string select)
        {
            string msg    = string.Empty;
            bool   result = false;

            try
            {
                using (db_EnglishClassEntities db = new db_EnglishClassEntities())
                {
                    tb_User user = new tb_User();
                    user.User_Name = name;
                    user.User_PWD  = password;
                    user.Tel       = tel;
                    user.State     = select;
                    db.tb_User.Add(user);
                    db.SaveChanges();
                    if (user.State == "0")
                    {
                        tb_Plant plant = new tb_Plant();
                        plant.UID   = user.UID;
                        plant.State = "0";
                        db.tb_Plant.Add(plant);
                        db.SaveChanges();
                    }
                    result = true;
                }
            }
            catch (Exception e)
            {
                result = false;
                msg    = e.Message;
            }
            return("{\"result\":\"" + result + "\",\"Msg\":\"" + msg + "\"}");
        }
        public string CheckName(string name, string row)
        {
            int result = 0;

            using (db_EnglishClassEntities db = new db_EnglishClassEntities())
            {
                var user = db.tb_User.Where(x => x.User_Name == name && x.State == row).FirstOrDefault();
                if (user != null)
                {
                    result = 1;
                }
            }
            return("{\"result\":\"" + result + "\"}");
        }
        /// <summary>
        /// 登录
        /// </summary>
        /// <param name="name"></param>
        /// <param name="password"></param>
        /// <param name="select"></param>
        /// <returns></returns>
        public string Login(string name, string password, string select, bool checkbox)
        {
            string Msg    = string.Empty;
            int    result = 0;

            try
            {
                using (db_EnglishClassEntities db = new db_EnglishClassEntities())
                {
                    var user = db.tb_User.Where(x => x.User_Name == name && x.User_PWD == password && x.State == select).FirstOrDefault();
                    if (user != null)
                    {
                        int days = 1;
                        if (checkbox)
                        {
                            days = 30;
                        }
                        result = 1;
                        SetCookie("UserName", user.User_Name, days); //存储用户名
                        SetCookie("UID", user.UID.ToString(), days); //存储用户ID
                        SetCookie("Pstate", user.PState, days);      //存储学生的模式编号
                        SetCookie("State", user.State, days);        //存储用户身份
                    }
                    else
                    {
                        Msg    = "账号或密码错误";
                        result = 0;
                    }
                }
            }
            catch (Exception e)
            {
                result = 0;
                Msg    = e.Message;
            }
            return("{\"result\":\"" + result + "\",\"Msg\":\"" + Msg + "\"}");
        }