///会员登录
        public ActionResult MemberLogin(string userName,string pwd)
        {
            using (var db=new DbEntities())
            {
                var rel = db.Members.FirstOrDefault(m => m.UserName == userName && m.Pwd == pwd);
                if (rel!=null)
                {
                    //TODO  存到Cookie里面,后面通过方法去调用

                }
                //登录成功之后跳转到首页,在首页会显示登录信息
                return RedirectToAction("Index", "Main");
            }
        }
 ///修改用户密码
 public ActionResult MemberUpdateByPwd(string pwd)
 {
     using (var db = new DbEntities())
     {
         //BUG  这里需要读取Id
         var userId = 1;
         var me = db.Members.FirstOrDefault(m => m.Id == userId);
         if (me == null)
             return Json(false);
         me.Pwd = pwd;
         var log = new MemberLog()
         {
             MemberId = me.Id,
             ModifyContent=MemberModifyEnum.ChangePwd,
             ModifyTime=DateTime.Now
         };
         db.MemberLogs.Add(log);
         db.SaveChanges();
         return Json(true);
     }
 }
 ///会员注册
 public ActionResult MemberRead(string userName, string pwd)
 {
     try
     {
         using (var db = new DbEntities())
         {
             var member = new Member()
             {
                 UserName = userName,
                 Pwd = pwd
             };
             db.Members.Add(member);
             db.SaveChanges();
             //TODO  注册成功自动登录,存到Cookie里面,后面通过方法去调用
             return RedirectToAction("Index", "Main");
         }
     }
     catch (Exception)
     {
         return Json(false);
     }
 }