public ActionResult Danhsachtaikhoan()
        {
            DangnhapDao dangnhapDao = new DangnhapDao();

            ViewData["danhsachtk"] = dangnhapDao.getDanhsachtaikhoan();
            return(View());
        }
        public ActionResult Login(loginModel model)
        {
            var dao    = new DangnhapDao();
            var result = dao.Login(model.userName, Encrypt.MD5Hash(model.password));

            if (result)
            {
                var user = dao.getThongtintaikhoan(model.userName);
                dao.setTrangthaidangnhap(user, 1);
                Session.Add(Constants.USER_SESSION, user);
                return(RedirectToAction("Index", "Admin"));
            }
            else
            {
                ModelState.AddModelError("", "Email hoặc password không đúng");
            }
            return(View(model));
        }