public ActionResult Index()
        {
            NguoiQuanTri manager = (NguoiQuanTri)Session["Admin"];

            if (manager == null)
            {
                return(RedirectToAction("Login"));
            }
            ViewBag.slkhachhang = db.KhachHangs.Count();
            ViewBag.slsanpham   = db.ThuCungs.Count();
            ViewBag.sldonhang   = db.DonDatHangs.Count();
            return(View());
        }
 public ActionResult Login(LoginView model)
 {
     if (ModelState.IsValid)
     {
         string       pass    = MaHoa.MD5(model.Password);
         NguoiQuanTri manager = db.NguoiQuanTris.SingleOrDefault(x => x.Username.Equals(model.Username) && x.Password.Equals(pass));
         if (manager == null)
         {
             ModelState.AddModelError("", "Đăng nhập thất bại");
             return(View("LoginAdmin"));
         }
         Session["Admin"] = manager;
         return(RedirectToAction("Index"));
     }
     return(View("LoginAdmin"));
 }