public ActionResult Index()
        {
            if (Session["Account"] == null) { return Redirect("/Login"); }
            if (!(bool)(Session["Account"] as Account).IsManager) { return Redirect("Student"); }
            StudentDAO studentDAO = new StudentDAO();
            RoomUsageDAO roomUsageDAO = new RoomUsageDAO();
            RequestDAO requestDAO = new RequestDAO();
            int totalStudentInDorm = studentDAO.GetTotalStudentInDorm();
            int waterUsageMonth = roomUsageDAO.GetWaterUseageMonth();
            int electricUsageMonth = roomUsageDAO.GetElectricUseageMonth();
            int requestPending = requestDAO.GetTotalPendingRequest();
            ViewBag.totalStudent = totalStudentInDorm;
            ViewBag.waterUsage = waterUsageMonth;
            ViewBag.electricUsage = electricUsageMonth;
            ViewBag.requestPending = requestPending;
            return View();
        }