public ActionResult KichHoat(int id, bool id2)
        {
            PhongHop dmPhong = db.PhongHops.SingleOrDefault(n => n.Id == id);

            dmPhong.Status = id2;
            db.SaveChanges();
            return(RedirectToAction("DanhSach"));
        }
        public ActionResult Xoa(int id)
        {
            PhongHop xoaPhong = db.PhongHops.SingleOrDefault(n => n.Id == id);

            db.PhongHops.Remove(xoaPhong);
            db.SaveChanges();
            TempData["thongbao"] = "<script> $('#div-pthongbao').text('Xóa thành công !'); $('#div-thongbao').show(); $('#div-thongbao').fadeOut(5000);</script>";
            return(RedirectToAction("DanhSach"));
        }
        public ActionResult ThemMoi(PhongHop ph)
        {
            if (KiemTraSession() == true)
            {
                return(RedirectToAction("DangNhap", "QuanTri"));
            }

            if (ModelState.IsValid)
            {
                if (ph.Status == null)
                {
                    ph.Status = false;
                }
                db.PhongHops.Add(ph);
                db.SaveChanges();
                TempData["thongbao"] = "<script>$('#div-pthongbao').text('Tạo mới thành công !'); $('#div-thongbao').show(); $('#div-thongbao').fadeOut(5000);</script>";
            }
            return(RedirectToAction("DanhSach"));
        }
        public ActionResult ChinhSua(PhongHop ph)
        {
            if (KiemTraSession() == true)
            {
                return(RedirectToAction("DangNhap", "QuanTri"));
            }


            if (ModelState.IsValid)
            {
                if (ph.Status == null)
                {
                    ph.Status = false;
                }
                db.Entry(ph).State = System.Data.Entity.EntityState.Modified;
                db.SaveChanges();
                TempData["thongbao"] = "<script>$('#div-pthongbao').text('Cập nhật thành công !'); $('#div-thongbao').show(); $('#div-thongbao').fadeOut(5000);</script>";
            }
            return(RedirectToAction("DanhSach"));
        }