public ActionResult Index()
        {
            //    List<PieChartModel> dataPoints = new List<PieChartModel>();
            //    dataPoints.Add(new PieChartModel("Samsung", 25));
            //    dataPoints.Add(new PieChartModel("Micromax", 13));
            //    dataPoints.Add(new PieChartModel("Lenovo", 8));
            //    dataPoints.Add(new PieChartModel("Intex", 7));
            //    dataPoints.Add(new PieChartModel("Reliance", 6.8));
            //    dataPoints.Add(new PieChartModel("Others", 40.2));

            //    ViewBag.DataPoints = JsonConvert.SerializeObject(dataPoints);
            var sanphamdao       = new SanPhamDAO();
            var baivietdao       = new BaiVietDAO();
            var hoadondao        = new HoaDonDAO();
            var chitiethoadondao = new ChiTietHoaDonDAO();

            ViewBag.CountProduct       = sanphamdao.CountProduct();
            ViewBag.CountContent       = baivietdao.CountContent();
            ViewBag.CountPendingOrders = hoadondao.CountPendingOrders();
            ViewBag.SumOrder           = chitiethoadondao.SumOrder();
            return(View());
        }