public ActionResult Sanpham_hang(string metatitle, string hang, int page = 1, int pageSize = 9)
        {
            var newdao = new NewDao();
            var menu   = new MenuDao();

            ViewBag.header = menu.header_hang(metatitle, hang);
            int totalRecord_hang = 0;
            var ListALL          = newdao.sanPH_sp_hang(metatitle, hang, ref totalRecord_hang, page, pageSize);

            ViewBag.Total = totalRecord_hang;
            ViewBag.Page  = page;

            int maxPage   = 5;
            int totalPage = 0;

            totalPage         = (int)Math.Ceiling((double)(totalRecord_hang / pageSize));
            ViewBag.TotalPage = totalPage;
            ViewBag.MaxPage   = maxPage;
            ViewBag.First     = 1;
            ViewBag.Last      = totalPage;
            ViewBag.Next      = page + 1;
            ViewBag.Prev      = page - 1;
            return(View(ListALL));
        }