public ActionResult ProductSave(int?page, int id_save)
 {
     PagedList.IPagedList <Product> list;
     if (id_save < 1)
     {
         list = DALSanPham.GetSanPhanGiamGia(page);
     }
     else
     {
         list = DALSanPham.GetSanPhanGiamGia(page, id_save);
     }
     if (list.Count < 1)
     {
         list = DALSanPham.GetAllSanPhamPhanTrang(null, page);
     }
     return(View(list));
 }
 public ActionResult Index(string hangsx, int?page)
 {
     ViewBag.hangsx = hangsx;
     return(View(DALSanPham.GetAllSanPhamPhanTrang(hangsx, page)));
 }