public IActionResult BrandAndSort(string mahang, string sortorder, int?pagenumber)
{
pageNumber = pagenumber ?? 1;
SanPhamBUS sanphambus = new SanPhamBUS();
List <SanPham> list = sanphambus.BrandAndSort(mahang, sortorder, pageSize, pageNumber);
List <SanPham> tong = sanphambus.BrandAndSort(mahang, sortorder, pageSize);
ViewBag.TrangHienTai = pageNumber;
ViewBag.TongTrang = TongTrang(tong);
ViewBag.TrangThai = "brandandsort";
ViewBag.ThuongHieu = mahang;
ViewBag.Sort = sortorder;
List <HangSanPham> hang = ctx.HangSanPham.ToList();
ViewBag.Hang = hang;
return(View("List", list));
}