// Index
public ActionResult Index(int?page = 1)
{
List <SanPham> dsdt = dtdt.getllDienThoai();
List <SanPham> dssphot = dtdt.getSpHot();
List <SanPham> dsspm = dtdt.getSpMoi();
List <SanPham> dsqc = dtdt.SPquangcao();
int ps = 4;
int pages = (page ?? 1);
ViewBag.DanhSachSP = dsdt.ToPagedList(pages, ps);
ViewBag.SanPhamHot = dssphot;
ViewBag.SanPhamMOi = dsspm;
ViewBag.SPquangcao = dsqc;
return(View());
}