public ItemGioHang(int maSP, int sl) { using (smart_shopEntities db = new smart_shopEntities()) { sanpham sp = db.sanphams.Single(n => n.MaSanPham == maSP); MaSP = maSP; TenSP = sp.TenSanPham; SoLuong = sl; HinhAnh = sp.HinhAnh1; DonGia = sp.DonGia; //ThanhTien = SoLuong * DonGia; } }