protected void Page_Load(object sender, EventArgs e) { string masp = Request.QueryString["masp"]; if (!BUS_SanPham.KTSPTonTai(masp)) { Response.Redirect("Shop_Product.aspx"); } else { DTO_SanPham sp = BUS_SanPham.LaySanPham(masp); imgAnhMinhHoa.ImageUrl = "images/shop/" + sp.AnhMinhHoa; lblTenSP.Text = sp.TenSP; lblGiaTien.Text = sp.GiaTien + "$"; } }