public void LoadSanPham() { if (Request.QueryString["url"] != null) { string ulr = Request.QueryString["url"]; Session["url"] = Request.UrlReferrer.ToString(); DAL_KetNoi dao = new DAL_KetNoi(); switch (ulr) { case "Adidas": dtlSanPham.DataSource = dao.LoadSPTheoLoai(1); dtlSanPham.DataBind(); Session["LoaiSP"] = "Adidas"; break; case "Nike": dtlSanPham.DataSource = dao.LoadSPTheoLoai(2); dtlSanPham.DataBind(); Session["LoaiSP"] = "Nike"; break; case "Jordan": dtlSanPham.DataSource = dao.LoadSPTheoLoai(3); dtlSanPham.DataBind(); Session["LoaiSP"] = "Jordan"; break; //case "tk": // string TenSP = Request.QueryString["value"]; // dtlSanPham.DataSource = dao.TimKiemSanPham(TenSP); // dtlSanPham.DataBind(); default: break; } } }