//----------Hiện sản phẩm theo id sản phẩm--------------
    private void HienSanPham()
    {
        MOONLY.Common.SanPham Spham = new MOONLY.Common.SanPham();
        Spham.Idsanpham = int.Parse(Request.QueryString["Idsanpham"]);
        XuLyLaySanPhamByID laySanPhamByID = new XuLyLaySanPhamByID();

        laySanPhamByID.Sanpham = Spham;
        try
        {
            laySanPhamByID.Thucthi();
            txtTenSanPham.Text       = laySanPhamByID.Sanpham.Ten;
            CKEditorControlMoTa.Text = laySanPhamByID.Sanpham.Mota;
            textGia.Text             = laySanPhamByID.Sanpham.Giasanpham.ToString();
            imgHinhSanPham.ImageUrl  = "../HienThiHinhSanPham.ashx?Idhinhsanpham=" +
                                       laySanPhamByID.Sanpham.Idhinhsanpham.ToString();
            dropDanhMucSanPham.SelectedIndex =
                dropDanhMucSanPham.Items.IndexOf(dropDanhMucSanPham.Items.FindByText(
                                                     laySanPhamByID.Sanpham.Danhmucsanpham.Tendanhmucsanpham));
            LuuTamIdHinhSanPham = laySanPhamByID.Sanpham.Idhinhsanpham;
        }
        catch
        {
            Response.Redirect("../Trangloi.aspx");
        }
    }
    private void Hienchitietsanpham()
    {
        SanPham Spham = new SanPham();

        Spham.Idsanpham = int.Parse(Request.QueryString["IdSanPham"]);
        XuLyLaySanPhamByID laySanPham = new XuLyLaySanPhamByID();

        laySanPham.Sanpham = Spham;
        try
        {
            laySanPham.Thucthi();
        }
        catch
        {
            Response.Redirect("Trangloi.aspx");
        }
        dtlChiTietSanPham.DataSource = laySanPham.Ketqua;
        // dtlChiTietSanPham là ID của DataList
        dtlChiTietSanPham.DataBind();
    }