protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { if (!IsPostBack) { OfferedPizza offerPizza = HelperSession.GetOfferPizza(Session); List <Ingredient> listIngredientsAll = HelperSession.GetListIngredientsAll(Session); List <Ingredient> listIngredientsOffer = HelperIngredient.Connect(offerPizza.Ingredients, listIngredientsAll); HelperSession.SetListIngredientsOffer(Session, listIngredientsOffer); GvListIngredients.DataSource = listIngredientsOffer; GvListIngredients.DataBind(); LbTitle.Text = offerPizza.Name; LbPrice.Text = offerPizza.Price.ToString("0.00") + ""; HelperSession.SetListIngredientsSelected(Session, offerPizza.Ingredients); } } }