protected void lbAggiungiACarrello_Click(object sender, EventArgs e)
    {
        HttpCookie cookieBalestra = Request.Cookies["CookieBalestra"];
        if (cookieBalestra == null)
        {
            HttpCookie nuovoCookieBalestra = new HttpCookie("CookieBalestra");
            nuovoCookieBalestra.Expires = DateTime.Now.AddYears(3);
            Response.Cookies.Add(nuovoCookieBalestra);
            cookieBalestra = nuovoCookieBalestra;
            Label2.Text += "nuovo cookie creato";

        }
        try
        {
            foreach (GridViewRow gvr in gvAnnateVino.Rows)
            {
                int IDAnnata = 0;
                int QTA = 0;
                IDAnnata = Convert.ToInt32(((Label)gvr.FindControl("lblIDAnnata")).Text);
                QTA = Convert.ToInt32(((TextBox)gvr.FindControl("tbQTA")).Text);
                if (QTA > 0)
                {
                    cookieBalestra[IDAnnata.ToString()] = QTA.ToString();
                }
            }


        }
        catch
        {
        }
        foreach (CHIAVE IN COOKIEBALESTRA)
        {
            // RECUPERA IL VALORE 
        }
    }