public void retirer_click(Object sender, EventArgs e)
    {
        Button btn      = (Button)sender;
        String panierID = btn.ID.Replace("btnRetirer_", "");

        LibrairieLINQ.retirerArticlePanier(long.Parse(panierID));

        String url = "~/Pages/GestionPanierCommande.aspx?";

        Response.Redirect(url, true);
    }