protected void Page_Load(object sender, EventArgs e)
 {
     if (!Page.IsPostBack)
     {
         Session["MyBook"] = new ListLivreViewModel();
     }
     LivreBinding();
 }
 private void AddPanier(double totalPrixVM)
 {
     if (Session["MyBook"] != null)
     {
         NotreLivres = (ListLivreViewModel)Session["MyBook"];
     }
     else
     {
         NotreLivres = new ListLivreViewModel(totalPrixVM);
     }
 }
 private void AddLivre()
 {
     if (Session["MyBook"] != null)
     {
         NotreLivres = (ListLivreViewModel)Session["MyBook"];
     }
     else
     {
         NotreLivres = new ListLivreViewModel();
     }
 }
 private void LivreBinding()
 {
     NotreLivres = new ListLivreViewModel();
     #region ListView
     gvBook.DataSource = NotreLivres.ListBookVM;
     gvBook.DataBind();
     #endregion
     //#region textbox
     //txbTotal.Text = NotreLivres.TotalPrixVM.ToString();
     //txbTotal.DataBind();
     //#endregion
 }