public AddPurchaseView(string animationName, TabHelper hlp)
        {
            InitializeComponent();
            Thread.CurrentThread.CurrentCulture = new CultureInfo("fr-FR");

            Thread.CurrentThread.CurrentUICulture = new CultureInfo("fr-FR");
            _tabHlp = hlp;
            _productsSelSelected = new List<ProduitsSel>();
            //produit = new Products();
            _productManger = new ProductManger();

            _tvaClient = new TvaClient();
            TvaComboBox.ItemsSource = _tvaClient.GetTvaValues();

            _suppliersManager = new SuppliersManager();
            _productManger.ResetUnitsOnOrder();
            _productSelected = new List<Product>();
            if (string.IsNullOrEmpty(animationName)) return;
            var animation = (Storyboard) Application.Current.Resources[animationName];
            LayoutRoot.BeginStoryboard(animation);
        }