public ActionResult Spiele(int kategorie_id = 5)
        {
            List <Item> items;

            rep = new RepositoryItemDB();
            rep.Open();
            items = rep.GetItemsByCategory(kategorie_id);
            rep.Close();

            return(View(items));
        }
        public ActionResult Gartenausstattung(int kategorie_id = 3)
        {
            List <Item> items;

            rep = new RepositoryItemDB();
            rep.Open();
            items = rep.GetItemsByCategory(kategorie_id);
            rep.Close();

            return(View(items));
        }