//Get: Manage/Discounts/{Id} public ActionResult Discounts(string id) { ViewBag.Discounts = Korting.All(); ViewBag.Products = Product.All(); if (id != null) { ViewBag.Product = Product.Find(id); ViewBag.Discount = Korting.Find(id); } return(View("~/Views/Manage/Discounts.cshtml")); }