public ActionResult DiscountUpdate(FormCollection form)
        {
            FormCollection f = form;

            if (form["updateBtn"] != null)
            {
                Korting korting = Korting.Find(form["id"]);
                korting.EindDatum          = Convert.ToDateTime(form["endDate"]);
                korting.Opmerking          = form["Description"];
                korting.Kortingspercentage = Convert.ToDouble(form["discountPercentage"]);
                korting.SaveOrUpdate();
            }
            else if (form["deleteBtn"] != null)
            {
                Korting korting = Korting.Find(form["id"]);
                Korting.RemoveKortingFromProducts(korting.Id.ToString());
                korting.Delete();
            }

            return(this.Discounts(""));
        }