async public Task <ActionResult> AddCable(CableRoll cable)
        {
            Db.CableRolls.Add(cable);
            await Db.SaveChangesAsync();

            return(RedirectToAction("AddCable"));
        }
        public ActionResult EditCable(CableRoll cableRoll)
        {
            var equip = Db.CableRolls.SingleOrDefault(e => e.Id == cableRoll.Id);

            equip.Brand     = cableRoll.Brand;
            equip.FeetPrice = cableRoll.FeetPrice;

            Db.SaveChanges();
            return(RedirectToAction("ViewAllCables"));
        }