public ActionResult Create(UserItem useritem)
        {
            if (ModelState.IsValid)
            {
                context.UserItems.Add(useritem);
                context.SaveChanges();
                return RedirectToAction("Index");
            }

            ViewBag.PossibleItemValues = context.ItemValues;
            return View(useritem);
        }
 public ActionResult Edit(UserItem useritem)
 {
     if (ModelState.IsValid)
     {
         context.Entry(useritem).State = EntityState.Modified;
         context.SaveChanges();
         return RedirectToAction("Index");
     }
     ViewBag.PossibleItemValues = context.ItemValues;
     return View(useritem);
 }