public ActionResult Create(Doc doc)
        {
            if (ModelState.IsValid)
            {
                db.Docs.Add(doc);
                db.SaveChanges();
                return RedirectToAction("Index");
            }

            ViewBag.DocTypeId = new SelectList(db.DocTypes, "ID", "DocTypeDescription", doc.DocTypeId);
            return View(doc);
        }
 public ActionResult Edit(Doc doc)
 {
     if (ModelState.IsValid)
     {
         db.Entry(doc).State = EntityState.Modified;
         db.SaveChanges();
         return RedirectToAction("Index");
     }
     ViewBag.DocTypeId = new SelectList(db.DocTypes, "ID", "DocTypeDescription", doc.DocTypeId);
     return View(doc);
 }