public ActionResult Edit(Exemplar exemplar)
 {
     if (ModelState.IsValid)
     {
         exemplar.ConfigurarParaSalvar();
         db.Entry(exemplar).State = EntityState.Modified;
         db.SaveChanges();
         return(RedirectToAction("Index"));
     }
     ViewBag.editoraId = new SelectList(db.Fornecedor, "id", "nome");
     ViewBag.idiomaId  = new SelectList(db.Idioma, "id", "nome", exemplar.idiomaId);
     ViewBag.sessaoId  = new SelectList(db.Sessao, "id", "nome", exemplar.sessaoId);
     return(View(exemplar));
 }
        public ActionResult Create(Exemplar exemplar)
        {
            if (ModelState.IsValid)
            {
                if (VerificaJaExiste(exemplar))
                {
                    ViewBag.Erro = "Ja existe um registro com o ISBN informado!";
                    return(View(exemplar));
                }
                exemplar.ConfigurarParaSalvar();
                db.Item.Add(exemplar);
                db.SaveChanges();
                return(RedirectToAction("Index"));
            }

            ViewBag.editoraId = new SelectList(db.Fornecedor, "id", "nome");
            ViewBag.idiomaId  = new SelectList(db.Idioma, "id", "nome", exemplar.idiomaId);
            ViewBag.sessaoId  = new SelectList(db.Sessao, "id", "nome", exemplar.sessaoId);
            return(View(exemplar));
        }