public ActionResult KitapEkle(TBLKitap p)
        {
            //if (!ModelState.IsValid)
            //{
            //    return View("KitapEkle");
            //}

            var ktgr = dr.TBLKategori.Where(k => k.ID == p.TBLKategori.ID).FirstOrDefault();
            var yazr = dr.TBLYazar.Where(b => b.ID == p.TBLYazar.ID).FirstOrDefault();

            p.TBLKategori = ktgr;
            p.TBLYazar    = yazr;
            dr.TBLKitap.Add(p);
            dr.SaveChanges();
            return(RedirectToAction("Index"));
        }
        //[Authorize]
        public ActionResult KitapGuncelle(TBLKitap p)
        {
            var ktpguncl = dr.TBLKitap.Find(p.ID);

            ktpguncl.Ad       = p.Ad;
            ktpguncl.BasimYil = p.BasimYil;
            ktpguncl.Sayfa    = p.Sayfa;
            ktpguncl.YayinEvi = p.YayinEvi;
            ktpguncl.Durum    = true;
            var ktg = dr.TBLKategori.Where(k => k.ID == p.TBLKategori.ID).FirstOrDefault();
            var yzr = dr.TBLYazar.Where(y => y.ID == p.TBLYazar.ID).FirstOrDefault();

            ktpguncl.Kategori = ktg.ID;
            ktpguncl.Yazar    = yzr.ID;
            dr.SaveChanges();
            return(RedirectToAction("Index"));
        }