1-) Genel Bilgiler

// ramazan haber152

protected override bool EntityInsert()

        {

            //if (!DurumKontrol()) return false;

            if (BagliTabloHataliGirisKontrol()) return false;

            var result = ((SatisBll)Bll).Insert(CurrentEntity, x => x.Kod == CurrentEntity.Kod) && BagliTabloKaydet();

            if (result && !KayitSonrasiFormuKapat)

                BagliTabloYukle();

            return result;

        }

kaynak : https://supportcenter.devexpress.com/ticket/details/t693490/dateedit-displaying-a-blank-control-when-value-is-null