private void Btn_yeniKayit_Click(object sender, EventArgs e)
        {
            string hata = "";

            BusinessLogicLayer.BLL bLL = new BusinessLogicLayer.BLL();
            int ReturnValue            = bLL.SatisKaydiEkle(Convert.ToInt32(numUpD_y_ULC.Value), Convert.ToInt32(combo_y_isim.SelectedValue), combo_y_isim.Text, Convert.ToInt32(numUpD_y_kamera.Value), Convert.ToInt32(numUpD_y_nvr.Value), Convert.ToInt32(numUpD_y_videoDuvar.Value), Convert.ToInt32(numUpD_y_isistasyonu.Value), Convert.ToInt32(numUpD_y_klavye.Value), dateTime_y_tarih.Value, txt_y_lisanskodu.Text, txt_y_donanimid.Text, txt_y_aciklama.Text, out hata);

            if (ReturnValue > 0)
            {
                MessageBox.Show("Yeni kayıt eklendi", "Bilgilendirme", MessageBoxButtons.OK, MessageBoxIcon.Information);
                yenile();
            }
            else
            {
                MessageBox.Show("Hatali giriş", hata, MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }
        }