private void KayitGeriB_Click(object sender, EventArgs e)
        {
            Close();
            var x = new Giris();

            x.Visible = true;
        }
        private void AdminGeriB_Click(object sender, EventArgs e)
        {
            Close();
            var t = new Giris();

            t.Visible = true;
        }
        private void KayitBT_Click(object sender, EventArgs e)
        {
            con.Open();

            Int64         SelectedBolumId = (OgrBolumTB.SelectedItem as dynamic).Value;
            Int64         SelectedOdaId   = (OgrOdaNoTB.SelectedItem as dynamic).Value;
            OracleCommand comkayit        = con.CreateCommand();


            comkayit.CommandText = ("INSERT INTO YOGRENCI (OGRAD, OGRSOYAD, OGRTC, OGRTELEFON, OGRDOGUM, OgrBolumId, OgrOdaId, OGRPASS, OGRVELIADSOYAD, OGRVELITELEFON, OgrVeliAdres)" +
                                    " VALUES (:OGRAD, :OGRSOYAD, :OGRTC, :OGRTELEFON, :OgrBolumId, :OGRDOGUM, :OgrOdaId,:OGRPASS, :OGRVELIADSOYAD, :OGRVELITELEFON, :OgrVeliAdres) ");


            comkayit.Parameters.Add(new OracleParameter("OGRAD", OgrAdTB.Text));
            comkayit.Parameters.Add(new OracleParameter("OGRSOYAD", OgrSoyadTB.Text));
            comkayit.Parameters.Add(new OracleParameter("OGRTC", OgrTCTB.Text));
            comkayit.Parameters.Add(new OracleParameter("OGRTELEFON", OgrTelTB.Text));
            comkayit.Parameters.Add(new OracleParameter("OGRDOGUM", OgrDogumTB.Text));
            comkayit.Parameters.Add(new OracleParameter("OgrBolumId", SelectedBolumId));
            comkayit.Parameters.Add(new OracleParameter("OgrOdaId", SelectedOdaId));
            comkayit.Parameters.Add(new OracleParameter("OGRPASS", OgrPassTB.Text));
            comkayit.Parameters.Add(new OracleParameter("OGRVELIADSOYAD", OgrVeliadTB.Text));
            comkayit.Parameters.Add(new OracleParameter("OGRVELITELEFON", OgrVeliTelTB.Text));
            comkayit.Parameters.Add(new OracleParameter("OgrVeliAdres", OgrAdresTB.Text));


            try
            {
                comkayit.ExecuteNonQuery();
                odaDoldur();
            }

            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }

            MessageBox.Show("Kayit basarili!");


            con.Close();
            Close();

            var b = new Giris();

            b.Visible = true;
        }