private void Button16_Click(object sender, EventArgs e)
 {
     Player.Play();
     dersprogrami.Hide();
     Ders_Secim_Paneli.Show();
     Combobox_clear(new ComboBox[] { Brans_Menu, Brans_Hocalar_Menu, Gunler_Menu }, false, true);
     Control_disable(new Control[] { Gunler_Menu, Brans_Hocalar_Menu });
 }
        private void Button15_Click(object sender, EventArgs e)
        {
            if (Settings.GeneralSettings == string.Empty)
            {
                return;
            }
            Player.Play();
            Ders_Secim_Paneli.Hide();
            Datagridviewformatter(dersprogrami, Ders_gunlerii, Ders_saatleri, Color.DarkGray);
            Person person  = JsonConvert.DeserializeObject <Person>(Settings.GeneralSettings);
            string dersler = $@"select Dersler.DersGünü,Dersler.DersAdi, Dersler.hoca_id[hocaid], 
            cast(Dersler.date2 as time(0))[time] from Dersler inner join DersKayit 
            on DersKayit.ders_id = Dersler.Ders_ID where derskayit.student_id = '{person.Id}' ";
            Dictionary <string, List <string> > mydict = Sqlreaderexecuter(dersler);

            FillDataGridView(dersprogrami, mydict, true);
            MessageBox.Show("Bırakmak İstediğiniz Dersin Üzerine Çift Tıklayınız");
        }