void Brans_SelectedIndexChanged(object sender, System.EventArgs e)
        {
            string comm = $@"SELECT isim from Hocalar WHERE Brans = '{Brans.SelectedItem.ToString()}'";
            Dictionary <string, List <string> > names = HelperFunctionss.Sqlreaderexecuter(comm);

            HelperFunctionss.Pickeradjuster(Hocalar, names, "isim");
        }
        void Brans_SelectedIndexChanged(object sender, EventArgs e)
        {
            string comm = $@"SELECT isim from Hocalar WHERE Brans = '{Brans.SelectedItem.ToString()}'";
            Dictionary <string, List <string> > names = HelperFunctionss.Sqlreaderexecuter(comm);

            HelperFunctionss.Pickeradjuster(Hocalar, names, "isim");
            Gun.SelectedIndex = -1;
            Gun.Items.Clear();
            Gun.IsEnabled  = false;
            Grid.IsVisible = false;
        }
 void Hocalar_SelectedIndexChanged(object sender, EventArgs e)
 {
     if (Hocalar.SelectedIndex != -1)
     {
         string hocaid = $"select Hoca_id from Hocalar where isim = '{Hocalar.SelectedItem.ToString()}'";
         hocaid = HelperFunctionss.SqlExecuter(hocaid, 1);
         string comm = $@"SELECT DersGünü from Dersler 
         WHERE DersAdi = '{Brans.SelectedItem.ToString()}' 
         and hoca_id = '{hocaid}' and enrolled != quota";
         Dictionary <string, List <string> > names = HelperFunctionss.Sqlreaderexecuter(comm);
         HelperFunctionss.Pickeradjuster(Gun, names, "DersGünü");
         Grid.IsVisible = false;
     }
 }