private void btnuredistudenta_Click(object sender, RoutedEventArgs e)
        {
            UrediStudenta uredi = new UrediStudenta();

            uredi.Show();
            this.Close();
        }
 public UrediStudenta()
 {
     InitializeComponent();
     uredi1 = this;
     try
     {
         NapolniTabeloStudentov();
     }
     catch (Exception ex)
     {
         MessageBox.Show(ex.ToString());
     }
 }