private void ModClick(object sender, RoutedEventArgs e)
{
if (StudentListBox.SelectedItem == null)
{
return;
}
// problémás verzió:
//Student stud = StudentListBox.SelectedItem as Student;
//StudentBindingWindow window = new StudentBindingWindow(stud);
//if (window.ShowDialog() == true) MessageBox.Show("OK, modified");
//else MessageBox.Show("BUG: cannot cancel a BINDING!!!"); // TODO: edit a copy => Prototype design pattern!
// javított verzió
Student stud = StudentListBox.SelectedItem as Student;
Student clone = new Student();
clone.CopyFrom(stud);
StudentBindingWindow window = new StudentBindingWindow(clone); // !! clone = nem baj ha elveszik
if (window.ShowDialog() == true)
{
MessageBox.Show("OK, modified");
stud.CopyFrom(clone); // visszamásolni
}
StudentListBox.Items.Refresh(); // később observable collection...
}
private void AddClick(object sender, RoutedEventArgs e)
{
StudentBindingWindow sbw = new StudentBindingWindow();
#region datacontext állítás (A) verzió:
//Student s = new Student();
//sbw.DataContext = s;
//if (sbw.ShowDialog() == true) // modális megjelenítés
// StudentListBox.Items.Add(s);
#endregion
#region datacontext állítás (B) verzió:
if (sbw.ShowDialog() == true) // modális megjelenítés
{
StudentListBox.Items.Add(sbw.Student);
}
#endregion
}
