In the visual state groups for the ListViewItem, there are different groups for Focus and Selection. If an item has focus it may not be selected. Pressing the arrow keys causes the next item to be selected which seems to fix this behavior.
The event you're probably looking for is the CollectionChanged event from your collection.
If you're using MVVM and the source is in the viewmodel, your ObservableCollection<Item> Items will have this event.
In your code behind, create an event handler to focus your listbox when the collection is changed.
{
ViewModel viewModel = new ViewModel();
DataContext = viewModel;
viewModel.Objects.CollectionChanged += Objects_CollectionChanged;
}
private void Objects_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
MyListBox.Focus(FocusState.Programmatic);
}
As for the other problem about multiple items having focus, my guess is that the ListViewItem container is being re-used and it has the focused visual state from the previous item which was focused and selected. The panel recycles item containers and stores
the private variables for reuse. I'm not saying visual states are private variables but I would guess it's something similar going on in this case too. If you're using a UserControl as your ListViewItem's Content then the constructor and Loaded event
will be called again so you can update your UI if necessary or change visual state. Do you want all items to be unfocused when the item is loaded? If you want the same object to be focused in the new collection that was focused before, then why remove the
object from the collection in the first place? If that's the case then update the collection using Add and Remove instead of Clear().
