What's the best way to auto-scroll a list view to the last added item?

Question

I use a ListView to show a list of errors as they occur in my application. It behaves and looks exactly like the Error List in Visual Studio. I want to add auto-scrolling when the last error item is selected (like how Visual Studio's Log Window auto-scrolls when you place the caret at the end).

The list of errors is in an ObservableCollection, which is passed to the ListView.ItemsSource like this:

public ObservableCollection<ErrorListItem> Items;
... 
MyListView.ItemsSource = _Items;

I tried performing the auto-scroll in the _Items_CollectionChanged event handler, but because this is the event on the ItemsSource and not on the actual ListViewItems, it's a pain to figure out if the last item is selected, select the new row, etc. It's especially hard since it seems the ListViewItems are not created instantly. I managed to make it auto-scroll by delaying the call to set the last item selected like this:

void _Items_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
    // determine the last item to select from 'e'
    ...        

    _ItemPendingToBeScrolled = newItemToSelect;
    ListView.SelectedItem = newItemToSelect;


    Dispatcher.BeginInvoke(DispatcherPriority.Background, 
        (ThreadStart)delegate 
        { 
            if (_ItemPendingToBeScrolled != null)
            {
                ListView.ScrollIntoView(_ItemPendingToBeScrolled);
                ItemPendingToBeScrolled = null;
            } 
        })
}

But that's obviously not the right way to do it. Also, I want things to keep working if the list is filtered (not checking the last item in my source, but the last ListViewItem in the ListView).

Is there a way to listen to events when a ListViewItem gets added to the ListView following an addition to the bound collection? That would be the ideal event to capture in order to properly do my auto-scrolling. Or is there another technique I could use?

Answer 1

Duplicate problem.