How to get Items count from CollectionViewSource?

Question

I am using CollectionViewSource to filter the records displayed in a ListBox. The xaml follows.

Answer 1

The source collection and collectionview both implements IEnumerable so you can always iterate over them and count how many are in them. But I would only recommend doing this if you have no access to the actual collection you used as source.

private void SetSummary() 
{
    int initialCount = 0;
    foreach(var item in _viewSource.View.SourceCollection)
    {
        initialCount++;
    }

    int filteredCount = 0;
    foreach (var item in _viewSource.View)
    {
        filteredCount++;
    }
}