Filtering an ObservableCollection?

Question

When I bind a ListBox directly to an ObservableCollection I get the real-time updates displayed in my ListBox, but as soon as I add other LINQ methods in the mix my ListBox

Answer 1

You should use the ICollectionView.Filter property:

ICollectionView view = CollectionViewSource.GetDefaultView(Words);
view.Filter = WordFilter;

...


bool WordFilter(object o)
{
    string w = (string)o;
    return w.Contains(":")
}