#986 – Filtering a ListBox Using a CollectionViewSource

When populating a ListBox from a CollectionViewSource, you can also filter the data.  Below is an example of a ListBox that is bound to a CollectionViewSource.

<Window.Resources>

    <CollectionViewSource x:Key="cvsActors" Source="{Binding ActorList}" >

        <CollectionViewSource.SortDescriptions>

            <scm:SortDescription PropertyName="LastName" />

        </CollectionViewSource.SortDescriptions>

    </CollectionViewSource>

</Window.Resources>

 

<StackPanel>

    <ListBox Name="lbActors" Margin="15" Width="200" Height="200"

             ItemsSource="{Binding Source={StaticResource cvsActors}}"/>

    <CheckBox Content="Only Joans" IsChecked="{Binding OnlyJoans}"

              Margin="15"/>

</StackPanel>

In code, we add a handler for the Filter event of the CollectionViewSource.  The handler is called for each item in the list.

Read more: 2,000 Things You Should Know About WPF