ItemsControl.xaml

<UserControl x:Class=ShowList
 xmlns:my='clr-namespace:MyStuff'>
 <ItemsCollection x:Name='listShow'>
  <ItemsCollection.ItemTemplate>
   <DataTemplate>
    <Grid>
    ...The rest of your display here, using the binding to generate view.
    <label Content="{Binding Converter={x:Static my:ShowList.ElementIndex}}"/>
   </Grid>
  </DataTemplate>
</UserControl>