How to find the child control's IsEnabled property in ListBoxItem for Trigger

Question

I am trying to disable the ListBox item depending on IsEnabled property of ListBoxItem's content. Like in this code the button 1 has IsEnabled=False but list box item is selectable. I want to disable the selection if contents IsEnabled property is false. how should trigger search for the item content and its IsEnabled property.

<Grid>
      <ListBox>
         <ListBox.ItemTemplate>
            <DataTemplate>
               <DataTemplate.Triggers>
                  <Trigger Property="IsEnabled"  Value="False">
                     <Setter Property="IsEnabled" Value="False"/>
                  </Trigger>
               </DataTemplate.Triggers>
            </DataTemplate>
         </ListBox.ItemTemplate>
         <ListBoxItem>
            <Button IsEnabled="False">1</Button>
         </ListBoxItem>
         <ListBoxItem>
            <Button>2</Button>
         </ListBoxItem>
         <ListBoxItem>
            <Button>3</Button>
         </ListBoxItem>         
      </ListBox>
</Grid>

Rachel Rachel · Accepted Answer · 2012-03-21T12:38:28

Why not just set IsEnabled on your ListBoxItem instead? It should disable the Button as well.

But that said, you could bind the Button.IsEnabled to ListBoxItem.IsEnabled using a RelativeSource binding, and set the IsEnabled property of the ListBoxItem, not the Button too

<Button IsEnabled="{Binding IsEnabled, 
    RelativeSource={RelativeSource AncestorType={x:Type ListBoxItem}}" />

If you're working with WPF, I'd highly recommend you look into the MVVM design pattern. It's well suited for WPF, and using it you would bind both the ListBoxItem.IsEnabled and Button.IsEnabled to the same property in the DataContext

How to find the child control's IsEnabled property in ListBoxItem for Trigger

1 Answers