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Editorial Team
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Asked: 2026-05-25T18:57:18+00:00

I have a WPF ListBox whose items are TextBlocks. When I click on the

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I have a WPF ListBox whose items are TextBlocks. When I click on the text the SelectionChanged handler is called as expected. However, if I click inside the item, but not directly over the text the handler is not called. This is more apparent when the text items are of widely varying lengths. If I have two items:

foo
exclamation

The “foo” item has a lot of space to the right which doesn’t respond to the click

<DataTemplate x:Key="NameTemplate">
  <TextBlock Text="{Binding Name}"/>
</DataTemplate>

…

<ListBox SelectionChanged="ListItemSelected" ItemTemplate="{StaticResource NameTemplate}"/>
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1 Answer

  1. Editorial Team

    I found that the following works, but it seems rather verbose… 

    <ListBox SelectionChanged="ListItemSelected" ItemTemplate="{StaticResource NameTemplate}">
  <ListBox.ItemContainerStyle>
    <Style TargetType="ListBoxItem" BasedOn="{StaticResource {x:Type ListBoxItem}}">
       <Setter Property="HorizontalContentAlignment" Value="Stretch" />
    </Style>
  </ListBox.ItemContainerStyle>
</ListBox>

    Any ideas on how to do this more concisely? Or a way to put this in the ItemTemplate? I couldn’t find a way to do the same in the template.

    The orig without that was just:

    <ListBox SelectionChanged="ListItemSelected" ItemTemplate="{StaticResource NameTemplate}"/>
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