WPF ListBoxItem selection problem

Question

I have a listbox where the items contain checkboxes:

Answer 1

You can also bind the IsChecked property of the CheckBox and IsSelected property of the ListBoxItem:

<ListBox>
    <ListBox.ItemTemplate>
        <DataTemplate>
            <CheckBox Content="{Binding DisplayText}" IsChecked="{Binding Path=IsSelected, RelativeSource={RelativeSource AncestorType={x:Type ListBoxItem}}}"/>
        </DataTemplate>
    </ListBox.ItemTemplate>
</ListBox>

Answer 2

To begin with, put the content outside the CheckBox:

<StackPanel Orientation="Horizontal">
    <CheckBox IsChecked="{Binding IsChecked}"/>
    <TextBlock Text="{Binding DisplayText}"/>
</StackPanel>

After that, you will need to ensure that pressing space on a ListBoxItem results in the CheckBox being checked. There are a number of ways of doing this, including a simple event handler on the ListBoxItem. Or you could specify a handler for UIElement.KeyUp or whatever in your DataTemplate:

<CheckBox IsChecked="{Binding IsChecked}" UIElement.KeyUp="..."/>

Answer 3

In your use case it would be way simpler to use a ItemsControl instead of a list box. A ItemsControl is similar to a Listbox except that it doesn't contain the automatic selection behaviour. Which means that using it to host a list of what are essentially checkboxes is very simple and you don't have to workaround the ListBox's selection behaviour.

Simply switching to ItemsControl will give you exactly what you need:

<ItemsControl Style="{StaticResource CheckBoxListStyle}" Name="EditListBox">
    <ItemsControl .ItemTemplate>
        <DataTemplate>
            <CheckBox Click="Checkbox_Click" IsChecked="{Binding Path=IsChecked, Mode=TwoWay}" Content="{Binding Path=DisplayText}" />
        </DataTemplate>
    </ItemsControl.ItemTemplate>
</ItemsControl>

You can click on text to check checkboxes (default behavior) and you can use the keyboard too without having to wire up any event handlers.