WPF ListBoxItem double-click?

It is possible to bind commands with parameters to ListBoxItems without using code-behind or attached behaviors, simply by using InputBindings with a MouseBinding, as shown before in this answer.

Example ListBox with MouseBinding for LeftDoubleClick:

<ListBox ItemsSource="{Binding MyDataSource}">
    <ListBox.ItemTemplate>
        <DataTemplate>
            <TextBlock Text="{Binding MySourceItemName}">
                <TextBlock.InputBindings>
                    <MouseBinding MouseAction="LeftDoubleClick"
                                  Command="{Binding DataContext.MyCommand, RelativeSource={RelativeSource AncestorType={x:Type ListBox}}}"
                                  CommandParameter="{Binding MySourceItemId}" />
                </TextBlock.InputBindings>
            </TextBlock>
        </DataTemplate> 
    </ListBox.ItemTemplate>
</ListBox>

If the command is defined in the same DataContext as the ItemsSource of the ListBox, it can be bound by using the RelativeSource binding as included in the example.