我需要改变的DataTemplate的项目，这取决于是该项目是否选择一个列表框（显示选中时不同/详细信息）。

I need to change the DataTemplate for items in a ListBox depending on whether the item is selected or not (displaying different/more information when selected).

我点击的问题（只能通过Tab键）列表框项目时没有得到最上面的元素的DataTemplate中（一StackPanel中）上的GotFocus / LostFocus事件，我的想法。

I don't get a GotFocus/LostFocus event on the top-most element in the DataTemplate (a StackPanel) when clicking the ListBox item in question (only through tabbing), and I'm out of ideas.

在此先感谢。

推荐答案

要做到这一点，最简单的方法是提供一个模板，为ItemContainerStyle，而不是在ItemTemplate中属性。在code下面我创建2个数据模板：一个是未选中，另一个是选择的状态。然后，我创建了ItemContainerStyle，这是实际的ListBoxItem中包含该项目的模板。我设置默认的ContentTemplate到未选中状态，然后提供一个触发器，换出模板时的IsSelected属性​​为true。 （注：我设置了code中的的ItemsSource属性后面的简单字符串列表）

The easiest way to do this is to supply a template for the "ItemContainerStyle" and NOT the "ItemTemplate" property. In the code below I create 2 data templates: one for the "unselected" and one for the "selected" states. I then create a template for the "ItemContainerStyle" which is the actual "ListBoxItem" that contains the item. I set the default "ContentTemplate" to the "Unselected" state, and then supply a trigger that swaps out the template when the "IsSelected" property is true. (Note: I am setting the "ItemsSource" property in the code behind to a list of strings for simplicity)

<Window.Resources>

<DataTemplate x:Key="ItemTemplate">
    <TextBlock Text="{Binding}" Foreground="Red" />
</DataTemplate>

<DataTemplate x:Key="SelectedTemplate">
    <TextBlock Text="{Binding}" Foreground="White" />
</DataTemplate>

<Style TargetType="{x:Type ListBoxItem}" x:Key="ContainerStyle">
    <Setter Property="ContentTemplate" Value="{StaticResource ItemTemplate}" />
    <Style.Triggers>
        <Trigger Property="IsSelected" Value="True">
            <Setter Property="ContentTemplate" Value="{StaticResource SelectedTemplate}" />
        </Trigger>
    </Style.Triggers>
</Style>

</Window.Resources>
<ListBox x:Name="lstItems" ItemContainerStyle="{StaticResource ContainerStyle}" />