Wpf 如何绑定到ControlTemplate中的SelectedItem属性?
考虑以下控件/模板Wpf 如何绑定到ControlTemplate中的SelectedItem属性?,wpf,data-binding,xaml,controltemplates,Wpf,Data Binding,Xaml,Controltemplates,考虑以下控件/模板 <my:ExpandingListBox Margin="0,2,0,0" x:Name="TagSearchListBox"> <my:ExpandingListBox.Template> <ControlTemplate TargetType="{x:Type my:ExpandingListBox}"> <Border Name="MyBorder" BorderThickness
<my:ExpandingListBox Margin="0,2,0,0" x:Name="TagSearchListBox">
<my:ExpandingListBox.Template>
<ControlTemplate TargetType="{x:Type my:ExpandingListBox}">
<Border Name="MyBorder" BorderThickness="2" BorderBrush="Black">
<Grid>
<TextBlock Name="MySelectionInfo" Background="White" Text="{TemplateBinding SelectedItem}"/>
<ScrollViewer Name="MyScrollViewer" HorizontalScrollBarVisibility="Hidden" Opacity="0" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" VerticalScrollBarVisibility="Hidden">
<ItemsPresenter Name="MyItemsPresenter"/>
</ScrollViewer>
</Grid>
</Border>
</ControlTemplate>
</my:ExpandingListBox.Template>
</my:ExpandingListBox>
基本上,当IsMouseOver为true时,会有额外的触发器/资源导致控件展开/折叠。当控件折叠时,我希望文本块“MySelectionInfo”显示所选项目的文本;当它展开时,我希望项目列表像正常一样显示。有没有办法获取所选项目的文本并在纯XAML的文本块中显示它
Setting Text=“{TemplateBinding SelectedItem}”运行,但不显示任何内容
编辑(解决方案):
<TextBlock Name="MySelectionInfo" Background="White">
<TextBlock.Text>
<Binding Path="SelectedItem.Name">
<Binding.RelativeSource>
<RelativeSource Mode="FindAncestor" AncestorType="{x:Type my:ExpandingListBox}"/>
</Binding.RelativeSource>
</Binding>
</TextBlock.Text>
</TextBlock>
“.Name”是我正在显示的项类型的已知属性。使用
相对资源进行绑定是否可行?也许是这样的:
<TextBlock Name="MySelectionInfo" Background="White"
Text="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type my:ExpandingListBox}}}" />
效果很好!解决方案见上文:)