如何防止 TreeView 所选项目的子项继承其格式？

发布于 2024-12-12 15:54:11 字数 473 浏览 1 评论 0原文

我有一个树视图，其中我需要将仅选定节点的字体设置为粗体。如果该节点没有任何子节点，则它可以正常工作。但是，如果选择了具有子节点的节点，则子节点也会显示为粗体。

使用以下 XAML：

<TreeView.ItemContainerStyle>
 <Style TargetType="TreeViewItem">
  <Style.Triggers>
   <Trigger Property="IsSelected" Value="True">
    <Setter Property="FontWeight" Value="Bold"></Setter>
   </Trigger>
  </Style.Triggers>
 </Style>
</TreeView.ItemContainerStyle>

原文

I have a treeview in which i need to set the font of only selected node as bold.. It works fine if the node does not have any children. But in case a node having children is selected, the child nodes are also shown as bold..

Using following XAML:

<TreeView.ItemContainerStyle>
 <Style TargetType="TreeViewItem">
  <Style.Triggers>
   <Trigger Property="IsSelected" Value="True">
    <Setter Property="FontWeight" Value="Bold"></Setter>
   </Trigger>
  </Style.Triggers>
 </Style>
</TreeView.ItemContainerStyle>

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何时共饮酒 2024-12-19 15:54:12

编辑：您可以仅使用setter来防止继承：

 <Style TargetType="TreeViewItem">
  <!-- This has precedence over inheritance -->
  <Setter Property="FontWeight" Value="Normal"/>
  <Style.Triggers>
   <Trigger Property="IsSelected" Value="True">
    <Setter Property="FontWeight" Value="Bold"></Setter>
   </Trigger>
  </Style.Triggers>
 </Style>

或者您可以将此逻辑移至数据模板中，因此它不会向下继承，例如

<TreeView.ItemTemplate>
    <HierarchicalDataTemplate ItemsSource="{Binding Items}">
        <TextBlock Text="{Binding Name}">
            <TextBlock.Style>
                <Style TargetType="TextBlock">
                    <Style.Triggers>
                        <DataTrigger Binding="{Binding IsSelected, RelativeSource={RelativeSource AncestorType=TreeViewItem}}"
                                    Value="True">
                                    <Setter Property="FontWeight" Value="Bold"/>
                        </DataTrigger>
                    </Style.Triggers>
                </Style>
            </TextBlock.Style>
        </TextBlock>
    </HierarchicalDataTemplate>
</TreeView.ItemTemplate>

Edit: You can just use a setter to prevent the inheritance:

 <Style TargetType="TreeViewItem">
  <!-- This has precedence over inheritance -->
  <Setter Property="FontWeight" Value="Normal"/>
  <Style.Triggers>
   <Trigger Property="IsSelected" Value="True">
    <Setter Property="FontWeight" Value="Bold"></Setter>
   </Trigger>
  </Style.Triggers>
 </Style>

Or you could move this logic into the data-template, so it is not inherited down, e.g.

<TreeView.ItemTemplate>
    <HierarchicalDataTemplate ItemsSource="{Binding Items}">
        <TextBlock Text="{Binding Name}">
            <TextBlock.Style>
                <Style TargetType="TextBlock">
                    <Style.Triggers>
                        <DataTrigger Binding="{Binding IsSelected, RelativeSource={RelativeSource AncestorType=TreeViewItem}}"
                                    Value="True">
                                    <Setter Property="FontWeight" Value="Bold"/>
                        </DataTrigger>
                    </Style.Triggers>
                </Style>
            </TextBlock.Style>
        </TextBlock>
    </HierarchicalDataTemplate>
</TreeView.ItemTemplate>

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