WPF：防止ContextMenu出現在子TreeViewItems

Question

我想讓設計成爲一個WPF TreeView，其中ContextMenu在特定節點上激活。

在我的例子中，儘管我盡了最大的努力，但當孩子點擊FooNode的時候，我無法讓BarNode的ContextMenu出現。

C＃：

public abstract class NodeBase 
{ 
    public NodeBase[] ChildNodes { get; set; } 
} 

public class FooNode : NodeBase 
{ 

} 

public class BarNode : NodeBase 
{ 
} 

public class ExampleModel : BaseModel 
{ 
    private NodeBase[] _nodes; 

    public NodeBase[] Nodes 
    { 
     get 
     { 
      _nodes = new NodeBase[] 
       { 
        new FooNode(), 
        new BarNode() 
         { 
          ChildNodes = new NodeBase[] 
          { 
           new FooNode(), 
           new FooNode() 
          } 
         } 
       }; 
      return _nodes; 
     } 
    } 

    public ExampleModel() 
    { 

    } 
} 

public class TreeViewStyleSelector : StyleSelector 
{ 
    public Style FooNodeStyle { get; set; } 

    public Style BarNodeStyle { get; set; } 

    public override Style SelectStyle(object item, DependencyObject container) 
    { 
     var fooNode = item as FooNode; 
     if (fooNode != null) 
     { 
      return FooNodeStyle; 
     } 

     var barNode = item as BarNode; 
     if (barNode != null) 
     { 
      return BarNodeStyle; 
     } 

     return base.SelectStyle(item, container); 
    } 
} 

XAML

<Window 
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
     xmlns:Nodes="clr-namespace:UnderstandingWPFTreeView.Nodes" 
     xmlns:Models="clr-namespace:UnderstandingWPFTreeView.Models" 
     xmlns:Common="clr-namespace:UnderstandingWPFTreeView.Common" 
    x:Class="UnderstandingWPFTreeView.MainWindow" 
     Title="MainWindow" Height="350" Width="525"> 

    <Window.DataContext> 
     <Models:ExampleModel/> 
    </Window.DataContext> 

    <Window.Resources> 
     <ContextMenu x:Key="testContextMenu"> 
      <MenuItem Header="Test Context Item"></MenuItem> 
      <MenuItem Header="Test Context Item"></MenuItem> 
     </ContextMenu> 

     <Style TargetType="{x:Type TreeViewItem}" x:Key="FooNodeStyle"> 
     </Style> 

     <Style TargetType="{x:Type TreeViewItem}" x:Key="BarNodeStyle"> 
      <Setter Property="ContextMenu" Value="{StaticResource testContextMenu}" /> 
     </Style> 

     <Common:TreeViewStyleSelector 
       x:Key="treeViewStyleSelector" 
       FooNodeStyle="{StaticResource ResourceKey=FooNodeStyle}" 
       BarNodeStyle="{StaticResource ResourceKey=BarNodeStyle}" /> 

    </Window.Resources> 

    <StackPanel HorizontalAlignment="Left" Height="320" VerticalAlignment="Top" Width="517"> 
     <TreeView Height="100"> 
      <TreeView.Resources> 
       <HierarchicalDataTemplate DataType="{x:Type Nodes:BarNode}" ItemsSource="{Binding Path=ChildNodes}"> 
        <TextBlock Text="Bar" /> 
       </HierarchicalDataTemplate> 

       <HierarchicalDataTemplate DataType="{x:Type Nodes:FooNode}" ItemsSource="{Binding Path=ChildNodes}"> 
        <TextBlock Text="Foo" /> 
       </HierarchicalDataTemplate> 
      </TreeView.Resources> 

      <TreeViewItem Header="Testing" ItemsSource="{Binding Nodes}" ItemContainerStyleSelector="{StaticResource ResourceKey=treeViewStyleSelector}"/> 
     </TreeView> 
    </StackPanel> 

</Window> 

Answer 1

我問MSDN論壇的同樣的問題，得到的回答是，我可以爲工作確認。

http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/7dd183bc-d616-4ec4-8b2a-0b438c9a115c

放置在TextBlock中的文本菜單的對象給出相同的視覺外觀，減去傳遞文本菜單向下樹節點的鏈的效果。

<HierarchicalDataTemplate DataType="{x:Type local:BarNode}" ItemsSource="{Binding Path=ChildNodes}"> 
    <TextBlock Text="Bar" ContextMenu="{StaticResource testContextMenu}" /> 
</HierarchicalDataTemplate>