c# - 如何找到与 TreeViewItem 关联的底层元素

Question

我正在尝试为绑定(bind)到自定义元素的 TreeView 控件实现拖放:

<TreeView ItemsSource="{Binding FirstGeneration}">
  <TreeView.Resources>
     <HierarchicalDataTemplate DataType="{x:Type NavigationTreeElement}" 
                               ItemsSource="{Binding Children}">
       <StackPanel Orientation="Horizontal" Margin="1">
          <Image Source="open-16x16.png" />
          <TextBlock Text="{Binding Path=DisplayName}" />
       </StackPanel>
     </HierarchicalDataTemplate>
  </TreeView.Resources>
</TreeView>

使用基础类:

 public class NavigationElement
 {
     public string DisplayName { get; set; }
     public ObservableCollection<NavigationElement> Children { get; set; }
 }

我在将呈现的 TreeViewItem 与底层 NavigationElement 关联时遇到问题。如果我找到鼠标悬停的 TreeViewItem，如下所示:

    private static TreeViewItem GetNearestContainer(UIElement element)
    {
        // Walk up the element tree to the nearest tree view item.
        var container = element as TreeViewItem;
        while ((container == null) && (element != null))
        {
            element = VisualTreeHelper.GetParent(element) as UIElement;
            container = element as TreeViewItem;
        }
        return container;
    }

如何将该 TreeViewItem 与基础 NavigationElement 关联？

Answer 1

我认为它在 container.Header ，看起来很奇怪。