如何通過TextBlock找到silverlight TreeViewItem？

Question

我想單擊鼠標右鍵選擇TreeViewItem。還有就是我的XAML：

<TreeView x:Name="treeView" ItemsSource ="{Binding DisplayedDocuments}" 
        SelectedItemChanged="TreeView_SelectedItemChanged" IsEnabled="True" 
        MouseRightButtonDown="treeView_MouseRightButtonDown"> 
     <sdk:TreeView.ItemTemplate> 
     <sdk:HierarchicalDataTemplate ItemsSource="{Binding Path=DisplayedSubItems}"> 
      <StackPanel Orientation="Horizontal"> 
       <Image Source="{Binding Converter={StaticResource docImageConverter}}"/> 
       <TextBlock Width="5"></TextBlock> 
       <TextBlock Text="{Binding Caption}" 
          MouseRightButtonDown="TextBlock_MouseRightButtonDown"/> 
      </StackPanel> 
     </sdk:HierarchicalDataTemplate> 
     </sdk:TreeView.ItemTemplate> 
</TreeView> 

當我點擊樹型視圖有時TextBlock.MouseRightButtonDown引起的，而不是treeView.MouseRightButtonDown。所以，我想通過TextBlock_MouseRightButtonDown中的TextBlock來獲取treeViewItem。我嘗試過這樣：

TextBlock docCaption = e.OriginalSource as TextBlock; 
    StackPanel stackPanel = docCaption.Parent as StackPanel; 

但是，stackPanel.Parent爲null。

我試圖通過名字來找到控制：

TreeViewItem treeViewItem = (TreeViewItem)treeView.FindName(docCaption.Text); 

但它返回null。

Answer 1

使用VisualTreeHelper獲取父：http://blogs.msdn.com/b/kmahone/archive/2009/03/29/visualtreehelper.aspx http://miguelmadero.blogspot.com.au/2008/07/use-visualtreehelper-to-navigate.html