如何从HierarchicalDataTemplate项目获取TreeViewItem? [英] How to get TreeViewItem from HierarchicalDataTemplate item?

问题描述

我有一个TreeView，它使用HierarchicalDataTemplate绑定其数据.

I have a TreeView which uses a HierarchicalDataTemplate to bind its data.

它看起来像这样:

<TreeView x:Name="mainTreeList" ItemsSource="{Binding MyCollection}>
  <TreeView.Resources>
    <HierarchicalDataTemplate 
     DataType="{x:Type local:MyTreeViewItemViewModel}" 
     ItemsSource="{Binding Children}">
      <!-- code code code -->
    </HierarchicalDataTemplate>
  </TreeView.Resources>
</TreeView>

现在，从说完主窗口的代码后面，我想获取当前选择的TreeViewItem.但是，如果我使用:

Now, from the code-behind of say the main window, I want to get the current selected TreeViewItem. However, if I use:

this.mainTreeList.SelectedItem;

selectedItem的类型为MyTreeViewItemViewModel.但是我想获取父"或绑定" TreeViewItem.我不会将其传递给我的TreeViewItemModel对象(甚至都不知道如何).

The selectedItem is of type MyTreeViewItemViewModel. But I want to get the 'parent' or 'bound' TreeViewItem. I do not pass that to my TreeViewItemModel object (wouldn't even know how).

我该怎么做?

推荐答案

来自 Bea Stollnitz 关于此的博客条目，请尝试

From Bea Stollnitz's blog entry about this, try

TreeViewItem item = (TreeViewItem)(mainTreeList
    .ItemContainerGenerator
    .ContainerFromIndex(mainTreeList.Items.CurrentPosition));

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