WPF:获取TreeViewItem的组成控件 [英] WPF: Getting TreeViewItem's constituent controls

问题描述

如果构成控件位于TreeeraItem数据模板中，如何在代码中构成TreeViewItem?

how can I get the constituent controls making up the TreeViewItem in code if they are inside a hierarichicaldatatemplate?

<HierarchicalDataTemplate DataType="{x:Type local:Module}" ItemsSource="{Binding Children}">
    <StackPanel Orientation="Horizontal">
        <Image Width="16" Height="16" Margin="3,0" Source="Images\module.ico" />
        <local:RenamingNode Name="RenamableNode" Text="{Binding Name}" VstaObject="{Binding BindsDirectlyToSource=True}" OnRename="OnRenameOccured"  />
    </StackPanel>
</HierarchicalDataTemplate>

因此，以编程方式，当我得到一个以TreeViewItem为源的事件时，我希望能够获取local:RenamingNode，但无法获取TreeViewItem的后代.

So programatically when I get an event with a TreeViewItem as the source, I want to be able to get the local:RenamingNode, but I can't get the TreeViewItem's descendants.

谢谢

Ilya

推荐答案

这对我有用.毫无疑问，像往常一样，有更好的方法，并且毫无疑问，您将添加额外的检查，例如检查子代数和/或在循环中获取/检查子代的类型/名称等，但是基本技术可以正常工作虽然我有一个网格而不是一个StackPanel，但是在我的应用程序中做了.

This worked for me. Doubtless there is a better way, as always, and you will doubtless add extra checks such as checking the Child(ren) count and/or getting/checking type/name of children in a loop etc. but the basic technique works, well it did in my app although I have a Grid instead of a StackPanel.

private object FindContentTemplatePart(TreeViewItem treeViewItem) 
{ 
    if (treeViewItem != null) 
    { 
        var header = (ContentPresenter)treeViewItem.Template.FindName("PART_Header", treeViewItem);

        if (header != null) 
        { 
            StackPanel stackPanel = (StackPanel)VisualTreeHelper.GetChild(header,0);

            return stackPanel.Children[2];
        } 
    } 
    return null; 
} 

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