c# - 如何在 TreeView 中调用 SelectedItem 的子项以检索数据值

Question

在我的程序中，我有一个TreeView由 ViewModel/Model 实现和管理的。

这是用于将每个节点添加到 Tree 的方法，它位于TreeViewViewModel 中：

private TreeModel createNewNode(string value1, string value2, string value3 )
{
    return new BlockingTreeModel()
    {
        DisplayName = "Example Node",
        Children =
        {
            new TreeModel() { DisplayName = "Child 1: " + value1},
            new TreeModel() { DisplayName = "Child 2: " + value2 },
            new TreeModel() { DisplayName = "Child 3: " + value3 }
        }
    };
}

我想DisplayName使用SelectedItem. 我将如何调用该值？例如，将 a 的内容设置为textBox孩子的DisplayNames...

现在我已经做到了：

TextBox = Tree.SelectedItem.Children //This is where I am guessing that I need to use a method like .Count()

谢谢你。

更新 1

树视图的 XAML：

<TreeView ItemsSource="{Binding BlockingTree.BlockTree}" SelectedItemChanged="Tree_SelectedItemChanged" PreviewMouseRightButtonDown="Tree_PreviewMouseRightButtonDown" ... >

Answer 1

尝试这个：

<TreeView ItemsSource="{Binding BlockingTree.BlockTree}" DisplayMemberPath="DisplayName" SelectedItemChanged="Tree_SelectedItemChanged" PreviewMouseRightButtonDown="Tree_PreviewMouseRightButtonDown" x:Name="TreeViewBox" ... >


<TextBox Text="{Binding SelectedItem.DisplayName, ElementName=TreeViewBox}" />