数据绑定到 WPF 树视图中的 SelectedItem - Data binding to SelectedItem in a WPF Treeview

问题：

How can I retrieve the item that is selected in a WPF-treeview?如何检索在 WPF-treeview 中选择的项目？ I want to do this in XAML, because I want to bind it.我想在 XAML 中执行此操作，因为我想绑定它。

You might think that it is SelectedItem but apparently that does not exist is readonly and therefore unusable.您可能认为它是SelectedItem但显然它不存在是只读的，因此无法使用。

This is what I want to do:这就是我想要做的：

<TreeView ItemsSource="{Binding Path=Model.Clusters}" 
            ItemTemplate="{StaticResource ClusterTemplate}"
            SelectedItem="{Binding Path=Model.SelectedCluster}" />

I want to bind the SelectedItem to a property on my Model.我想将SelectedItem绑定到我的模型上的一个属性。

But this gives me the error:但这给了我错误：

'SelectedItem' property is read-only and cannot be set from markup. 'SelectedItem' 属性是只读的，不能从标记中设置。

Edit: Ok, this is the way that I solved this:编辑：好的，这是我解决这个问题的方法：

<TreeView
          ItemsSource="{Binding Path=Model.Clusters}" 
          ItemTemplate="{StaticResource HoofdCLusterTemplate}"
          SelectedItemChanged="TreeView_OnSelectedItemChanged" />

and in the codebehindfile of my xaml:在我的 xaml 的代码隐藏文件中：

private void TreeView_OnSelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)
{
    Model.SelectedCluster = (Cluster)e.NewValue;
}

---

解决方案：

参考一： https://stackoom.com/question/4C9g
参考二： Data binding to SelectedItem in a WPF Treeview