TreeView：如何以编程方式将新的Child节点添加到WPF C中的选定节点＃ [英] TreeView: How do I programmatically add a new Child node to a Selected Node in WPF C#

问题描述

我有一个树视图，我需要在选择另一个节点时添加新的子节点。我有一个按钮，我需要允许用户在按下该按钮时将新的子节点添加到选定的节点。我怎样才能做到这一点好人呢？ :)



我也有一个OnItemSelected方法：

I have a treeview to which I need to add new child nodes when another node is selected. I have a button and I need to allow the user to add a new child node to a selected node when that button is pressed. How do I get that done good folks? :)

I have a OnItemSelected method too:

private void TreeViewItem_OnItemSelected(object sender, RoutedEventArgs e)
{
           nameTxt.Text = e.Source.ToString();
}

推荐答案

请参阅：

https://msdn.microsoft.com/en-us/library/system.windows。 controls.treeviewitem％28v = vs.110％29.aspx [ ^ ]，

https://msdn.microsoft.com/en-us/library/system.windows.controls.itemscontrol。 items％28v = vs.110％29.aspx [ ^ ]，

https://msdn.microsoft.com/en-us/library/system .windows.controls.itemcollection％28v = vs.110％29.aspx [ ^ ]，

https://msdn.microsoft.com/en-us/library/ms589116（v = vs.110）的.aspx [ ^ ]。



现在，让我们按照这些帮助页面进行操作。从头开始创建WPF应用程序并将一些示例代码添加到主窗口。这是一个完整的文件：

Please see:
https://msdn.microsoft.com/en-us/library/system.windows.controls.treeviewitem%28v=vs.110%29.aspx[^],
https://msdn.microsoft.com/en-us/library/system.windows.controls.itemscontrol.items%28v=vs.110%29.aspx[^],
https://msdn.microsoft.com/en-us/library/system.windows.controls.itemcollection%28v=vs.110%29.aspx[^],
https://msdn.microsoft.com/en-us/library/ms589116(v=vs.110).aspx[^].

Now, let's follow these help pages. Create a WPF application from scratch and add some sample code to main window. This is a complete file:

using System.Windows;
using System.Windows.Controls;

namespace SampleApplication.Ui {

    public partial class MainWindow : Window {

        public MainWindow() {
            // InitializeComponent(); // not really needed,
            // because this sample is fully programmatical;
            // you don't even need XAML if you properly write
            // your entry-point method (Main)
            TreeView treeView = new TreeView();
            TreeViewItem top = new TreeViewItem();
            top.Header = "sample header";
            TreeViewItem child = new TreeViewItem();
            child.Header = "sample child";
            TreeViewItem grandchild = new TreeViewItem();
            grandchild.Header = "sample grandchild";
            treeView.Items.Add(top);
            top.Items.Add(child);
            child.Items.Add(grandchild);
            this.AddChild(treeView);
        } //MainWindow

    } //class MainWindow

} //namespace SampleApplication.Ui

但实际上，这不是很典型的用法。在大多数情况下，您需要学习数据绑定。例如，请参阅 http://www.wpf-tutorial.com/treeview -control / treeview-data-binding-multiple-templates [ ^ ]。



另请参阅此更高级的CodeProject文章：使用ViewModel模式简化WPF TreeView [ ^ ]。

-SA

In practice, however, this is not very typical usage. In most cases, you need to learn data binding. See, for example, http://www.wpf-tutorial.com/treeview-control/treeview-data-binding-multiple-templates[^].

See also this more advanced CodeProject article: Simplifying the WPF TreeView by Using the ViewModel Pattern[^].

—SA

这篇关于TreeView：如何以编程方式将新的Child节点添加到WPF C中的选定节点＃的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！