WPF中TreeView的使用

一、最简单的用法，使用TreeViewItem展开，如下：

效果：

二、获取xml文件中的数据进行展示，如下：
xml文件XMLFile1.xml代码：

窗体xaml代码：

运行效果：

三、使用数据绑定来来展示节点，这里在一个程序中，用三个函数举了三个例子，如下：
首先新建一个PropertyNodeItem类：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace WPFTreeview
{
    class PropertyNodeItem
    {
        public string Icon { get; set; }
        public string EditIcon { get; set; }
        public string DisplayName { get; set; }
        public string Name { get; set; }

        public List Children { get; set; }
        public PropertyNodeItem()
        {
            Children = new List();
        }
    }
}

主窗体xaml代码：

主窗体后台代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Xml;

namespace WPFTreeview
{
    /// 

    /// MainWindow.xaml 的交互逻辑
    /// 
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();

            //三个函数
            ShowTreeView1();
            //ShowTreeView2();
            //ShowTreeView3();
        }

        private const string FOLDER_ICON =  @"";//Icon路径
        private const string EDITABLE_ICON = @"";//Icon路径
        private const string TAG_ICON = @"";//Icon路径

        private void ShowTreeView1()
        {
            List itemList = new List();
            PropertyNodeItem node1 = new PropertyNodeItem()
            {
                DisplayName = "蔬菜",
                Name = "蔬菜可提供人体所必需的多种维生素和矿物质等营养物质！",
                Icon = FOLDER_ICON,
            };
            PropertyNodeItem node1tag1 = new PropertyNodeItem()
            {
                DisplayName = "青菜",
                Name = "青菜是十字花科，芸苔属一年或二年生草本植物！",
                Icon = TAG_ICON,
                EditIcon = EDITABLE_ICON
            };
            node1.Children.Add(node1tag1);
            PropertyNodeItem node1tag2 = new PropertyNodeItem()
            {
                DisplayName = "白菜",
                Name = "白菜是我国原产蔬菜，有悠久的栽培历史！",
                Icon = TAG_ICON,
                EditIcon = EDITABLE_ICON
            };
            node1.Children.Add(node1tag2);
            itemList.Add(node1);

            PropertyNodeItem node2 = new PropertyNodeItem()
            {
                DisplayName = "动物",
                Name = "动物是生物的一个种类。它们一般以有机物为食，能感觉，可运动，能够自主运动！",
                Icon = FOLDER_ICON,
            };
            PropertyNodeItem node2tag1 = new PropertyNodeItem()
            {
                DisplayName = "老虎",
                Name = "老虎是大型猫科动物；毛色浅黄或棕黄色，满身黑色横纹！",
                Icon = TAG_ICON,
                EditIcon = EDITABLE_ICON
            };
            node2.Children.Add(node2tag1);
            PropertyNodeItem node2tag2 = new PropertyNodeItem()
            {
                DisplayName = "大象",
                Name = "大象很早就成了人类的朋友，并能为人类提供帮助！",
                Icon = TAG_ICON,
                EditIcon = EDITABLE_ICON
            };
            node2.Children.Add(node2tag2);
            itemList.Add(node2);

            treeView.ItemsSource = itemList;
        }

        private void ShowTreeView2()
        {
            List itemList = new List();

            PropertyNodeItem leafOneNode = new PropertyNodeItem();
            leafOneNode.DisplayName = "小员工A";
            leafOneNode.Name = "这是小员工A";
            leafOneNode.Children = new List();

            PropertyNodeItem leafTwoNode = new PropertyNodeItem();
            leafTwoNode.DisplayName = "小员工B";
            leafTwoNode.Name = "这是小员工B";
            leafTwoNode.Children = new List();

            PropertyNodeItem leafThreeNode = new PropertyNodeItem();
            leafThreeNode.DisplayName = "小员工C";
            leafThreeNode.Name = "这是小员工C";
            leafThreeNode.Children = new List();

            PropertyNodeItem secondLevelNode = new PropertyNodeItem();
            secondLevelNode.DisplayName = "总经理";
            secondLevelNode.Name = "这是二级领导";
            secondLevelNode.Children = new List() { leafOneNode, leafTwoNode, leafThreeNode };

            PropertyNodeItem firstLevelNode = new PropertyNodeItem();
            firstLevelNode.DisplayName = "董事长";
            firstLevelNode.Name = "这是一级领导";
            firstLevelNode.Children = new List() { secondLevelNode };

            itemList.Add(firstLevelNode);
            treeView.ItemsSource = itemList;
        }

        private void ShowTreeView3()
        {
            List itemList = new List();

            XmlDocument doc = new XmlDocument();
            XmlReaderSettings settings = new XmlReaderSettings();
            settings.IgnoreComments = true;
            XmlReader reader = XmlReader.Create(@"XMLProducts.xml", settings);

            doc.Load(reader);
            XmlNode xn = doc.SelectSingleNode("Products");
            XmlNodeList xnl1 = xn.ChildNodes;

            foreach (XmlNode xn1 in xnl1)
            {
                //一级节点
                PropertyNodeItem firstLevelNode = new PropertyNodeItem();
                XmlElement xe1 = (XmlElement)xn1;
                firstLevelNode.Name = "我是一级节点";
                firstLevelNode.DisplayName = xe1.GetAttribute("Name").ToString();

                XmlNodeList xnl2 = xe1.ChildNodes;
                foreach (XmlNode xn2 in xnl2)
                {
                    XmlElement xe2 = (XmlElement)xn2;
                    XmlNodeList xnl3 = xe2.ChildNodes;

                    PropertyNodeItem secondLevelNode = new PropertyNodeItem();
                    secondLevelNode.Name = "我是二级节点";
                    secondLevelNode.DisplayName = xe2.GetAttribute("Name").ToString();

                    foreach (XmlNode xn3 in xnl3)
                    {
                        XmlElement xe3 = (XmlElement)xn3;
                        PropertyNodeItem leafOneNode = new PropertyNodeItem();
                        leafOneNode.DisplayName = xe3.GetAttribute("Name").ToString();
                        leafOneNode.Children = new List();

                        secondLevelNode.Children.Add(leafOneNode);
                    }
                    firstLevelNode.Children.Add(secondLevelNode);
                }
                itemList.Add(firstLevelNode);
            }
            reader.Close();
            treeView.ItemsSource = itemList;
        }
    }

}

三个例子运行效果分别是：

其中第三个例子是从XML文件中读取的数据，XMLProducts.xml文件代码如下：

XML文件属性如下：