<?xml version="1.0" encoding="gb2312"?>
<root name="石牌街道">
    <juwei name="瑞华居委">
        <jianzhu smid="6" name="瑞华花园1栋">
            <fjname>101室</fjname>
            <fjname>102室</fjname>                            
        </jianzhu>
        <jianzhu smid="7" name="瑞华花园2栋">
            <fjname>101室</fjname>
            <fjname>102室</fjname>                            
        </jianzhu>
    </juwei>
    <juwei name="金帝居委">
        <jianzhu smid="4" name="金帝花园1栋">        
                <fjname>101室</fjname>
                <fjname>102室</fjname>        
        </jianzhu>
    </juwei>
    <juwei name="朝阳居委">
        <jianzhu smid="5" name="朝阳花园1栋">        
                <fjname>101室</fjname>
                <fjname>102室</fjname>
        </jianzhu>
    </juwei>
</root>

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

namespace Street_Management_System
{
    public class Street
    {
        public Street()
        {
        }

        public Street(string streets, string jwh, string dong, string s)
        {
            Streets = streets;
            Jwh = jwh;
            Dong = dong;
            S = s;
        }

        //街道
        public string Streets { get; set; }
       //居委会
        public string Jwh { get; set; }
        //楼房（栋）
        public string Dong { get; set; }

        //厅室
        public string S { get; set; }
    }
}

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

namespace Street_Management_System
{
    public class ReadXML
    {
        public ReadXML()
        {
            dic = new Dictionary<string, Street>();
        }

        public ReadXML(Dictionary<string, Street> dic)
        {
            this.dic = dic;
        }

        //存储xml文件的双列集合
        public Dictionary<string, Street> dic { get; set; }

        public Dictionary<string, Street> Read()
        {
            XmlDocument doc = new XmlDocument();
            /*
             * 读取xml文件
             * */
            doc.Load("Address.xml");
            //获取xml文件的根节点
            XmlNode xml = doc.DocumentElement;
            
            /*
             * 解析xml文件的各个接点并存入集合
             * */
            foreach (XmlNode item in xml.ChildNodes)
            {
                string street = item.ParentNode.Attributes["name"].InnerText;
                string jwh = item.Attributes["name"].InnerText;
                string dong = null;
                string s = null;
                foreach (XmlNode items in item.ChildNodes)
                {
                    dong = items.Attributes["name"].InnerText;
                    foreach (XmlNode itemss in items.ChildNodes)
                    {
                        s = itemss.InnerText;
                        Street aaa = new Street(street,jwh,dong,s);
                        dic.Add(dong+"|"+s,aaa);
                    }
                }
            }
            return dic;
        }
    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Street_Management_System
{
    public partial class 街道管理系统 : Form
    {
        public 街道管理系统()
        {
            InitializeComponent();
        }
        public Dictionary<string, Street> dic = new Dictionary<string, Street>();

        private void Form1_Load(object sender, EventArgs e)
        {
            AddTree();
        }


        /*
         * 接收ReadXML类中存储xml信息的集合
         * */
        public void AddTree()
        {
            ReadXML xml = new ReadXML();
            dic = xml.Read();
            string street = null;
            string jwh = null;
            string dong = null;
            TreeNode sTree = null;
            TreeNode streetTree = null;
            TreeNode jwhTree = null;
            TreeNode dongTree = null;
            /*
             *拆解集合中的数据并赋值到TreeView控件的相应接点中 
             * */
            foreach (KeyValuePair<string, Street> item in dic)
            {
                if (street != item.Value.Streets)
                {
                    streetTree = new TreeNode();
                    streetTree.Text = item.Value.Streets;
                    tvStreet.Nodes.Add(streetTree);
                }
                if (jwh != item.Value.Jwh)
                {
                    jwhTree = new TreeNode();
                    jwhTree.Text = item.Value.Jwh;
                    streetTree.Nodes.Add(jwhTree);
                }
                if (dong != item.Value.Dong)
                {
                    dongTree = new TreeNode();
                    dongTree.Text = item.Value.Dong;
                    jwhTree.Nodes.Add(dongTree);
                }

                sTree = new TreeNode();
                sTree.Text = item.Value.S;
                sTree.Tag = item.Key;
                dongTree.Nodes.Add(sTree);

                street = item.Value.Streets;
                jwh = item.Value.Jwh;
                dong = item.Value.Dong;
            }
        }

        private void tvStreet_AfterSelect(object sender, TreeViewEventArgs e)
        {
            /*
             * 当点击节点时，读取选中节点的信息赋值到文本框中显示
             * */
            if (tvStreet.SelectedNode.Level == 0)
            {
                textBox1.Text = tvStreet.SelectedNode.Text;
            }
            else if (tvStreet.SelectedNode.Level == 1)
            {
                textBox2.Text = tvStreet.SelectedNode.Text;

            }
            else if (tvStreet.SelectedNode.Level == 2)
            {
                textBox3.Text = tvStreet.SelectedNode.Text;

            }
            else if (tvStreet.SelectedNode.Level == 3)
            {
                textBox4.Text = tvStreet.SelectedNode.Text;

            }
        }
    }
}