街道管理系统

执行后

窗体加载时，填充TreeView，点击某一层级时，将文本填充到右侧的textBox文本框中

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;
using System.Xml;

namespace Street
{
    public partial class FrmMain : Form
    {
        public FrmMain()
        {
            InitializeComponent();
        }

        private void FrmMain_Load(object sender, EventArgs e)
        {
            XmlDocument xml = new XmlDocument();
            xml.Load("Address.xml");
            XmlElement root = xml.DocumentElement;
            TreeNode tn = new TreeNode();
            tn.Text = root.Attributes["name"].InnerText;
            tvStreet.Nodes.Add(tn);
            TreeNode no = null;
            TreeNode chids = null;
            foreach (XmlNode item in root.ChildNodes)
            {
                no = new TreeNode(item.Attributes["name"].Value);
                tn.Nodes.Add(no);
                TreeNode chid = null;
                foreach (XmlNode node in item.ChildNodes)
                {
                    chid = new TreeNode(node.Attributes["name"].Value);
                    no.Nodes.Add(chid);
                    foreach (XmlNode items in node.ChildNodes)
                    {
                        chids = new TreeNode(items.InnerXml);
                        chid.Nodes.Add(chids);

                    }
                }
            }
        }

        private void tvStreet_AfterSelect(object sender, TreeViewEventArgs e)
        {
            if (this.tvStreet.SelectedNode.Level == 0)
            {
                textBox1.Text = tvStreet.SelectedNode.Text;
            }
            else if (this.tvStreet.SelectedNode.Level == 1)
            {
                textBox1.Text = tvStreet.SelectedNode.Parent.Text;
                textBox2.Text = tvStreet.SelectedNode.Text;
            }
            else if (this.tvStreet.SelectedNode.Level == 2)
            {
                textBox1.Text = tvStreet.SelectedNode.Parent.Parent.Text;
                textBox2.Text = tvStreet.SelectedNode.Parent.Text;
                textBox3.Text = tvStreet.SelectedNode.Text;
            }
            else if (this.tvStreet.SelectedNode.Level == 3)
            {
                textBox1.Text = tvStreet.SelectedNode.Parent.Parent.Parent.Text;
                textBox2.Text = tvStreet.SelectedNode.Parent.Parent.Text;
                textBox3.Text = tvStreet.SelectedNode.Parent.Text;
                textBox4.Text = tvStreet.SelectedNode.Text;
            }
        }
    }
}