treeView和递归的简单运用

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using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.IO;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Forms;namespace treeview{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }        private void Form1_Load(object sender, EventArgs e)        {            string path = @"F:\demo";            LoadDirectoryAndFile(treeView1.Nodes,path);        }        private void LoadDirectoryAndFile(TreeNodeCollection tnc, string path)        {            //获取文件夹           string[] dirs = Directory.GetDirectories(path);           for (int i = 0; i < dirs.Length; i++)           {              TreeNode tn = tnc.Add(Path.GetFileName(dirs[i]));              LoadDirectoryAndFile(tn.Nodes, dirs[i]);//递归遍历           }            //获取文件           string[] files = Directory.GetFiles(path,"*.txt"); //只加载.txt           for (int i = 0; i < files.Length; i++)           {              TreeNode tn1 = tnc.Add(Path.GetFileName(files[i]));               ////Tag:可以存任何东西，在这里存的是文本文件的路径，因为文件夹不需要显示在文本框中              tn1.Tag = files[i];           }        }        private void treeView1_NodeMouseDoubleClick(object sender, TreeNodeMouseClickEventArgs e)        {            if (treeView1.SelectedNode.Tag != null)            {                textBox1.Text = File.ReadAllText(treeView1.SelectedNode.Tag.ToString(), Encoding.Default);            }        }    }}
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