C#遍历文件夹（包括子目录）下的所有文件

 1 using System;
 2 using System.Collections.Generic;
 3 using System.ComponentModel;
 4 using System.Data;
 5 using System.Drawing;
 6 using System.Linq;
 7 using System.Text;
 8 using System.Windows.Forms;
 9 using System.IO;
10 
11 namespace WindowsFormsApplication2
12 {
13     public partial class Form1 : Form
14     {
15         public Form1()
16         {
17             InitializeComponent();
18         }
19 
20         public string foldPath = "";
21 
22        
23         public static void iterDir(FileSystemInfo[] fsInfo)
24         {
25             foreach(FileSystemInfo fsi in fsInfo)
26             {
27                 if (fsi.Extension.Length <= 0)
28                 {
29                     FileSystemInfo[] ff = (new DirectoryInfo(fsi.FullName)).GetFileSystemInfos();
30                     iterDir(ff);
31                 }
32                 else
33                 {
34                     FileStream fs = new FileStream("E:\\bb.txt",FileMode.Append);
35                     StreamWriter sw = new StreamWriter(fs);
36                     sw.WriteLine(fsi.FullName);
37                     sw.Close();
38                 }
39 
40             }
41         }
42 
43       
44 
45         private void btnChoice_Click(object sender, EventArgs e)
46         {
47             FolderBrowserDialog fbd = new FolderBrowserDialog();
48             fbd.Description = "请选择文件夹";
49 
50             if (fbd.ShowDialog() == DialogResult.OK)
51             {
52                 foldPath = fbd.SelectedPath;
53                 MessageBox.Show("您选择的文件夹是："+ foldPath, "选择文件夹提示");
54             }
55 
56         }
57 
58         private void btnIterator_Click(object sender, EventArgs e)
59         {
60             DialogResult result;
61 
62             DirectoryInfo dirInfo = new DirectoryInfo(foldPath);
63             FileSystemInfo[] fsies = dirInfo.GetFileSystemInfos();
64 
65             iterDir(fsies);
66             
67             result = MessageBox.Show("文件夹"+ foldPath+"已经遍历完毕，结果保存在E:\\bb.txt，点击确定打开"," 结果提示",MessageBoxButtons.OKCancel);
68 
69             if (result == DialogResult.OK)
70             {
71                 System.Diagnostics.Process.Start(@"E:\bb.txt");
72             }
73 
74 
75         }
76     }
77 }