C#遍历目录下的文件和子目录

 1         //打开目录
 2         private void BtnClickOpenDirPics(object sender, EventArgs e)
 3         {
 4             FolderBrowserDialog DirPics = new FolderBrowserDialog();
 5             DirPics.SelectedPath = "D:\\";
 6 
 7             if (DirPics.ShowDialog() == DialogResult.OK)
 8             {
 9                 string FolderPathName = DirPics.SelectedPath;
10                 DirectoryInfo DiFolder = new DirectoryInfo(FolderPathName);
11                 ArrayList Lfiles = new ArrayList();
12                 GetAll(DiFolder, ref Lfiles);
14             }
15         }
16 
17         private void GetAll(DirectoryInfo dir, ref ArrayList FileList)//搜索文件夹中的文件
18         {
19             FileInfo[] allFile = dir.GetFiles();
20             foreach (FileInfo fi in allFile)
21             {
22                 FileList.Add(fi.FullName);
23             }
24 
25             DirectoryInfo[] allDir = dir.GetDirectories();
26             foreach (DirectoryInfo d in allDir)
27             {
28                 GetAll(d, ref FileList);
29             }
30         }