如何在C#中递归列出目录和子目录中的所有文件?
请注意,在 .NET 4.0 中,有基于迭代器而非数组的文件函数(据说)内置:
foreach (string file in Directory.EnumerateFiles(path, "*.*", SearchOption.AllDirectories))
{
Console.WriteLine(file);
}
目前我会使用以下代码;内置的递归方法如果您无法访问单个子目录,则很容易崩溃...; Queue<string>
的使用避免了过多的调用堆栈递归,迭代器块避免了我们拥有一个巨大的数组。
static void Main() {
foreach (string file in GetFiles(SOME_PATH)) {
Console.WriteLine(file);
}
}
static IEnumerable<string> GetFiles(string path) {
Queue<string> queue = new Queue<string>();
queue.Enqueue(path);
while (queue.Count > 0) {
path = queue.Dequeue();
try {
foreach (string subDir in Directory.GetDirectories(path)) {
queue.Enqueue(subDir);
}
}
catch(Exception ex) {
Console.Error.WriteLine(ex);
}
string[] files = null;
try {
files = Directory.GetFiles(path);
}
catch (Exception ex) {
Console.Error.WriteLine(ex);
}
if (files != null) {
for(int i = 0 ; i < files.Length ; i++) {
yield return files[i];
}
}
}
}
*.*
是否包括没有文件扩展名的文件的人都可以了解:是的,它包括,我刚刚进行了测试。 - Tobias Knauss这篇文章包含了你需要的一切。但是与其搜索文件并比较名称,不如只打印出名称。
可以按以下方式进行修改:
static void DirSearch(string sDir)
{
try
{
foreach (string d in Directory.GetDirectories(sDir))
{
foreach (string f in Directory.GetFiles(d))
{
Console.WriteLine(f);
}
DirSearch(d);
}
}
catch (System.Exception excpt)
{
Console.WriteLine(excpt.Message);
}
}
由barlop添加
GONeale提到上面的代码没有列出当前目录中的文件,并建议将文件列表部分放在获取目录部分的外面。以下代码可以实现这个功能。它还包括一条Writeline语句可以取消注释,用于跟踪递归过程中的位置,有助于展示递归调用的方式。
DirSearch_ex3("c:\\aaa");
static void DirSearch_ex3(string sDir)
{
//Console.WriteLine("DirSearch..(" + sDir + ")");
try
{
Console.WriteLine(sDir);
foreach (string f in Directory.GetFiles(sDir))
{
Console.WriteLine(f);
}
foreach (string d in Directory.GetDirectories(sDir))
{
DirSearch_ex3(d);
}
}
catch (System.Exception excpt)
{
Console.WriteLine(excpt.Message);
}
}
Directory.GetFiles("C:\\", "*.*", SearchOption.AllDirectories)
Directory.GetDirectories(@"yourpath" , "*.*", SearchOption.AllDirectories)
- Soner from The Ottoman Empirestring[] files = Directory.GetFiles(@"your_path", "*.jpg", SearchOption.AllDirectories);
string[] files
吗? - Philipp Lenssenpublic static IEnumerable<string> GetAllFiles(string path,
Func<FileInfo, bool> checkFile = null)
{
string mask = Path.GetFileName(path);
if (string.IsNullOrEmpty(mask)) mask = "*.*";
path = Path.GetDirectoryName(path);
string[] files = Directory.GetFiles(path, mask, SearchOption.AllDirectories);
foreach (string file in files)
{
if (checkFile == null || checkFile(new FileInfo(file)))
yield return file;
}
}
使用方法如下:
var list = GetAllFiles(mask, (info) => Path.GetExtension(info.Name) == ".html").ToList();
IEnumerable<string> GetFilesFromDir(string dir) =>
Directory.EnumerateFiles(dir).Concat(
Directory.EnumerateDirectories(dir)
.SelectMany(subdir => GetFilesFromDir(subdir)));
以下是如何获取子目录的FileInfo文件:
var dir = new DirectoryInfo(rootPath);
FileInfo[] files = dir.GetFiles("*.*", SearchOption.AllDirectories);
static void DirSearch(string dir)
{
try
{
foreach (string f in Directory.GetFiles(dir))
Console.WriteLine(f);
foreach (string d in Directory.GetDirectories(dir))
{
Console.WriteLine(d);
DirSearch(d);
}
}
catch (System.Exception ex)
{
Console.WriteLine(ex.Message);
}
}
private int counter = 0;
private string[] MyDirectories = Directory.GetDirectories("C:\\");
private void ScanButton_Click(object sender, EventArgs e)
{
Thread MonitorSpeech = new Thread(() => ScanFiles());
MonitorSpeech.Start();
}
private void ScanFiles()
{
string CurrentDirectory = string.Empty;
while (counter < MyDirectories.Length)
{
try
{
GetDirectories();
CurrentDirectory = MyDirectories[counter++];
}
catch
{
if (!this.IsDisposed)
{
listBox1.Invoke((MethodInvoker)delegate { listBox1.Items.Add("Access Denied to : " + CurrentDirectory); });
}
}
}
}
private void GetDirectories()
{
foreach (string directory in MyDirectories)
{
GetFiles(directory);
}
}
private void GetFiles(string directory)
{
try
{
foreach (string file in Directory.GetFiles(directory, "*"))
{
listBox1.Invoke((MethodInvoker)delegate { listBox1.Items.Add(file); });
}
}
catch
{
listBox1.Invoke((MethodInvoker)delegate { listBox1.Items.Add("Access Denied to : " + directory); });
}
}
/// <summary>
/// Scans a folder and all of its subfolders recursively, and updates the List of files
/// </summary>
/// <param name="sFullPath">Full path of the folder</param>
/// <param name="files">The list, where the output is expected</param>
internal static void EnumerateFiles(string sFullPath, List<FileInfo> fileInfoList)
{
try
{
DirectoryInfo di = new DirectoryInfo(sFullPath);
FileInfo[] files = di.GetFiles();
foreach (FileInfo file in files)
fileInfoList.Add(file);
//Scan recursively
DirectoryInfo[] dirs = di.GetDirectories();
if (dirs == null || dirs.Length < 1)
return;
foreach (DirectoryInfo dir in dirs)
EnumerateFiles(dir.FullName, fileInfoList);
}
catch (Exception ex)
{
Logger.Write("Exception in Helper.EnumerateFiles", ex);
}
}