详解如何在C#中循环访问目录树

using System.IO;

void TraverseDirectory(DirectoryInfo directory)
{
    // 处理当前目录下的文件
    FileInfo[] files = directory.GetFiles();
    foreach (FileInfo file in files)
    {
        // 对文件执行操作
    }

    // 递归访问子目录
    DirectoryInfo[] subDirectories = directory.GetDirectories();
    foreach (DirectoryInfo subDirectory in subDirectories)
    {
        TraverseDirectory(subDirectory);
    }
}

using System;
using System.IO;

class Program
{
    static void Main()
    {
        string rootPath = @"C:\Your\Directory\Path"; // 替换为你的根目录路径
        DirectoryInfo rootDirectory = new DirectoryInfo(rootPath);

        if (rootDirectory.Exists)
        {
            TraverseDirectory(rootDirectory);
        }
        else
        {
            Console.WriteLine("The specified directory does not exist.");
        }
    }

    static void TraverseDirectory(DirectoryInfo directory)
    {
        // 处理当前目录下的文件
        FileInfo[] files = directory.GetFiles();
        foreach (FileInfo file in files)
        {
            Console.WriteLine($"File: {file.FullName}");
        }

        // 递归访问子目录
        DirectoryInfo[] subDirectories = directory.GetDirectories();
        foreach (DirectoryInfo subDirectory in subDirectories)
        {
            Console.WriteLine($"Directory: {subDirectory.FullName}");
            TraverseDirectory(subDirectory);
        }
    }
}

try
{
    TraverseDirectory(rootDirectory);
}
catch (UnauthorizedAccessException)
{
    Console.WriteLine("Access denied to one or more directories.");
}
catch (DirectoryNotFoundException)
{
    Console.WriteLine("The specified directory was not found.");
}
catch (Exception e)
{
    Console.WriteLine($"An unexpected error occurred: {e.Message}");
}

public class StackBasedIteration
{
	static void Main(string[] args)
	{
		// Specify the starting folder on the command line, or in
		// Visual Studio in the Project > Properties > Debug pane.
		TraverseTree(args[0]);
		Console.WriteLine("Press any key");
		Console.ReadKey();
	}
	public static void TraverseTree(string root)
	{
		// Data structure to hold names of subfolders to be
		// examined for files.
		Stack<string> dirs = new Stack<string>(20);
		if (!System.IO.Directory.Exists(root))
		{
		throw new ArgumentException();
	}
	dirs.Push(root);
	while (dirs.Count > 0)
	{
		string currentDir = dirs.Pop();
		string[] subDirs;
		try
		{
		subDirs = System.IO.Directory.GetDirectories(currentDir);
		}
		// An UnauthorizedAccessException exception will be thrown if we do not have
		// discovery permission on a folder or file. It may or may not be acceptable
		// to ignore the exception and continue enumerating the remaining files and
		// folders. It is also possible (but unlikely) that a DirectoryNotFound exception
		// will be raised. This will happen if currentDir has been deleted by
		// another application or thread after our call to Directory.Exists. The
		// choice of which exceptions to catch depends entirely on the specific task
		// you are intending to perform and also on how much you know with certainty
		// about the systems on which this code will run.
		catch (UnauthorizedAccessException e)
		{
			Console.WriteLine(e.Message);
			continue;
		}
		catch (System.IO.DirectoryNotFoundException e)
		{
			Console.WriteLine(e.Message);
			continue;
		}
		string[] files = null;
		try
		{
			files = System.IO.Directory.GetFiles(currentDir);
		}
		catch (UnauthorizedAccessException e)
		{
			Console.WriteLine(e.Message);
			continue;
	}
	catch (System.IO.DirectoryNotFoundException e)
	{
		Console.WriteLine(e.Message);
		continue;
	}
	// Perform the required action on each file here.
	// Modify this block to perform your required task.
	foreach (string file in files)
	{
		try
		{
			// Perform whatever action is required in your scenario.
			System.IO.FileInfo fi = new System.IO.FileInfo(file);
			Console.WriteLine("{0}: {1}, {2}", fi.Name, fi.Length, fi.CreationTime);
		}
		catch (System.IO.FileNotFoundException e)
		{
			// If file was deleted by a separate application
			// or thread since the call to TraverseTree()
			// then just continue.
			Console.WriteLine(e.Message);
			continue;
		}
	}
	// Push the subdirectories onto the stack for traversal.
	// This could also be done before handing the files.
	foreach (string str in subDirs)
		dirs.Push(str);
		}
	}
}