CodeGo.net>如何列出硬盘驱动器上的所有文件和文件夹? [英] c# - How to list all files and folders on a hard drive?

问题描述

我想列出程序可以访问的所有文件和文件夹，并将它们写入文本文件.我将如何获得这份清单?我需要一种可以在无法访问的文件夹上捕获或不抛出UnauthorizedAccessExceptions的方法.

I want to list all files and folders that my program has access to and write them to a text file. How would I get the list? I need a way that will catch or not throw UnauthorizedAccessExceptions on folders that are not accessible.

推荐答案

请尝试使用以下代码:

private static IEnumerable<string> Traverse(string rootDirectory)
{
    IEnumerable<string> files = Enumerable.Empty<string>();
    IEnumerable<string> directories = Enumerable.Empty<string>();
    try
    {
        // The test for UnauthorizedAccessException.
        var permission = new FileIOPermission(FileIOPermissionAccess.PathDiscovery, rootDirectory);
        permission.Demand();

        files = Directory.GetFiles(rootDirectory);
        directories = Directory.GetDirectories(rootDirectory);
    }
    catch
    {
        // Ignore folder (access denied).
        rootDirectory = null;
    }

    if (rootDirectory != null)
        yield return rootDirectory;

    foreach (var file in files)
    {
        yield return file;
    }

    // Recursive call for SelectMany.
    var subdirectoryItems = directories.SelectMany(Traverse);
    foreach (var result in subdirectoryItems)
    {
        yield return result;
    }
}

客户代码:

var paths = Traverse(@"Directory path");
File.WriteAllLines(@"File path for the list", paths);

这篇关于CodeGo.net>如何列出硬盘驱动器上的所有文件和文件夹?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！