c# - 递归获取目录和文件？

Question

可以递归获取所有目录、子目录和文件。

我这样做是因为我想增加我的编程逻辑，并了解递归的工作原理。

我知道用这种方式做到这一点:

 string path = "D://";
            string rezdir,newpath;
            DirectoryInfo di = new DirectoryInfo(path);
            DirectoryInfo[] dir = di.GetDirectories().ToArray();
            for (int i = 0; i < di.GetDirectories().Length; i++)
            {
                Console.WriteLine(dir[i].ToString());
            }
            Console.WriteLine("\n\nChoose File: ");
            rezdir = Console.ReadLine();
            newpath = path + rezdir;
            di = new DirectoryInfo(newpath);
            dir = di.GetDirectories().ToArray();
            for (int i = 0; i < di.GetDirectories().Length; i++)
            {
                Console.WriteLine(dir[i].ToString());
            }
            Console.ReadKey();

但我不会用递归的方式来做，所以如果有人能做到这一点，我将不胜感激。

Answer 1

按照您发布的代码 - 您似乎想要一些用户交互 - 所以尝试这样的事情:

 public static class RecursiveTest
{
    public static string Foo(DirectoryInfo currentPath)
    {
        if (!currentPath.Exists) return string.Empty;

        foreach (var directory in currentPath.EnumerateDirectories())
            Console.WriteLine("Directory {0}", directory.Name);

        foreach (var file in currentPath.EnumerateFiles())
            Console.WriteLine("File {0}", file.Name);

        while(true)
        {
            Console.WriteLine("Choose directory or file: ");
            string chosenPath = Console.ReadLine();

            string newPath = Path.Combine(currentPath.FullName, chosenPath);
            if(Directory.Exists(newPath))
                return Foo(new DirectoryInfo(newPath));

            if(File.Exists(newPath))
                return newPath;

            Console.WriteLine("File {0} doesn't exist!", newPath);
        }
    }
}

然后用这样的方式调用:

class Program
{
    static void Main(string[] args)
    {
        Console.WriteLine(RecursiveTest.Foo(new DirectoryInfo(@"d:\dev")));

        Console.ReadLine();
    }
}

HTH