Question

Is possible to get all directories, subdirectories and files with recursion.

I do this because i want to increase my programming logic, and learn how recursion work.

I know to do that with this way:

 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();

But i don’t do that with recursion way, so ff someone can to do this, i’ll be grateful to him.

Answer 1

Going by the code you posted – you seem to want some user interaction – so try something like this:

 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);
        }
    }
}

And call with something like this:

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

        Console.ReadLine();
    }
}

HTH