How can I perform full recursive directory & file scan?

Question

here is my code:

    private static void TreeScan(string sDir)
    {
        foreach (string d in Directory.GetDirectories(sDir))
        {
            foreach (string f in Directory.GetFiles(d))
            {
                //Save file f
            }
        }
        TreeScan(d, client);
    }

The problem is that it doesn't get the FILES of the sDir (Starting Directory) it only gets the Folders and the Files in the Sub Folders.

How can I make it get the files from the sDir too ?

score 49 · Answer 1 · answered Jul 07 '11 at 01:36

49

Don't reinvent the wheel, use the overload of GetFiles that allows you to specify that it searches subdirectories.

string[] files 
    = Directory.GetFiles(path, searchPattern, SearchOption.AllDirectories);

answered Jul 07 '11 at 01:36

Anthony Pegram

123,721
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2

Finally someone with some sense. – Jesus Ramos Jul 07 '11 at 02:00
1

Yes but recursion fails on first protected with a folder System.UnauthorizedAccessException. – MuiBienCarlota Mar 06 '14 at 10:45
if you don't require a search pattern, you can use an asterisk (*) for search pattern to return all directories – Evan Parsons Nov 30 '15 at 13:58

score 9 · Accepted Answer · edited Jul 07 '11 at 01:53

9

private static void TreeScan( string sDir )
{
    foreach (string f in Directory.GetFiles( sDir ))
    {
        //Save f :)
    }
    foreach (string d in Directory.GetDirectories( sDir ))
    {
        TreeScan( d ); 
    }
}

edited Jul 07 '11 at 01:53

Danpe

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answered Jul 07 '11 at 01:35

Joel Lucsy

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Paul Sasik · Answer 3 · 2011-07-07T01:58:19.107

There are some problems with your code. For one, the reason you never saw the files from the root folder is because your recursed before doing and file reads. Try this:

public static void Main()
{
    TreeScan(@"C:\someFolder");
}

private static void TreeScan(string sDir)
{
    foreach (string f in Directory.GetFiles(sDir))
        Console.WriteLine("File: " + f); // or some other file processing

    foreach (string d in Directory.GetDirectories(sDir))
        TreeScan(d); // recursive call to get files of directory
}

score 1 · Answer 4 · answered Jul 07 '11 at 01:35

1

You have to use

Directory.GetFiles(targetDirectory);

like in This sample, wich contains a complete implementation of what you're looking for

answered Jul 07 '11 at 01:35

james_bond

6,778
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score 0 · Answer 5 · answered Apr 17 '15 at 21:15

0

If using Fx4 and above the EnumerateFiles method will return all files with efficient memory management, whereas GetFiles can require max resources on big directories (or drives).

var files = Directory.EnumerateFiles(dir.Path, "*.*");

answered Apr 17 '15 at 21:15

2Yootz

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score 0 · Answer 6 · answered Jul 07 '11 at 01:40

Your GetFiles loop should be outside the GetDirectories loop. And shouldn't your TreeScan stay inside GetDirectories loop? In short the code should look like this:

private static void TreeScan(string sDir)
{
    foreach (string d in Directory.GetDirectories(sDir))
    {
        TreeScan(d, client);
    }
    foreach (string f in Directory.GetFiles(d))
    {
        //Save file f
    }
}

How can I perform full recursive directory & file scan?

6 Answers6

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