How can I recursively get all non-system directories?

Question

I have recently disabled 8.3 file names on my NTFS volume and noticed a significant decrease (it only takes 25% as much time now) in the amount of time it takes to enumerate a new directory with a very large amount of files. However, this does not apply to existing files.

To change that, I want to create an exe that will recursively go through all of the files on the drive that are not in system folders, move them to a temp directory, and move them back in order to force the 8.3 file name removal on them. I already know how to enumerate through the files of a directory and perform this action on each of them, but I'm not quite sure how to get a list of all the directories on the disk without any system directories included. Is there an Attribute I can look for within a DirectoryInfo object? If not, what other approach can I take to accomplish this?

Answer 1

Here you go. I believe this is what you are after... See FileAttributes for more information.

public void RecursivePathWalk(string directory)
{
    string[] filePaths = Directory.GetFiles(directory);
    foreach (string filePath in filePaths)
    {
        if (IsSystem(filePath))
            continue;

        DoWork(filePath);
    }

    string[] subDirectories = Directory.GetDirectories(directory);
    foreach (string subDirectory in subDirectories)
    {
        if (IsSystem(subDirectory))
            continue;

        RecursivePathWalk(subDirectory);
    }
}

public void DoWork(string filePath)
{
    //Your logic here
}

public bool IsSystem(string path)
{
    FileAttributes attributes = File.GetAttributes(path);
    return (attributes & FileAttributes.System) != 0;
}