Processing Multiple sub-directories and all files in each directory - c#-4.0

Question

Hoping someone can help me here, I'm not very familiar with working with directories. My application compresses files and stores them in a media directory as well as stores them in the database, This works well if I create the directory and actually call each file separately.
But I would like to make it dynamic, and process all folders under the install folder, For every directory under this directory I would like to process each directory and all the files within that directory.
What I have tried:
public class SetupFiles : ISetupFiles
{
private readonly ISession _session;
private readonly IFileService _fileService;
private readonly IFileProvider _fileProvider;
public SetupFiles(ISession session, IFileService fileService, IFileProvider fileProvider)
{
_session = session;
_fileService = fileService;
_fileProvider = fileProvider;
}
public void Setup()
{
string installPath = ("install/images/");
_session.Transact(session =>
{
DirectoryInfo dir = new DirectoryInfo(installPath);
DirectoryInfo[] subdirectories = dir.GetDirectories();
foreach (var subdirectory in subdirectories)
{
string currentDirName = Directory.GetCurrentDirectory();
var directory = new MediaCategory
{
Name = subdirectory.Name.ToString().ToUpper(),
UrlSegment = subdirectory.Name.Trim().ToLower(),
};
session.Save(directory);
string[] pngFiles = Directory.GetFiles(currentDirName, "*.png", SearchOption.AllDirectories);
string[] jpgFiles = Directory.GetFiles(currentDirName, "*.jpg", SearchOption.AllDirectories);
string[] gifFiles = Directory.GetFiles(currentDirName, "*.gif", SearchOption.AllDirectories);
string[] pdfFiles = Directory.GetFiles(currentDirName, "*.pdf", SearchOption.AllDirectories);
foreach (var currentPngFile in pngFiles)
{
var fileStream = _fileProvider.GetFileInfo(currentPngFile).CreateReadStream();
MediaFile dbpngFile = _fileService.AddFile(fileStream, Path.GetFileName(currentPngFile), "image/png", fileStream.Length, directory);
}
foreach (var currentJpgFile in jpgFiles)
{
var fileStream = _fileProvider.GetFileInfo(currentJpgFile).CreateReadStream();
MediaFile dbjpgFile = _fileService.AddFile(fileStream, Path.GetFileName(currentJpgFile), "image/jpg", fileStream.Length, directory);
}
foreach (var currentGifFile in gifFiles)
{
var fileStream = _fileProvider.GetFileInfo(currentGifFile).CreateReadStream();
MediaFile dbgifFile = _fileService.AddFile(fileStream, Path.GetFileName(currentGifFile), "image/gif", fileStream.Length, directory);
}
foreach (var currentPdfFile in pdfFiles)
{
var fileStream = _fileProvider.GetFileInfo(currentPdfFile).CreateReadStream();
MediaFile dbgifFile = _fileService.AddFile(fileStream, Path.GetFileName(currentPdfFile), "file/pdf", fileStream.Length, directory);
}
}
});
}
But for some reason, I get an error that it can not find the directory.
Any help would be greatly appreciated.
int the Line DirectoryInfo[] subdirectories = dir.GetDirectories(); dir shows the directory but GetDirectories() returns NULL.

Answer 1

I must have had a Brain Fart. lol With help from #ciubotariu-florin I was able to get past this issue.
For anyone else with this issue, wwwroot is an environment folder and is part of web root from IIS config. So to work with Directory() and or DirectoryInfo() you must use IHostingEnvironment this allows you to use IHostingEnvironment.WebRootPath so changing my path from
string installPath = ("install/images/");
to
string installPath = Path.Combine(_env.WebRootPath, "install/images/").ToLower();
solved my issues.