directoryextractor.cs

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using System;
using System.Collections.Generic;
using System.Text;
using System.IO;

namespace DirectoryService
{
    public  class DirectoryExtractor
    {
        public static string GetFilesName()
        {
            return GetDrives();
        }
        public static string GetFilesName(string path)
        {
            return GetFilesName(path, "");
        }

        public static string GetFilesName(string path,string strExtension)
        {
            DirectoryInfo _DirectoryInfo;
            FileInfo[] FInfo;
            DirectoryInfo[] DInfo;
            if(path.Equals("desktop"))
            {
                return Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
            }

            if (path.Equals("document"))
            {
                return Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
            }

            _DirectoryInfo = new DirectoryInfo(path);
            if (!_DirectoryInfo.Exists)
            {
                throw new DirectoryNotFoundException("Path not found");
            }

            string strPattern = "*." + strExtension;
            string strDirectorySeparator = "|";
            string strFileSeparator = ">";
            string strFileNameList = "";
            DInfo = _DirectoryInfo.GetDirectories();
            foreach (DirectoryInfo dir in DInfo)
            {

                strFileNameList += dir.Name + strDirectorySeparator;
            }

            if (strExtension.Length == 0)
            {
                FInfo = _DirectoryInfo.GetFiles();
            }
            else
            {
                FInfo = _DirectoryInfo.GetFiles(strPattern);
            }

            foreach(FileInfo f in FInfo)
            {
                strFileNameList += f.Name + strFileSeparator;
            }
            return strFileNameList;
        }

        private static string GetDrives()
        {
            string strDriveList = "";
            string strDriveSeparator = "<";
            DriveInfo[] _DriverInfoList = DriveInfo.GetDrives();
            foreach(DriveInfo d in _DriverInfoList)
            {
                strDriveList += d.Name + strDriveSeparator;
            }
            return strDriveList;
        }
    }
}