List all files and directories in a directory subdirectories

Question

I want to list every file and directory contained in a directory and subdirectories of that directory  If I chose C   as the directory  the program would get every name of every file and folder on the hard drive that it had access to   A list might look like   fd 1 txt fd 2 txt fd a  fd b  fd a 1 txt fd a 2 txt fd a a  fd a b  fd b 1 txt fd b 2 txt fd b a fd b b fd a a 1 txt fd a a a  fd a b 1 txt fd a b a fd b a 1 txt fd b a a  fd b b 1 txt fd b b a

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If you don t have access to a subfolder inside the directory tree  Directory GetFiles stops and throws the exception resulting in a null value in the receiving string      Here  see this answer https   stackoverflow com a 38959208 6310707  It manages the exception inside the loop and keep on working untill the entire folder is traversed

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Create List Of String      public static List lt string gt  HTMLFiles   new List lt string gt       private void Form1 Load object sender  EventArgs e                  HTMLFiles AddRange Directory GetFiles   C  DataBase      txt                 foreach  var item in HTMLFiles                                MessageBox Show item

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I use the following code with a form that has 2 buttons  one for exit and the other to start  A folder browser dialog and a save file dialog   Code is listed below and works on my system Windows10  64    using System  using System IO  using System Collections Generic  using System ComponentModel  using System Data  using System Drawing  using System Linq  using System Text  using System Windows Forms   namespace Directory List        public partial class Form1   Form               public string MyPath               public string MyFileName               public string str                public Form1                         InitializeComponent                          private void cmdQuit Click object sender  EventArgs e                        Application Exit                          private void cmdGetDirectory Click object sender  EventArgs e                        folderBrowserDialog1 ShowDialog                MyPath   folderBrowserDialog1 SelectedPath                  saveFileDialog1 ShowDialog                MyFileName   saveFileDialog1 FileName                  str    Folder       MyPath     r n r n r n                   DirectorySearch MyPath                   var result   MessageBox Show  Directory saved to Disk        MessageBoxButtons OK                   Application Exit                              public void DirectorySearch string dir                            try                               foreach  string f in Directory GetFiles dir                                         str   str   dir           Path GetFileName f       r n                                         foreach  string d in Directory GetDirectories dir                                               DirectorySearch d                                             System IO File WriteAllText MyFileName  str                              catch  System Exception ex                                Console WriteLine ex Message

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The following example the fastest  not parallelized  way list files and sub-folders in a directory tree handling exceptions  It would be faster to use Directory EnumerateDirectories using SearchOption AllDirectories to enumerate all directories  but this method will fail if hits a UnauthorizedAccessException or PathTooLongException    Uses the generic Stack collection type  which is a last in first out  LIFO  stack and does not use recursion  From https   msdn microsoft com en-us library bb513869 aspx  allows you to enumerate all sub-directories and files and deal effectively with those exceptions       public class StackBasedIteration       static void Main string   args                   Specify the starting folder on the command line  or in             Visual Studio in the Project  gt  Properties  gt  Debug pane          TraverseTree args 0             Console WriteLine  Press any key            Console ReadKey               public static void TraverseTree string root                   Data structure to hold names of subfolders to be            examined for files          Stack lt string gt  dirs   new Stack lt string gt  20            if   System IO Directory Exists root                         throw new ArgumentException                      dirs Push root            while  dirs Count  gt  0                        string currentDir   dirs Pop                string   subDirs              try                               subDirs   System IO Directory EnumerateDirectories currentDir     TopDirectoryOnly                              An UnauthorizedAccessException exception will be thrown if we do not have                discovery permission on a folder or file  It may or may not be acceptable                 to ignore the exception and continue enumerating the remaining files and                 folders  It is also possible  but unlikely  that a DirectoryNotFound exception                 will be raised  This will happen if currentDir has been deleted by                another application or thread after our call to Directory Exists  The                 choice of which exceptions to catch depends entirely on the specific task                 you are intending to perform and also on how much you know with certainty                 about the systems on which this code will run              catch  UnauthorizedAccessException e                                                    Console WriteLine e Message                   continue                            catch  System IO DirectoryNotFoundException e                                Console WriteLine e Message                   continue                             string   files   null              try                               files   System IO Directory EnumerateFiles currentDir                              catch  UnauthorizedAccessException e                                 Console WriteLine e Message                   continue                             catch  System IO DirectoryNotFoundException e                                Console WriteLine e Message                   continue                               Perform the required action on each file here                 Modify this block to perform your required task              foreach  string file in files                                try                                          Perform whatever action is required in your scenario                      System IO FileInfo fi   new System IO FileInfo file                       Console WriteLine   0    1    2    fi Name  fi Length  fi CreationTime                                     catch  System IO FileNotFoundException e                                           If file was deleted by a separate application                         or thread since the call to TraverseTree                          then just continue                      Console WriteLine e Message                       continue                                    catch  UnauthorizedAccessException e                                                            Console WriteLine e Message                       continue                                                  Push the subdirectories onto the stack for traversal                 This could also be done before handing the files              foreach  string str in subDirs                  dirs Push str

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Use the GetDirectories and GetFiles methods to get the folders and files   Use the SearchOption AllDirectories to get the folders and files in the subfolders also

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public static void DirectorySearch string dir        try               foreach  string f in Directory GetFiles dir                         Console WriteLine Path GetFileName f                      foreach  string d in Directory GetDirectories dir                         Console WriteLine Path GetFileName d                DirectorySearch d                       catch  System Exception ex                Console WriteLine ex Message            Note  the function shows only names without relative paths

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Some improved version with max lvl to go down in directory and option to exclude folders   using System  using System IO   class MainClass     public static void Main  string   args         var dir     C  directory to print       PrintDirectoryTree dir  2  new string     folder3             public static void PrintDirectoryTree string directory  int lvl  string   excludedFolders   null  string lvlSeperator               excludedFolders   excludedFolders    new string 0        foreach  string f in Directory GetFiles directory                 Console WriteLine lvlSeperator Path GetFileName f                foreach  string d in Directory GetDirectories directory                 Console WriteLine lvlSeperator    -    Path GetFileName d             if lvl  gt  0  amp  amp  Array IndexOf excludedFolders  Path GetFileName d    lt  0                      PrintDirectoryTree d  lvl-1  excludedFolders  lvlSeperator                                input directory   -folder1   file1 txt   -folder2     file2 txt     -folder5       file6 txt   -folder3     file3 txt   -folder4     file4 txt     file5 txt   output of the function  content of folder5 is excluded due to lvl limit and content of folder3 is excluded because it is in excludedFolders array    -folder1   file1 txt   -folder2     file2 txt     -folder5   -folder3   -folder4     file4 txt     file5 txt

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using System IO  using System Text  string   filePaths   Directory GetFiles   path          SearchOption AllDirectories

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string   allfiles   Directory GetFiles  path to dir          SearchOption AllDirectories     where     is pattern to match files  If the Directory is also needed you can go like this    foreach  var file in allfiles        FileInfo info   new FileInfo file       Do something with the Folder or just add them to a list via nameoflist add

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the logical and ordered way   using System  using System Collections Generic  using System IO  using System Reflection   namespace DirLister   class Program       public static void Main string   args                  with reflection I get the directory from where this program is running  thus listing all files from there and all subdirectories         string   st   FindFileDir Path GetDirectoryName Assembly GetEntryAssembly   Location            using   StreamWriter sw   new StreamWriter  listing txt   false                           foreach string s in st                                  I write what I found in a text file                 sw WriteLine s                                      private static string   FindFileDir string beginpath                List lt string gt  findlist   new List lt string gt                 I begin a recursion  following the order             - Insert all the files in the current directory with the recursion            - Insert all subdirectories in the list and rebegin the recursion from there until the end                     RecurseFind  beginpath  findlist             return findlist ToArray               private static void RecurseFind  string path  List lt string gt  list                 string   fl   Directory GetFiles path           string   dl   Directory GetDirectories path           if   fl Length gt 0    dl Length gt 0                           I begin with the files  and store all of them in the list             foreach string s in fl                  list Add s                 I then add the directory and recurse that directory  the process will repeat until there are no more files and directories to recurse             foreach string s in dl                                list Add s                   RecurseFind s  list

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I am afraid  the GetFiles method returns list of files but not the directories  The list in the question prompts me that the result should include the folders as well  If you want more customized list  you may try calling GetFiles and GetDirectories recursively  Try this   List lt string gt  AllFiles   new List lt string gt     void ParsePath string path        string   SubDirs   Directory GetDirectories path       AllFiles AddRange SubDirs       AllFiles AddRange Directory GetFiles path        foreach  string subdir in SubDirs          ParsePath subdir       Tip  You can use FileInfo and DirectoryInfo classes if you need to check any specific attribute

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You could use FindFirstFile which returns a handle and then recursively cal a function which calls FindNextFile This is a good aproach as the structure referenced would be filled with various data such as alternativeName lastTmeCreated modified attributes etc  But as you use  net framework  you would have to enter the unmanaged area

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Directory GetFileSystemEntries exists in  NET 4 0  and returns both files and directories  Call it like so   string   entries   Directory GetFileSystemEntries path       SearchOption AllDirectories     Note that it won t cope with attempts to list the contents of subdirectories that you don t have access to  UnauthorizedAccessException   but it may be sufficient for your needs

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A littlebit simple and slowly but working   if you do not give a filepath basicly use the  fixPath  this is just example     you can search the correct fileType what you want  i did a mistake when i chosen the list name because the  temporaryFileList is the searched file list so carry on that     and the  errorList  is speaks for itself   static public void Search string path  string fileType  List lt string gt  temporaryFileList  List lt string gt  errorList                 List lt string gt  temporaryDirectories   new List lt string gt                string fix     C  Users     Environment UserName                 string fix     C             string folders                 Alap   tvonal megad  sa          if  path Length    0            folders   path            else   path   fix             int j   0          int equals   0          bool end   true           do                        equals   j              int k   0               try                                int foldersNumber                    Directory GetDirectories folders  Count                    int fileNumber   Directory GetFiles folders  Count                     if   foldersNumber    0    fileNumber    0   amp  amp  equals    j                                         for  int i   k  k  lt                       Directory GetDirectories folders  Length                                       temporaryDirectories Add Directory GetDirectories folders  k                            k                                               if  temporaryDirectories Count    j                                                end   false                          break                                            foreach  string files in Directory GetFiles folders                                                 if  files    string Empty                                                        if  fileType Length    0                                                                temporaryDirectories Add files                                                             else                                                                if  files Contains fileType                                                                         temporaryDirectories Add files                                                                                                                      else                                                       break                                                                                      equals                     for  int i   j  i  lt  temporaryDirectories Count                                         folders   temporaryDirectories i                       j                        break                                               catch  Exception ex                                errorList Add folders                    for  int i   j  i  lt  temporaryDirectories Count                                         folders   temporaryDirectories i                       j                        break                                            while  end

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With this you can just run them and chosse the sub folder when console run using System  using System Collections Generic  using System IO  using System Linq  using System Security Cryptography  using System Text  using data Patcher     The patcher XML namespace PatchBuilder   class Program       static void Main string   args                string patchDir          if  args Length    0                        Console WriteLine  quot Give the patch directory in argument quot                patchDir   Console ReadLine                      else                       patchDir   args 0                      if  File Exists Path Combine patchDir   quot patch xml quot                 File Delete Path Combine patchDir   quot patch xml quot              var files   Directory EnumerateFiles patchDir   quot   quot   SearchOption AllDirectories  OrderBy p   gt  p  ToList             foreach  var file in files Where file   gt  file StartsWith  quot patch  Resources quot    ToArray                          files Remove file               files Add file                      var tasks   new List lt MetaFileEntry gt             using  var md5Hasher   MD5 Create                          for  int i   0  i  lt  files Count  i                                  var file   files i                    if   File GetAttributes file   amp  FileAttributes Hidden     0                      continue                   var content   File ReadAllBytes file                   var md5Hasher2   MD5 Create                     var task                       new MetaFileEntry                                               LocalURL   GetRelativePath file  patchDir    quot    quot                            RelativeURL   GetRelativePath file  patchDir    quot    quot                            FileMD5   Convert ToBase64String md5Hasher2 ComputeHash content                            FileSize   content Length                                          md5Hasher2 Dispose                     var pathBytes   Encoding UTF8 GetBytes task LocalURL ToLower                     md5Hasher TransformBlock pathBytes  0  pathBytes Length  pathBytes  0                   if  i    files Count - 1                      md5Hasher TransformFinalBlock content  0  content Length                   else                     md5Hasher TransformBlock content  0  content Length  content  0                    tasks Add task                   Console WriteLine   quot Add  quot    task RelativeURL                              var patch   new MetaFile                               Tasks   tasks ToArray                    FolderChecksum   BitConverter ToString md5Hasher Hash  Replace  quot - quot    quot  quot   ToLower                                   XmlUtils Serialize Path Combine patchDir   quot patch xml quot    patch               Console WriteLine   quot Created Patch in  0    quot   Path Combine patchDir   quot patch xml quot                        Console Read               static string GetRelativePath string fullPath  string relativeTo                var foldersSplitted   fullPath Split new     relativeTo Replace  quot   quot    quot    quot   Replace  quot      quot    quot    quot      StringSplitOptions RemoveEmptyEntries      cut the source path and the  quot rest quot  of the path          return foldersSplitted Length  gt  0   foldersSplitted Last      quot  quot      return the  quot rest quot             and this the patchar for XML export using System Xml Serialization   namespace data Patcher       public class MetaFile                 XmlArray  quot Tasks quot            public MetaFileEntry   Tasks                       get              set                      XmlAttribute  quot checksum quot            public string FolderChecksum                       get              set

[c#] List all files and directories in a directory + subdirectories

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