File count from a folder

Question

How do I get number of Files from a folder using ASP NET with C

User · Accepted Answer

System IO Directory myDir   GetMyDirectoryForTheExample    int count   myDir GetFiles   Length

User · Answer

You can use the Directory GetFiles method  Also see Directory GetFiles Method  String  String  SearchOption   You can specify the search option in this overload   TopDirectoryOnly  Includes only the current directory in a search   AllDirectories  Includes the current directory and all the subdirectories in a search operation  This option includes reparse points like mounted drives and symbolic links in the search      searches the current directory and sub directory int fCount   Directory GetFiles path       SearchOption AllDirectories  Length     searches the current directory int fCount   Directory GetFiles path       SearchOption TopDirectoryOnly  Length

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NET methods Directory GetFiles dir  or DirectoryInfo GetFiles   are not very fast for just getting a total file count  If you use this file count method very heavily  consider using WinAPI directly  which saves about 50  of time   Here s the WinAPI approach where I encapsulate WinAPI calls to a C  method   int GetFileCount string dir  bool includeSubdirectories   false    Complete code    Serializable  StructLayout LayoutKind Sequential   private struct WIN32 FIND DATA       public int dwFileAttributes      public int ftCreationTime dwLowDateTime      public int ftCreationTime dwHighDateTime      public int ftLastAccessTime dwLowDateTime      public int ftLastAccessTime dwHighDateTime      public int ftLastWriteTime dwLowDateTime      public int ftLastWriteTime dwHighDateTime      public int nFileSizeHigh      public int nFileSizeLow      public int dwReserved0      public int dwReserved1       MarshalAs UnmanagedType ByValTStr  SizeConst   260       public string cFileName       MarshalAs UnmanagedType ByValTStr  SizeConst   14       public string cAlternateFileName      DllImport  kernel32 dll    private static extern IntPtr FindFirstFile string pFileName  ref WIN32 FIND DATA pFindFileData    DllImport  kernel32 dll    private static extern bool FindNextFile IntPtr hFindFile  ref WIN32 FIND DATA lpFindFileData    DllImport  kernel32 dll    private static extern bool FindClose IntPtr hFindFile    private static readonly IntPtr INVALID HANDLE VALUE   new IntPtr -1   private const int FILE ATTRIBUTE DIRECTORY   16   private int GetFileCount string dir  bool includeSubdirectories   false        string searchPattern   Path Combine dir             var findFileData   new WIN32 FIND DATA        IntPtr hFindFile   FindFirstFile searchPattern  ref findFileData       if  hFindFile    INVALID HANDLE VALUE          throw new Exception  Directory not found      dir        int fileCount   0      do               if  findFileData dwFileAttributes    FILE ATTRIBUTE DIRECTORY                        fileCount                continue                     if  includeSubdirectories  amp  amp  findFileData cFileName         amp  amp  findFileData cFileName                                string subDir   Path Combine dir  findFileData cFileName               fileCount    GetFileCount subDir  true                       while  FindNextFile hFindFile  ref findFileData         FindClose hFindFile        return fileCount      When I search in a folder with 13000 files on my computer - Average  110ms  int fileCount   GetFileCount searchDir  true      using WinAPI    NET built-in method  Directory GetFiles dir  - Average  230ms  int fileCount   Directory GetFiles searchDir       SearchOption AllDirectories  Length    Note  first run of either of the methods will be 60  - 100  slower respectively because the hard drive takes a little longer to locate the sectors  Subsequent calls will be semi-cached by Windows  I guess

User · Answer

int fileCount   Directory GetFiles path         SearchOption AllDirectories  Length     Will Retrieve count of all files in directry and sub directries  int fileCount   Directory GetFiles path         SearchOption TopDirectory  Length     Will Retrieve count of all files in directry but not sub directries  int fileCount   Directory GetFiles path     xml   SearchOption AllDirectories  Length     Will Retrieve count of files XML extension in directry and sub directries

User · Answer

System IO DirectoryInfo dir   new System IO DirectoryInfo  SourcePath    int count   dir GetFiles   Length    You can use this

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The slickest method woud be to use LINQ   var fileCount    from file in Directory EnumerateFiles   H  iPod Control Music      mp3   SearchOption AllDirectories                          select file  Count

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Reading PDF files from a directory   var list   Directory GetFiles   C  ScanPDF      pdf    if  list Length  gt  0

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To get the count of certain type extensions using LINQ you could use this simple code   Dim exts   As String      docx     ppt     pdf    Dim query    From f As FileInfo In directory GetFiles    Where Function f  exts Contains f Extension ToLower      Response Write query Count

User · Answer

Try following code to get count of files in the folder  string strDocPath   Server MapPath  Enter your path here     int docCount   Directory GetFiles strDocPath        SearchOption TopDirectoryOnly  Length

User · Answer

int filesCount   Directory EnumerateFiles Directory  Count

[c#] File count from a folder

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