How to handle an exception when Directory.GetFiles () throws an exception when it finds a file name, it doesn't like it?

Question

On a Vista machine with a valid path C: \ Users \ David, a call to Directory.GetFiles (@ "C: \ Users \ David") throws the following ArgumentException on startup as user David, who can view the contents of the directory just fine in Windows Explorer:

System.ArgumentException message: Illegal characters in path.
Argument: ""
Stack trace:
   at System.IO.Path.CheckInvalidPathChars(String path)
   at System.IO.Path.InternalCombine(String path1, String path2)
   at System.IO.Directory.InternalGetFileDirectoryNames(String path, String userPathOriginal, String searchPattern, Boolean includeFiles, Boolean includeDirs, SearchOption searchOption)
   at System.IO.Directory.GetFiles(String path, String searchPattern, SearchOption searchOption)
   at System.IO.Directory.GetFiles(String path)
   at Microsoft.Samples.XFileExplorer.ContentView.CreateContentDataTable(String CurrentFolder) in C:\Users\david\Downloads\MEF Preview 5\MEF Preview 5\Samples\XFileExplorer\XFileExplorer\ContentView.xaml.cs:line 108

A Vista machine that the Mac had access to uses MacFuse, so the directory contains a file similar to the name "._Icon", but should actually contain some invalid characters. I think this is the source of the error. I am left with the problem of what to do when Directory.GetFiles () throws an exception when it encounters a file name that it doesn't like? Are there alternative ways to list the contents of files that do not go through this exception?

Regarding this particular file, I suspect that the file name should contain some characters that are not displayed in Windows Explorer or the command line:

   C:\Users\david>dir ._Icon
   Volume in drive C is Bootcamp
   Volume Serial Number is XXXX-XXX

   Directory of C:\Users\david

   File Not Found

And finally:

   C:\Users\david>dir ._Icon*
   Volume in drive C is Bootcamp
   Volume Serial Number is XXXX-XXX
   Directory of C:\Users\david

   05/25/2008  07:40 AM            43,296 ._Icon
           1 File(s)         43,296 bytes
           0 Dir(s)  58,950,623,232 bytes free

Looking at the file via SMB, it looks like the file is actually called "._Icon?" Every time I try to delete a file from a Mac, it seems that the file immediately appears.

Answer 1

, PInvoke FindFirstFile- . . simmillar?

WIN32 FIND DATA. FindNextFile , 0. cFileName . , .

, , Directory.GetFiles .

:

public const int MAX_PATH = 260;
 public const int MAX_ALTERNATE = 14;

[StructLayout(LayoutKind.Sequential)]
    public struct FILETIME {
    public uint dwLowDateTime;
    public uint dwHighDateTime;
 }; 

[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Unicode)] 
public struct WIN32_FIND_DATA {
    public FileAttributes dwFileAttributes;
    public FILETIME ftCreationTime; 
    public FILETIME ftLastAccessTime; 
    public FILETIME ftLastWriteTime; 
    public int nFileSizeHigh;
    public int nFileSizeLow;
    public int dwReserved0;
    public int dwReserved1;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst=MAX_PATH)] 
    public string cFileName; 
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst=MAX_ALTERNATE)] 
    public string cAlternate; 
}

[DllImport("kernel32", CharSet=CharSet.Unicode)] 
public static extern IntPtr FindFirstFile(string lpFileName, out WIN32_FIND_DATA lpFindFileData);

[DllImport("kernel32", CharSet=CharSet.Unicode)] 
public static extern bool FindNextFile(IntPtr hFindFile, out WIN32_FIND_DATA lpFindFileData);

private long RecurseDirectory(string directory, int level, out int files, out int folders) {
    IntPtr INVALID_HANDLE_VALUE = new IntPtr(-1);
    long size = 0;
    files = 0;
    folders = 0;
    Kernel32.WIN32_FIND_DATA findData;

    IntPtr findHandle;

    // please note that the following line won't work if you try this on a network folder, like \\Machine\C$
    // simply remove the \\?\ part in this case or use \\?\UNC\ prefix
    findHandle = Kernel32.FindFirstFile(@"\\?\" + directory + @"\*", out findData);
    if (findHandle != INVALID_HANDLE_VALUE) {

        do {
            if ((findData.dwFileAttributes & FileAttributes.Directory) != 0) {

                if (findData.cFileName != "." && findData.cFileName != "..") {
                    folders++;

                    int subfiles, subfolders;
                    string subdirectory = directory + (directory.EndsWith(@"\") ? "" : @"\") + 
                        findData.cFileName;
                    if (level != 0)  // allows -1 to do complete search.
                        {
                    size += RecurseDirectory(subdirectory, level - 1, out subfiles, out subfolders);

                    folders += subfolders;
                    files += subfiles;
                    }
                }
            }
            else {
                // File
                files++;

                size += (long)findData.nFileSizeLow + (long)findData.nFileSizeHigh * 4294967296;
            }
        } 
        while (Kernel32.FindNextFile(findHandle, out findData));
        Kernel32.FindClose(findHandle);

    }

    return size;
}

// [Sample by Kåre Smith] // [Minor edits by Mike Liddell]

Answer 2

FYI... , , . Windows NTFS.

http://en.wikipedia.org/wiki/Resource_fork

, Macintosh (MFS, HFS HFS Plus). , , . - , , - .

- Microsoft sysinternals:

NTFS . , "file: stream" . , . NTFS . "echo hello > test: stream". stream, 'test'. , 0, . , 'more < test: stream '( type , ).

Answer 3

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, , ?

Answer 4

, , OSX Windows. DotNet " ", Mac , .

, VB6 interop.scripting filesystemobject, .

FSO .

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