WINAPI FindFirstFile & FindNextFile problem

Question

Hi all,

I'm trying to get the list of files in a directory using WINAPI functions FindFirstFile and FindNextFile.

The problem is that WIN32_FIND_DATA.cFileName returns only the first character of the file name.

This is a console application created in Microsoft Visual C# 2008 Express Edition.

Here is the code. Do you have any ideas what is wrong?

Thanks

using System;

using System.IO;

using System.Runtime.InteropServices;

namespace DirectoryWINAPI

{

    struct WIN32_FIND_DATA

    {

        public uint dwFileAttributes;

        public System.Runtime.InteropServices.ComTypes.FILETIME ftCreationTime;

        public System.Runtime.InteropServices.ComTypes.FILETIME ftLastAccessTime;

        public System.Runtime.InteropServices.ComTypes.FILETIME ftLastWriteTime;

        public uint nFileSizeHigh;

        public uint nFileSizeLow;

        public uint dwReserved0;

        public uint dwReserved1;

        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]

        public string cFileName;

        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 14)]

        public string cAlternateFileName;

    }

    class Program

    {

        [DllImport("kernel32", CharSet = CharSet.Auto)]

        public static extern IntPtr FindFirstFile(string lpFileName, out WIN32_FIND_DATA lpFindFileData);

        [DllImport("kernel32", CharSet = CharSet.Auto)]

        public static extern bool FindNextFile(IntPtr hFindFile, out WIN32_FIND_DATA lpFindFileData);

        [DllImport("kernel32", CharSet = CharSet.Auto)]

        public static extern bool FindClose(IntPtr hFindFile);

        static void Main(string[] args)

        {

            StreamWriter sw = new StreamWriter("dir.txt", false);

            string dir = Path.GetFullPath(System.IO.Directory.GetCurrentDirectory());

            WIN32_FIND_DATA wfd = new WIN32_FIND_DATA();

            IntPtr h = FindFirstFile((dir + @"\*.*"), out wfd);

            while (FindNextFile(h, out wfd))

                sw.WriteLine(wfd.cFileName);

            FindClose(h);

            sw.Flush();

            sw.Close();

        }

    }

}