Question

我一直致力于一个项目，在这个项目中，软件只需要删除40,000多个文件目录中其他地方（硬链接）链接的文件。我已经使用以下功能取得了一些成功：

        [StructLayout(LayoutKind.Sequential)]
        public struct BY_HANDLE_FILE_INFORMATION
        {
            public uint FileAttributes;
            public FILETIME CreationTime;
            public FILETIME LastAccessTime;
            public FILETIME LastWriteTime;
            public uint VolumeSerialNumber;
            public uint FileSizeHigh;
            public uint FileSizeLow;
            public uint NumberOfLinks;
            public uint FileIndexHigh;
            public uint FileIndexLow;
        }       

        [DllImport("kernel32.dll", SetLastError = true)]
        static extern bool GetFileInformationByHandle(SafeFileHandle handle, out BY_HANDLE_FILE_INFORMATION lpFileInformation);

        [DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
        static extern SafeFileHandle CreateFile(
           string lpFileName,
           [MarshalAs(UnmanagedType.U4)] FileAccess dwDesiredAccess,
           [MarshalAs(UnmanagedType.U4)] FileShare dwShareMode,
           IntPtr lpSecurityAttributes,
           [MarshalAs(UnmanagedType.U4)] FileMode dwCreationDisposition,
           [MarshalAs(UnmanagedType.U4)] FileAttributes dwFlagsAndAttributes,
           IntPtr hTemplateFile);

        [DllImport("kernel32.dll", SetLastError = true)]
        [return: MarshalAs(UnmanagedType.Bool)]
        static extern bool CloseHandle(SafeHandle hObject);

        public static int GetFileLinkCount(string filepath)
        {
            try
            {
                int result = 0;
                SafeFileHandle handle = CreateFile(filepath, FileAccess.Read, FileShare.Read, IntPtr.Zero, FileMode.Open, FileAttributes.Archive, IntPtr.Zero);
                BY_HANDLE_FILE_INFORMATION fileInfo = new BY_HANDLE_FILE_INFORMATION();
                if (GetFileInformationByHandle(handle, out fileInfo))
                    result = (int)fileInfo.NumberOfLinks;
                CloseHandle(handle);
                return result;
            }
            catch { return 1; }
        }

当我致电GetFileLinkCount时，我得到了我想要的东西（值＆gt; 1确认该文件是硬链接。）。但是，当我遍历目录中的所有文件夹并继续调用GetFileLinkCount时，程序进入中断模式并抛出System.Runtime.InteropServices.SEHException: 'External component has thrown an exception.'，这对我的调试没有帮助。这就是我所说的：

string[] paths = Directory.GetFiles("E:\\P3D", "*", SearchOption.AllDirectories);

for(int i = 0; i < paths.Length; i++)
{
    if (GetFileLinkCount(paths[i]) > 1)
    {
        File.Delete(paths[i]);
    }
}

几秒钟后，应用程序崩溃并出现上述异常。这很奇怪，因为有些硬链接被删除了，但有些硬链接没有被删除，因为应用程序在完成循环之前崩溃了。任何帮助将不胜感激！

搜索目录并删除所有具有硬链接的文件？

0 个答案: