Вот Вам Native решение:
| Код |
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;
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;
}
|
Взято http://www.pinvoke.net/default.aspx/kernel32/FindFirstFile.html.
У меня результаты тестов были такие:
| Цитата |
GetDirSize - Native. Dir to scan: C:\
Size: 17,1 GB
Time: 11s
GetDirSize - Managed. Dir to scan: C:\
Size: 17,1 GB
Time: 11s
|
Выбирать Вам  |
Я прогу пишу, которая должна динамически для каждого каталога размер выводить... Это мой первый проект на C#, поэтому подскажите, pls, какая из приведенных выше функций будет работать быстрее?
