我正在使用FindFirstChangeNotification()/ ReadDirectoryChangesW()來查看文件夾的更改。它按預期工作。我的問題是:當我嘗試重命名監視文件夾的父級時,我得到訪問被拒絕,錯誤5。我猜我的FCN句柄已打開文件夾以進行通知監視,並且不允許更改父級。FindFirstChangeNotification鎖定父文件夾
有沒有什麼辦法來監視一個子目錄,比如c:\ folder \ subfolder \ anotherfolder \,並且仍然能夠打開命令提示符(或其他程序)並執行「rename c:\ folder \ c:\文件夾2"
這裏是我的代碼片段
//
// Sign up for notifications on the object.
//
m_bWatchSubTree = TRUE;
m_dwWatchFlags =
FILE_NOTIFY_CHANGE_SECURITY | // (0x100) change to security descriptor (NTFSACL?)
FILE_NOTIFY_CHANGE_CREATION | // (0x40) change to creation date
FILE_NOTIFY_CHANGE_LAST_ACCESS | // (0x20) change to last access date
FILE_NOTIFY_CHANGE_LAST_WRITE | // (0x10) any change to the modification date/time of file in the folder
FILE_NOTIFY_CHANGE_SIZE | // (0x08) Size changed
FILE_NOTIFY_CHANGE_ATTRIBUTES | // (0x04) Atributes of something changed
FILE_NOTIFY_CHANGE_DIR_NAME | // (0x02) DIR name change in watched folder rename,create,delete FOLDER
FILE_NOTIFY_CHANGE_FILE_NAME; // (0x01) FILE name change in watched folder. rename,create,delete FILE
CString strObjectPathAndName(_T("c:\\folder\\subfolder\\anotherfolder\\");
m_hChangeHandle = ::FindFirstChangeNotification(strObjectPathAndName, m_bWatchSubTree, m_dwWatchFlags);
if (m_hChangeHandle != INVALID_HANDLE_VALUE)
{
DWORD dwStatus = ::WaitForSingleObject(m_hChangeHandle, INFINITE);
HANDLE hDir = ::CreateFile(strObjectPathAndName,
FILE_LIST_DIRECTORY,
FILE_SHARE_READ | FILE_SHARE_WRITE| FILE_SHARE_DELETE,
NULL, //security attributes
OPEN_EXISTING,
FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OVERLAPPED,
NULL);
DWORD dwBytesReturned = 0;
FILE_NOTIFY_INFORMATION *p = (FILE_NOTIFY_INFORMATION*)nb.GetBuffer();
if (::ReadDirectoryChangesW(hDir, p, nb.GetMaxSize(), m_bWatchSubTree, m_dwWatchFlags, &dwBytesReturned, NULL, NULL))
{
//
// do some stuff
}
}
嗨,感謝您的輸入,但不,我不想監視一個不同的文件夾。當子文件夾是更改通知觀察者的目標時,我特別需要重命名子文件夾的父文件夾。 我的解決方法是始終在頂層進行偵聽,並忽略任何超出我需要範圍的更改通知。 – WebDrive
但是,爲什麼不只是聽你需要的實際子文件夾,如你所說,如果更改將發生重命名其父文件夾。除非我不正確地理解用例 – OhadM