VC++ 监视文件（夹）

　　参考：http://www.cnblogs.com/fangkm/archive/2009/03/31/1426526.html

　　WinFileSystemMonitor.h

 C++ Code 

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#pragma once // 文件目录改变的类型 enum tagACTION  {      Added     = 1,           //添加了文件/目录     Removed   = 2,           //删除了文件/目录     Modified  = 3,           //更改了文件/目录     Renamed   = 4            //重命名了文件/目录 }; //定义文件/目录改变后的回调函数指针 typedef  void(*lpFunDealFile)(tagACTION action, LPCTSTR lpszFileSrc, LPCTSTR lpszFileDst); class CWinFileSystemMonitor { public:     CWinFileSystemMonitor();     ~CWinFileSystemMonitor();     /*     * 设置回调函数     */     void SetDealFilePtr( lpFunDealFile pFunDeal );     /*     * 开启监视     */     BOOL StartMonitor( LPCTSTR lpszDir );     /*     * 停止监视     */     void EndMonitor();     /*     * 正在监视？     */     BOOL IsMoniting();          /*     * 回调函数     */     static void ActionProcess(tagACTION action, LPCTSTR lpszFileSrc, LPCTSTR lpszFileDst); private:     //监视文件/目录句柄     HANDLE  m_hDir;     //继续监视     volatile BOOL m_bContinue;          //监视线程句柄     HANDLE  m_hThread;          //回调指针     lpFunDealFile m_pFunDeal;     //监视线程处理函数     static DWORD WINAPI MonitorProc( LPVOID lParam ); };

　　WinFileSystemMonitor.cpp

 

 

 

 C++ Code 

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#include "WinFileSystemMonitor.h" CWinFileSystemMonitor::CWinFileSystemMonitor(void) {     m_hDir       =  NULL;     m_bContinue  =  FALSE;     m_hThread    =  NULL; } CWinFileSystemMonitor::~CWinFileSystemMonitor(void) { } void CWinFileSystemMonitor::SetDealFilePtr(lpFunDealFile pFunDeal) {     ASSERT( pFunDeal != NULL );     m_pFunDeal = pFunDeal; } BOOL CWinFileSystemMonitor::StartMonitor( LPCTSTR lpszDir ) {     ASSERT( m_hThread == NULL );     HANDLE hDir = ::CreateFile(lpszDir,                                GENERIC_READ | FILE_LIST_DIRECTORY,                                FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,                                NULL,                                OPEN_EXISTING,                                FILE_FLAG_BACKUP_SEMANTICS,                                NULL);     if(INVALID_HANDLE_VALUE == hDir)     {         return FALSE;     }     m_hDir = hDir;     m_bContinue = TRUE;     m_hThread = ::CreateThread( NULL, 0, MonitorProc, this, 0, NULL );     if(NULL != m_hThread)     {         SetDealFilePtr(ActionProcess);     }     return (NULL == m_hThread ) ? FALSE : TRUE; } void CWinFileSystemMonitor::EndMonitor() {     ASSERT( m_hThread != NULL );     m_bContinue = FALSE;     DWORD dwRet = ::WaitForSingleObject(m_hThread, 1000);     if(WAIT_TIMEOUT == dwRet)     {         ASSERT( m_hThread != NULL );         ::TerminateThread(m_hThread, -1);     }     ::CloseHandle(m_hDir);     m_hDir = NULL;     m_hThread = NULL; } BOOL CWinFileSystemMonitor::IsMoniting() {     return m_bContinue; } DWORD WINAPI CWinFileSystemMonitor::MonitorProc( LPVOID lParam ) {     CWinFileSystemMonitor *pThis = (CWinFileSystemMonitor *)lParam;     ASSERT( pThis != NULL );     char szBuf[ 2 * ( sizeof ( FILE_NOTIFY_INFORMATION ) + MAX_PATH ) ] = {0};     FILE_NOTIFY_INFORMATION *pNotify = (FILE_NOTIFY_INFORMATION *)szBuf;     DWORD dwBytesReturned = 0;     while( pThis->m_bContinue )     {         if( !::ReadDirectoryChangesW(pThis->m_hDir,                                      pNotify,                                      sizeof(szBuf),                                      TRUE,                                      FILE_NOTIFY_CHANGE_FILE_NAME | FILE_NOTIFY_CHANGE_DIR_NAME |                                      FILE_NOTIFY_CHANGE_ATTRIBUTES | FILE_NOTIFY_CHANGE_SIZE |                                      FILE_NOTIFY_CHANGE_LAST_WRITE | FILE_NOTIFY_CHANGE_LAST_ACCESS |                                      FILE_NOTIFY_CHANGE_CREATION | FILE_NOTIFY_CHANGE_SECURITY,                                      &dwBytesReturned,                                      NULL,                                      NULL ) )         {             break;         }         else         {             WCHAR *pszFileDst = NULL;             WCHAR *pszFileSrc = pNotify->FileName;             pszFileSrc[pNotify->FileNameLength / 2] = L'\0';             if(0 != pNotify->NextEntryOffset)             {                 PFILE_NOTIFY_INFORMATION pNext = (PFILE_NOTIFY_INFORMATION)((char *)pNotify + pNotify->NextEntryOffset);                 pszFileDst = pNext->FileName;                 pszFileDst[pNext->FileNameLength / 2] = L'\0';             }             if(NULL != pThis->m_pFunDeal)             {                 pThis->m_pFunDeal((tagACTION)pNotify->Action, CW2T(pszFileSrc), CW2T(pszFileDst));             }         }     }     return 0; } void CWinFileSystemMonitor::ActionProcess( tagACTION action, LPCTSTR lpszFileSrc, LPCTSTR lpszFileDst ) {     switch (action)     {     case Added:         AfxMessageBox(_T("Added!"));         break;     case Removed:         AfxMessageBox(_T("Removed!"));         break;     case Modified:         AfxMessageBox(_T("Modified!"));         break;     case Renamed:         AfxMessageBox(_T("Renamed!"));         break;     default:         break;     } }

　　一个Demo，仅供参考，欢迎改进！

　　

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