C++学习之：文件监视

 对于某个系统某个目录变化如何进行监视。监视包含文件的添加、修改、重命名和删除等。在VC驿站上看到的，现在写成blog发表于大家分享。

//监视线程
DWORD WINAPI C***Dlg::ThreadWatchProc( LPVOID lParam )
{
    C***Dlg *obj = (C***Dlg*)lParam;

    obj->m_hDirectory = CreateFile(            //打开目录，得到目录的句柄
        obj->m_strWatchedDir,
        GENERIC_READ|GENERIC_WRITE,
        FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE,
        NULL,
        OPEN_EXISTING,
        FILE_FLAG_BACKUP_SEMANTICS,
        NULL
        );
    if(obj->m_hDirectory ==INVALID_HANDLE_VALUE)
        return false;

    char buf[(sizeof(FILE_NOTIFY_INFORMATION)+MAX_PATH)*2];
    FILE_NOTIFY_INFORMATION* pNotify=(FILE_NOTIFY_INFORMATION*)buf;
    DWORD dwBytesReturned;
    while(true)
    {
        if(::ReadDirectoryChangesW(obj->m_hDirectory,
            pNotify,
            sizeof(buf),
            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))
        {
            char tmp[MAX_PATH], str1[MAX_PATH], str2[MAX_PATH];
            memset(tmp, 0, sizeof(tmp));
            memset(str1,0, sizeof(str1));
            memset(str2,0, sizeof(str2));
            WideCharToMultiByte(CP_ACP,0,pNotify->FileName,pNotify->FileNameLength/2,tmp,99,NULL,NULL);
            strcpy(str1, tmp);

            if(pNotify->NextEntryOffset != 0)
            {
                PFILE_NOTIFY_INFORMATION p = (PFILE_NOTIFY_INFORMATION)((char*)pNotify+pNotify->NextEntryOffset);
                memset(tmp, 0, sizeof(tmp));
                WideCharToMultiByte(CP_ACP,0,p->FileName,p->FileNameLength/2,tmp,99,NULL,NULL);
                strcpy(str2, tmp);
            }
            switch(pNotify->Action)
            {
            case FILE_ACTION_ADDED:
                if(obj->m_bAddNew)
                {
                    CTime tt = CTime::GetCurrentTime();
                    CString strTT;
                    strTT.Format(_T("%d:%d:%d"),tt.GetHour(),tt.GetMinute(),tt.GetSecond());
                    obj->m_listAllInfo.InsertItem(0,obj->m_pszListIndex);
                    obj->m_listAllInfo.SetItemText(0,2,_T("添加了新文件"));
                    obj->m_listAllInfo.SetItemText(0,3,str1);
                    obj->m_listAllInfo.SetItemText(0,1,strTT);

                    pCheckInfo PI = NULL;
                    PI = new tagCheckInfo();
                    strcpy(PI->szIndex,obj->m_pszListIndex);
                    strcpy(PI->szTime,strTT);
                    strcpy(PI->szType,_T("添加了新文件"));
                    strcpy(PI->szDetail,str1);
                    obj->m_vecCI.push_back(PI);
                }
                break;

            case FILE_ACTION_REMOVED:
                if(obj->m_bDelete)
                {
                    CTime tt=CTime::GetCurrentTime();
                    CString strTT;
                    strTT.Format(_T("%d:%d:%d"),tt.GetHour(),tt.GetMinute(),tt.GetSecond());
                    obj->m_listAllInfo.InsertItem(0,obj->m_pszListIndex);
                    obj->m_listAllInfo.SetItemText(0,2,_T("删除了文件"));
                    obj->m_listAllInfo.SetItemText(0,3,str1);
                    obj->m_listAllInfo.SetItemText(0,1,strTT);

                    pCheckInfo PI = NULL;
                    PI = new tagCheckInfo();
                    strcpy(PI->szIndex,obj->m_pszListIndex);
                    strcpy(PI->szTime,strTT);
                    strcpy(PI->szType,_T("删除了文件"));
                    strcpy(PI->szDetail,str1);
                    obj->m_vecCI.push_back(PI);
                }
                break;

            case FILE_ACTION_RENAMED_NEW_NAME:
                if(obj->m_bRename)
                {
                    CTime tt = CTime::GetCurrentTime();
                    CString strTT;
                    strTT.Format(_T("%d:%d:%d"),tt.GetHour(),tt.GetMinute(),tt.GetSecond());
                    obj->m_listAllInfo.InsertItem(0,obj->m_pszListIndex);
                    obj->m_listAllInfo.SetItemText(0,2,_T("重命名了文件"));
                    strcat(str1,_T("->"));
                    obj->m_listAllInfo.SetItemText(0,3,strcat(str1,str2));
                    obj->m_listAllInfo.SetItemText(0,1,strTT);

                    pCheckInfo PI = NULL;
                    PI = new tagCheckInfo();
                    strcpy(PI->szIndex,obj->m_pszListIndex);
                    strcpy(PI->szTime,strTT);
                    strcpy(PI->szType,_T("重命名了文件"));
                    strcpy(PI->szDetail,strcat(str1,str2));
                    obj->m_vecCI.push_back(PI);
                }
                break;

            case FILE_ACTION_RENAMED_OLD_NAME:
                if(obj->m_bRename)
                {
                    CTime tt=CTime::GetCurrentTime();
                    CString strTT;
                    strTT.Format(_T("%d:%d:%d"),tt.GetHour(),tt.GetMinute(),tt.GetSecond());
                    obj->m_listAllInfo.InsertItem(0,obj->m_pszListIndex);
                    obj->m_listAllInfo.SetItemText(0,2,_T("重命名了文件"));
                    strcat(str1,_T(" 改名为 "));
                    obj->m_listAllInfo.SetItemText(0,3,strcat(str1,str2));
                    obj->m_listAllInfo.SetItemText(0,1,strTT);

                    pCheckInfo PI = NULL;
                    PI = new tagCheckInfo();
                    strcpy(PI->szIndex,obj->m_pszListIndex);
                    strcpy(PI->szTime,strTT);
                    strcpy(PI->szType,_T("重命名了文件"));
                    strcpy(PI->szDetail,strcat(str1,str2));
                    obj->m_vecCI.push_back(PI);
                }
                break;

            case FILE_ACTION_MODIFIED:
                if(obj->m_bModify)
                {
                    CTime tt = CTime::GetCurrentTime();
                    CString strTT;
                    strTT.Format(_T("%d:%d:%d"),tt.GetHour(),tt.GetMinute(),tt.GetSecond());
                    obj->m_listAllInfo.InsertItem(0,obj->m_pszListIndex);
                    obj->m_listAllInfo.SetItemText(0,2,_T("修改了文件"));
                    obj->m_listAllInfo.SetItemText(0,3,str1);
                    obj->m_listAllInfo.SetItemText(0,1,strTT);

                    pCheckInfo PI = NULL;
                    PI = new tagCheckInfo();
                    strcpy(PI->szIndex,obj->m_pszListIndex);
                    strcpy(PI->szTime,strTT);
                    strcpy(PI->szType,_T("修改了文件"));
                    strcpy(PI->szDetail,str1);
                    obj->m_vecCI.push_back(PI);
                }
                break;

            default:
                if(obj->m_bOther)
                {
                    CTime tt = CTime::GetCurrentTime();
                    CString strTT;
                    strTT.Format(_T("%d:%d:%d"),tt.GetHour(),tt.GetMinute(),tt.GetSecond());
                    obj->m_listAllInfo.InsertItem(0,obj->m_pszListIndex);
                    obj->m_listAllInfo.SetItemText(0,2,_T("未知变化"));
                    obj->m_listAllInfo.SetItemText(0,3,_T(""));
                    obj->m_listAllInfo.SetItemText(0,1,strTT);

                    pCheckInfo PI = NULL;
                    PI = new tagCheckInfo();
                    strcpy(PI->szIndex,obj->m_pszListIndex);
                    strcpy(PI->szTime,strTT);
                    strcpy(PI->szType,_T("未知变化"));
                    strcpy(PI->szDetail,_T(""));
                    obj->m_vecCI.push_back(PI);
                }
                break;
            }
            obj->m_nListCount++;
            itoa(obj->m_nListCount,obj->m_pszListIndex,10);
        }
        else
            break;
    }
    obj->m_nListCount = 1;
    return 0;
}