请问如何得到一个文件是否处于正在写的状态?

[XiaoDi_Liu]

我有一些文件进行检索,有的文件可能处于不断被写的状态.请问如何判定文件是否处于正在写的状态,谢谢!

[XiaoDi_Liu]

up

[vcforever]

用这个函数来创建一个句柄
HANDLE FindFirstChangeNotification(
LPCTSTR lpPathName, // 目录名称
BOOL bWatchSubtree, // monitoring option
DWORD dwNotifyFilter // 在这里可以设置为FILE_NOTIFY_CHANGE_LAST_WRITE
);

下面是一段示例代码

DWORD dwWaitStatus;
HANDLE dwChangeHandles[2];

// Watch the C:\WINDOWS directory for file creation and
// deletion.

dwChangeHandles[0] = FindFirstChangeNotification(
"你要监视的目录", // directory to watch
TRUE, // watch the subtree
FILE_NOTIFY_CHANGE_LAST_WRITE); // watch file name changes

if (dwChangeHandles[0] == INVALID_HANDLE_VALUE)
ExitProcess(GetLastError());

// Watch the C:\ subtree for directory creation and
// deletion.

dwChangeHandles[1] = FindFirstChangeNotification(
"C:\\", // directory to watch
TRUE, // watch the subtree
FILE_NOTIFY_CHANGE_DIR_NAME); // watch dir. name changes

if (dwChangeHandles[1] == INVALID_HANDLE_VALUE)
ExitProcess(GetLastError());

// Change notification is set. Now wait on both notification
// handles and refresh accordingly.

while (TRUE)
{

// Wait for notification.

dwWaitStatus = WaitForMultipleObjects(2, dwChangeHandles,
FALSE, INFINITE);

switch (dwWaitStatus)
{
case WAIT_OBJECT_0:

// A file was created or deleted in C:\WINDOWS.
// Refresh this directory and restart the
// change notification. RefreshDirectory is an
// application-defined function.

RefreshDirectory("C:\\WINDOWS")
if ( FindNextChangeNotification(
dwChangeHandles[0]) == FALSE )
ExitProcess(GetLastError());
break;

case WAIT_OBJECT_0 + 1:

// A directory was created or deleted in C:\.
// Refresh the directory tree and restart the
// change notification. RefreshTree is an
// application-defined function.

RefreshTree("C:\\");
if (FindNextChangeNotification(
dwChangeHandles[1]) == FALSE)
ExitProcess(GetLastError());
break;

default:
ExitProcess(GetLastError());
}
}

你可以通过ms-help://MS.MSDNQTR.2002JAN.1033/fileio/filesio_1545.htm获得详细解释

希望对你有所帮助！

[bluebohe]

vcforever:
你知道CFileFind如何按照一定的顺序搜索文件吗?比如时间顺序\大小顺序等等,赫赫,昨天我用到但是找了半天没找到,谢谢

[lygfqy]

_access()

[xiaohonghong]

用标志

[XiaoDi_Liu]

我的要求是这样的:
我检索到许多文件,有可能最后的几个正在被另外一个线程往里写数据.我想判断是否在已经写好关闭状态还是正在被写数据.谢谢!