void TestDirChanges(LPCWSTR path)
{
/*
FileName member of FILE_NOTIFY_INFORMATION has only one WCHAR according to definition. Most likely, this field will have more characters.
So the expected size of one item is (sizeof(FILE_NOTIFY_INFORMATION) + MAX_PATH * sizeof(WCHAR)).
Prepare buffer for 256 items.
*/
char buf[256 * (sizeof(FILE_NOTIFY_INFORMATION) + MAX_PATH * sizeof(WCHAR))] = {0};
DWORD bytesReturned = 0;
BOOL result = FALSE;
FILE_NOTIFY_INFORMATION *fni = NULL;
HANDLE hDir = CreateFile(path,
FILE_LIST_DIRECTORY | STANDARD_RIGHTS_READ,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
NULL,
OPEN_EXISTING,
FILE_FLAG_BACKUP_SEMANTICS,
NULL);
if (!hDir || hDir == INVALID_HANDLE_VALUE)
{
wprintf(L"CreateFile failed\n");
return;
}
while (1)
{
result = ReadDirectoryChangesW(hDir,
buf,
sizeof(buf)/sizeof(*buf),
TRUE, /* monitor the entire subtree */
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,
&bytesReturned,
NULL,
NULL);
if (result && bytesReturned)
{
wchar_t filename[MAX_PATH];
wchar_t action[256];
for (fni = (FILE_NOTIFY_INFORMATION*)buf; fni;)
{
switch (fni->Action)
{
case FILE_ACTION_ADDED:
wcscpy_s(action, sizeof(action)/sizeof(*action), L"File added:");
break;
case FILE_ACTION_REMOVED:
wcscpy_s(action, sizeof(action)/sizeof(*action), L"File removed:");
break;
case FILE_ACTION_MODIFIED:
wcscpy_s(action, sizeof(action)/sizeof(*action), L"File modified:");
break;
case FILE_ACTION_RENAMED_OLD_NAME:
wcscpy_s(action, sizeof(action)/sizeof(*action), L"File renamed, was:");
break;
case FILE_ACTION_RENAMED_NEW_NAME:
wcscpy_s(action, sizeof(action)/sizeof(*action), L"File renamed, now is:");
break;
default:
swprintf_s(action, sizeof(action)/sizeof(*action), L"Unkonwn action: %ld. File name is:", fni->Action);
}
if (fni->FileNameLength)
{
wcsncpy_s(filename, MAX_PATH, fni->FileName, fni->FileNameLength/2);
filename[fni->FileNameLength/2] = 0;
wprintf(L"%s '%s'\n", action, filename);
}
else
{
wprintf(L"%s <EMPTY>\n", action);
}
if (fni->NextEntryOffset)
{
char *p = (char*)fni;
fni = (FILE_NOTIFY_INFORMATION*)(p + fni->NextEntryOffset);
}
else
{
fni = NULL;
}
}
}
else
{
wprintf(L"ReadDirectoryChangesW failed\n");
}
}
CloseHandle(hDir);
}
我的代碼運行在Win32控制檯很好,但是當我在WIN32項目中使用它,ReadDirectoryChangesW不起作用。它運行並且我的編程停止工作。 請幫助我, 謝謝,ReadDirectoryChangesW在WIN32 API項目中出錯?
什麼是錯誤? – Rohan
當我在WIN32 API Project而不是控制檯上運行它時,我的程序停止工作。我無法關閉它。 –
你如何期望「關掉它」?你有一個無盡的循環(很可能不在一個單獨的線程)。 –