ReadDirectoryChangesW Problem~~~

york528

when i spy the dictionary why some file create,delete,rename or resize,etc couldn't be spy and when file update quickly it will miss some of them this is the code from a filespy demo

static void Action(CSpyDlg* dlg)
{
//CWnd* hwnd = AfxGetMainWnd();
USES_CONVERSION;

HANDLE hDir = CreateFile( CString("d:"), // pointer to the file name
	FILE\_LIST\_DIRECTORY,                // access (read/write) mode
	FILE\_SHARE\_READ|FILE\_SHARE\_DELETE,  // share mode
	NULL,                               // security descriptor
	OPEN\_EXISTING,                      // how to create
	FILE\_FLAG\_BACKUP\_SEMANTICS|FILE\_FLAG\_OVERLAPPED,         // file attributes
	NULL                                // file with attributes to copy
	);
	/\*
	HANDLE hDir = CreateFile( CString("d:"), // pointer to the file name
	FILE\_LIST\_DIRECTORY,                // access (read/write) mode
	FILE\_SHARE\_READ|FILE\_SHARE\_DELETE,  // share mode
	NULL,                               // security descriptor
	OPEN\_EXISTING|CREATE\_NEW|CREATE\_ALWAYS|OPEN\_ALWAYS|TRUNCATE\_EXISTING,                      // how to create
	FILE\_FLAG\_BACKUP\_SEMANTICS|FILE\_ATTRIBUTE\_ARCHIVE|FILE\_ATTRIBUTE\_ENCRYPTED|
	FILE\_ATTRIBUTE\_HIDDEN|FILE\_ATTRIBUTE\_NOT\_CONTENT\_INDEXED|
	FILE\_ATTRIBUTE\_OFFLINE|FILE\_ATTRIBUTE\_READONLY|FILE\_ATTRIBUTE\_SYSTEM|FILE\_ATTRIBUTE\_TEMPORARY,         // file attributes
	NULL                                // file with attributes to copy
	);
\*/
FILE\_NOTIFY\_INFORMATION Buffer\[1024\];
DWORD BytesReturned;
while(ReadDirectoryChangesW(
	hDir,                                  // handle to directory
	&Buffer,                                    // read results buffer
	sizeof(Buffer),                                // length of buffer
	TRUE,                                 // monitoring option
	FILE\_NOTIFY\_CHANGE\_SECURITY|
	FILE\_NOTIFY\_CHANGE\_CREATION|
	FILE\_NOTIFY\_CHANGE\_LAST\_ACCESS|
	FILE\_NOTIFY\_CHANGE\_LAST\_WRITE|
	FILE\_NOTIFY\_CHANGE\_SIZE|
	FILE\_NOTIFY\_CHANGE\_ATTRIBUTES|
	FILE\_NOTIFY\_CHANGE\_DIR\_NAME|
	FILE\_NOTIFY\_CHANGE\_FILE\_NAME,             // filter conditions
	&BytesReturned,              // bytes returned
	NULL,                          // overlapped buffer
	NULL// completion routine
	))
{
	CTime tm = CTime::GetCurrentTime();
	
	CString helper\_txt;
	
	switch(Buffer\[0\].Action)
	{
	case FILE\_ACTION\_ADDED: helper\_txt = "The file was added to the directory"; break; 
	case FILE\_ACTION\_REMOVED: helper\_txt = "The file was removed from the directory";

Nibu babu thomas

york528 wrote:

and when file update quickly it will miss some of them

Here's a solution from MSDN (for NTFS drives) -> http://www.microsoft.com/msj/0999/journal/journal.aspx[^]

Nibu thomas Microsoft MVP for VC++ Code must be written to be read, not by the compiler, but by another human being. Programming Blog: http://nibuthomas.wordpress.com

modified on Thursday, June 12, 2008 11:49 PM

york528 · modified on Thursday, June 12, 2008 11:49 PM

you're right this function dosen't work on NTFS volume when i tried on FAT32 volume it works well thank you

york528 · modified on Thursday, June 12, 2008 11:49 PM

i know Change Journal now but if i wanna it works on NTFS how should i do still:confused::confused:

Nibu babu thomas

york528 wrote:

but if i wanna it works on NTFS how should i do still [Confused] [Confused]

There is a sample application attached with source -> http://download.microsoft.com/download/0/6/7/0678184e-905e-4783-9511-d4dca1f492b4/ChangeJournal.exe[^] Sorry for the delay!

Nibu thomas Microsoft MVP for VC++ Code must be written to be read, not by the compiler, but by another human being. Programming Blog: http://nibuthomas.wordpress.com

york528

the demo got some error error C2065: 'USN_JOURNAL_DATA' : undeclared identifier error C2146: syntax error : missing ';' before identifier 'ujd' error C2065: 'ujd' : undeclared identifier error C2065: 'FSCTL_QUERY_USN_JOURNAL' : undeclared identifier error C2228: left of '.UsnJournalID' must have class/struct/union type error C2228: left of '.FirstUsn' must have class/struct/union type error C2228: left of '.NextUsn' must have class/struct/union type error C2228: left of '.LowestValidUsn' must have class/struct/union type error C2228: left of '.MaxUsn' must have class/struct/union type error C2228: left of '.MaximumSize' must have class/struct/union type error C2228: left of '.AllocationDelta' must have class/struct/union type error C2228: left of '.FirstUsn' must have class/struct/union type error C2039: 'UsnJournalID' : is not a member of 'READ_USN_JOURNAL_DATA' c:\program files\microsoft visual studio\vc98\include\winioctl.h(1873) : see declaration of 'READ_USN_JOURNAL_DATA' error C2228: left of '.UsnJournalID' must have class/struct/union type error C2039: 'FileNameOffset' : is not a member of 'USN_RECORD' c:\program files\microsoft visual studio\vc98\include\winioctl.h(1895) : see declaration of 'USN_RECORD' is there some header file not included??

Nibu babu thomas

You need to install latest platform SDK or if you have the SDK installed change move latest SDK "include path" to top here -> Tools->Options->Directories. I had similar errors! :)

Nibu thomas Microsoft MVP for VC++ Code must be written to be read, not by the compiler, but by another human being. Programming Blog: http://nibuthomas.wordpress.com

york528

where i can get latest platform SDK my ide is VC6.0 i am a Chinese so sometimes i can't quite understand correctly Thanks a lot ;) ;)