deleting all files from a folder

Tara14

Hi, I have developed an application which creates .mdb files in a specific folder named store. This folder is created during installation. But when the program is uninstalled, since there are additional(new) files in the folder store, the folder does not get deleted from the computer. I thought, maybe I should create a small .exe program that deletes all the .mdbfiles from the store folder before the uninstall is run. The problem here is that I do not know the names of the files in the folder. Is there anyway or any function by which I can find and delete all .mdb files from the folder store? Thanks.

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Hamid Taebi

Is this good? WIN32_FIND_DATA find; SetCurrentDirectory("c:\\temp"); HANDLE handle=FindFirstFile("*.mdb",&find); while(FindNextFile(handle,&find)!=0) DeleteFile(find.cFileName); FindClose(handle); or you can use from //SHFileOperation(...);

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WhiteSky

normanS

Because you do findfirst() and findnext() before you do DeleteFile(), I think this will leave one mdb file behind.

Michael Dunn

You can use SHFileOperation() which takes wildcards.

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Hamid Taebi

No problem we can use from a Do while and yes its right. WIN32_FIND_DATA find; SetCurrentDirectory("c:\\temp"); HANDLE handle=FindFirstFile("*.mdb",&find); do DeleteFile(find.cFileName);//or you can use from //SHFileOperation(...); while(FindNextFile(handle,&find)!=0); FindClose(handle);

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WhiteSky

Sarath C

is it safe(shell API have some dependency on the version?) to use shell API, if we there are some other win32 APi to do the same task? is it faster than Win32 APIs?

SaRath.
_"Before you can learn to recognize what's wrong, you must learn to recognize what's right" - Raymond Chen."

My Blog | Understanding State Pattern_

kakan

According to my experience, it's risky to do changes in a directory structure while doing a FindFirst/Findnext loop. I have had problems doing that (such as deleting the found files) in the past. IMO, ShFileOperation is safer, and I would use it.

Alcohol. The cause of, and the solution to, all of life's problems - Homer Simpson

Tara14

This is the program that I tried.

#include "afxdisp.h"

void main()
{

WIN32\_FIND\_DATA find;
char	aExePath\[\_MAX\_PATH\];
char	aDrive\[\_MAX\_DRIVE\];
char	aDir\[\_MAX\_DIR\];
CString	aPath;

::GetModuleFileName( AfxGetInstanceHandle(),aExePath,sizeof(aExePath));

\_splitpath(aExePath,aDrive,aDir,NULL,NULL);

aPath.Format("%s%s",aDrive,aDir);
aPath =  aPath + "sbh\_store";

SetCurrentDirectory(aPath); 
HANDLE handle=FindFirstFile("\*.mdb",&find);
do
DeleteFile(find.cFileName);
while(FindNextFile(handle,&find)!=0);
FindClose(handle);

}

Here I get the error

nafxcwd.lib(thrdcore.obj) : error LNK2001: unresolved external symbol __endthreadex
nafxcwd.lib(thrdcore.obj) : error LNK2001: unresolved external symbol __beginthreadex

When I comment out CString aPath; ::GetModuleFileName( AfxGetInstanceHandle(),aExePath,sizeof(aExePath)); I do not get the unresolved external symbol error. I guess I am missing something. Please can you tell me what I am not doing right. Have I missed out a header? -- modified at 5:40 Friday 18th August, 2006

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Tara14

I tried using SHFileOperation. But the program is crashing. This is what I did:

SHFILEOPSTRUCT del;

del.hwnd = NULL;
del.wFunc = FO\_DELETE;
del.pFrom = "C:\\\\temp\\\\\*.mdb";
del.fFlags = FOF\_FILESONLY;

SHFileOperation(&del);

Something is wrong here. I tried searching the net, but I am not able to figure it out. Please can you help me. Thanks.

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prasad_som

see this solution

Prasad Notifier using ATL

Tara14

OH! I got it!! The pTo member of the SHFILEOPSTRUCT structure shoud be assigned NULL! Thanks.

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prasad_som

you need to set del.pTo ,too. i.e. set it to NULL if you are not using it. code will be,

SHFILEOPSTRUCT del;
del.hwnd = NULL;
del.wFunc = FO_DELETE;
del.pFrom = "C:\\temp\\*.mdb";
del.fFlags = FOF_FILESONLY;
del.pTo = NULL;
SHFileOperation(&del);

Oh ! you got it right already. :) -- modified at 5:59 Friday 18th August, 2006

Prasad Notifier using ATL

Tara14

Ah! How did I miss it. Thanks a billion!

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Fortitudine Vincimus!_

Kleser

hi, i don't want to give you an answer, instead i would like to ask about how you can make your app create an mdb file. because this is what i trying to do right now. if you don't mind, would you share me you little secret? thanks in advance. cheers -- modified at 10:25 Friday 18th August, 2006

Hamid Taebi

Is your problem solve

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WhiteSky

Tara14

Hello, I use DAO to make the connection. There are some really nice samples that come in msdn. I wrote my own little class to do the stuff taking help from the samples. Here is the database creation part. My database needed to be locked with a password.

//////////////////////////////////////////////////////
/////////********* CREATE DATABASE ***********///////////////////////////

void CDBcreate::CreateDatabase(CString m_strDBName)
{

int dwOptions =0;
dwOptions |=dbVersion30;

//Release table if selected
if (m_pTableDef)
{
m_pTableDef->Close();
delete m_pTableDef;
m_pTableDef = NULL;
}

//close database if open
if (m_pDatabase)
{
m_pDatabase->Close();
delete m_pDatabase;
m_pDatabase=NULL;
}

//create new database
m_pDatabase = new CDaoDatabase;
m_pDatabase->Create(m_strDBName, dbLangGeneral,dwOptions);

CString strConnect( _T( ";pwd=" ) );
COleVariant NewPassword( "password", VT_BSTRT ),OldPassword( "", VT_BSTRT );
DAO_CHECK( m_pDatabase->m_pDAODatabase->NewPassword( V_BSTR( &OldPassword ),
V_BSTR( &NewPassword ) ) );
m_bOpen=TRUE; // flag of currently open table

}

/////////********* END CREATE DATABASE ***********///////////////////////////

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Fortitudine Vincimus!_

Tara14

Yes. Changing the settings helped. But there is something I do not understand. I used ::GetModuleFileName( AfxGetInstanceHandle(),aExePath,sizeof(aExePath)); in my application using mfc. There I had no problem. But in the C++ program that I wrote to delete files form a folder, AfxGetInstanceHandle() was causing assersion failure. I could'nt figure out why. When I changed it to NULL >::GetModuleFileName( NULL,aExePath,sizeof(aExePath)); it worked fine. Why?

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Fortitudine Vincimus!_