Creating and deleting a temp file

CodingLover

I want to create a temp file do some process and delete it. I've create a temp file like this. szTempFile = new TCHAR[MAX_PATH]; if(!::GetTempFileName(".","temp",0,szTempFile)) { return -1; } It's creating a temp file on the current working folder. Then I try to delete the file as follows. if(szTempFile != NULL) { //delete szTempFile; HRESULT b = ::DeleteFile(szTempFile); } This not delete the file. When I check the path it's valid but the result of parameter b is 0. Can someone help me to find the error.

I appreciate your help all the time... CodingLover :)

_Superman_

Call GetLastError after DeleteFile and check what it returns.

«_Superman_» I love work. It gives me something to do between weekends.

CodingLover

Yes, I got the error code as 32. I'm mess with the finding what it means.

I appreciate your help all the time... CodingLover :)

_Superman_

It means the file is in use. You can delete the file only after it is closed using CloseHandle.

«_Superman_» I love work. It gives me something to do between weekends.

Nishad S

You might not closing the file properly.

- ns ami -

CodingLover

Can you bit explain how to use a handle for the file. I just use TCHAR buffer to hold the path. I hope your clear with my previous code segment.

I appreciate your help all the time... CodingLover :)

CodingLover

As Superman says, closing the file? Can you please explain a bit more how to do it. Actually I don't have handler to the file, in my code posted before.

I appreciate your help all the time... CodingLover :)

Nishad S

How is the file opened (or used)?

- ns ami -

CodingLover

I use SHCreateStreamOnFile stream on the file. Something like this. if (FAILED(hr = SHCreateStreamOnFile(szTempFile, STGM_CREATE | STGM_WRITE, &pOutFileStream)))

I appreciate your help all the time... CodingLover :)

Soundman32 2

I wonder if Windows is expecting you to call CreateFile on the filename before you delete it? Have you looked at http://msdn.microsoft.com/en-us/library/aa363875(VS.85).aspx[^] which gives an example of creating and using a temporary file?

_Superman_

What are you doing after creating the temporary file? Are you opening it using fopen or CreateFile? What operations are you doing with the file?

«_Superman_» I love work. It gives me something to do between weekends.

Iain Clarke Warrior Programmer

That stream creation call will be opening the file. Then you'll need to make sure you call

pOutFileStream->Release ()

at a convenient moment. Iain.

Codeproject MVP for C++, I can't believe it's for my lounge posts...

_Superman_

I read that you're using SHCreateStreamOnFile to open the file. So you must call pOutFileStream->Release() before you can call DeleteFile.

«_Superman_» I love work. It gives me something to do between weekends.

CodingLover

Yes I've already close the stream before delete the file. What I'm doing is, create a temp file, then write some data to it. And then read the content into ostream and use that stream for processing. I want to delete the temp file. When I check the temp file path it's on working folder, like this.

.\ad.tmp

It wont be a case right?

I appreciate your help all the time... CodingLover :)

CodingLover

Thanks a lot my friends. I've solve my problem. Actually I didn't properly close one of stream handler in the process. Thanks again.

I appreciate your help all the time... CodingLover :)