Read Directory & file from appilcation server

Hi Gurus,

I am facing a problem,the rquirement is to First read an directory & then inside that directory ,I need to trad file.

there exist a fn module which reads from file from the directory.But if any sub directory also exist in that main directory ,then it raises an exception.

Can any one provide a way out to read directory first & subsequently a file in that directory,assuming that sub directories too exist in main directory.

Thanks for all forthcoming responses.

Regards,

Gaurav