can u say me the technique or code how to do that please
Göran is being slightly tongue-in-cheek here...
I've already told you how to extract data from a PDF file by using the
Aspose PDF component - that's what it's for...
If you don't want to do that, then that's your choice.
However, as Göran says, you will then have to obtain a copy of the PDF file
format from Adobe.
There are various versions of the PDF file format, all of which are
different.
Then you will have to write your own routines for opening a PDF file,
working out which version it is, and then separating all the various
individual parts until you find what you're looking for.
That's what Aspose did...
Of course, they have a large team of developers.
It might take you a month or even longer, depending on your skill level.
Alternatively, just use the Aspose component...