Convert PDF with password to Image

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   Wayne,

It is safe to always call 
QP.SetAdvancePassword("")  before calling QP.LoadFromFile(), even for PDF files without a password.  You should check the return value from LoadFromFile just to be sure.  If the password is not correct then it will return 2 and the file will not be loaded and the SelectedDocument will not be updated.  Remember that QPL always maintains at least one open document in memory at all times.  When QPL is initialised then that document is a single blank page.
Andrew.

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AndrewC Members Profile Find Members Posts Moderator Group Joined: 08 Dec 10 Location: Geelong, Aust Status: Offline Points: 841	Post Options Post Reply Quote AndrewC Report Post Thanks(0) Quote Reply Topic: Convert PDF with password to Image Posted: 02 May 12 at 3:42PM
	Wayne, It is safe to always call QP.SetAdvancePassword("") before calling QP.LoadFromFile(), even for PDF files without a password. You should check the return value from LoadFromFile just to be sure. If the password is not correct then it will return 2 and the file will not be loaded and the SelectedDocument will not be updated. Remember that QPL always maintains at least one open document in memory at all times. When QPL is initialised then that document is a single blank page. Andrew.

waynefulcher Members Profile Find Members Posts Senior Member Joined: 23 Jun 08 Location: United States Status: Offline Points: 99	Post Options Post Reply Quote waynefulcher Report Post Thanks(0) Quote Reply Posted: 26 Apr 12 at 2:39PM
	That did it. THANKS. Just for future reference. If a PDF has a password like that and I don't know what it is so I load it using SetAdvancePassword('') then what should I expect not to work? Would it just be the SaveToFile() method(s) that dont work?

AndrewC Members Profile Find Members Posts Moderator Group Joined: 08 Dec 10 Location: Geelong, Aust Status: Offline Points: 841	Post Options Post Reply Quote AndrewC Report Post Thanks(0) Quote Reply Posted: 26 Apr 12 at 1:12PM
	In 7.xx you need to call QP.SetAdvancePassword(""); before calling QP.LoadFromFile() The "" is an empty string. It is safe to use this before an LoadFromFile call. Andrew.

waynefulcher Members Profile Find Members Posts Senior Member Joined: 23 Jun 08 Location: United States Status: Offline Points: 99	Post Options Post Reply Quote waynefulcher Report Post Thanks(0) Quote Reply Posted: 19 Apr 12 at 3:23PM
	I have read many posts here and cant seem to find anything quit like the problem I have. I have a situation where I have a PDF file that appears to have a password (which I do not know). I am able to open the PDF with say Adobe Reader and view it with no problems and I can print it with no problems. It never ask me for a password either. What I am trying to do in my Delphi 7 app is simply open the PDF with QuickPDF and render a page to an image file. Of course I am getting an exception when trying to call LoadFromFile() ; I am on version 7.26. There is no specific message in the exception. So to ask simply, is there a way to open a secure pdf if you dont know the password and render the page to an image, not to modify the pdf? Thanks Wayne