Can't edit existing pdf docs

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   I've got a pdf document (that I did not create) that I need to add some text to. However, whenever I try and use DrawText on the document, nothing happens. Even if I insert a new page and try to draw on it, nothing happens. Its only new documents that I create with QuickPDF that I can write to. Is this a limitation of the software, or am I missing something here?

I'm looking for the ability to add a new page with some content in the beginning, and then add a watermark on each page. This is being done in C#. Can anyone assist me with these issues?

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nwebster Members Profile Find Members Posts Beginner Joined: 26 Mar 09 Status: Offline Points: 3	Post Options Post Reply Quote nwebster Report Post Thanks(0) Quote Reply Topic: Can't edit existing pdf docs Posted: 26 Mar 09 at 5:38PM
	I've got a pdf document (that I did not create) that I need to add some text to. However, whenever I try and use DrawText on the document, nothing happens. Even if I insert a new page and try to draw on it, nothing happens. Its only new documents that I create with QuickPDF that I can write to. Is this a limitation of the software, or am I missing something here? I'm looking for the ability to add a new page with some content in the beginning, and then add a watermark on each page. This is being done in C#. Can anyone assist me with these issues?

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3524	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 26 Mar 09 at 5:56PM
	Hi Noah! What i can tell you first is .. What you wanna do is possible. Adding something is always a good job for QuickPDF - Removing content is for each pdf-library a hard job ;-) Please have a look here: http://www.quickpdf.org/forum/forum_posts.asp?TID=1035 If the file is existing after the unlock-function you have to use LoadFromFile ... Please use the search-function from the menu above and search for "DrawText"... I'm pretty sure that you#ve written something on your samples but perhaps it's too small or out of the normal range 'cause you didn't set the starting main values like SetMeasurementUnits and SetOrigin. Don't be afraid - It's easy with QuickPDF! Cheers, Ingo

nwebster Members Profile Find Members Posts Beginner Joined: 26 Mar 09 Status: Offline Points: 3	Post Options Post Reply Quote nwebster Report Post Thanks(0) Quote Reply Posted: 26 Mar 09 at 6:04PM
	Thanks. I've tried setting the Origin to 1, and I left the standard units as is. But it won't draw on an existing pdf file. Only when I create a new pdf. When I do this: pdfLibrary.NewDocument(); pdfLibrary.DrawText(100, 500, "sample text here"); pdfLibrary.SaveToFile("samplefile.pdf"); It works fine. But when I do this: pdfLibrary.LoadFromFile("originalpdf.pdf"); pdfLibrary.DrawText(100, 500, "sample text here"); pdfLibrary.SaveToFile("samplefile.pdf"); It doesn't work. I can delete and add pages to the existing doc, but can't use drawtext (or draw anything for that matter) on it.

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3524	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 26 Mar 09 at 6:08PM
	Hi Noah! Is the original pdf encrypted (Then first unencrypt it)? Is there a main or user password (then first unlock the file with the correct password)? BTW: It's more clean if you#re using a new layer if you want to add text. Cheers, Ingo