On 27/12/2012 17:56, Marcos de Carvalho Monteiro wrote:
I'm using ITextSharp version 5.3.5 to PDF signing and annotating. Recently I received just one PDF file which is being corrupted by my annotation procedure specifically from the second page.
I found the problem, but I don't know how to fix it yet. This is what happens.The signature is invisible, but defined for the first page. When you add an annotation to the first page, that annotation is added to the same array that contains the (invisible) widget annotation for the signature. All goes well.
But when you add an annotation to a page without an annotation array, a new annotation array is created. However: for some reason, the Contents array gets corrupted. The first element is changed to a reference to a null object. This is a very strange phenomenon. I've never seen it before.
I need more time to find out why this happens.
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