Q:
How to create a link for the text in the PDF?
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A:
As a starting point you may want to take a look at Annotation sample
project:
http://www.pdftron.com/net/samplecode.html#Annotation
// In C# ...
Page dest_page = doc.PageFind(3).Current();
Action goto_action =
Action.CreateGoto(Destination.CreateFitH(dest_page, 0));
Annot link = Annot.CreateLink(doc, new Rect(85, 458, 503, 502),
goto_action);
This code assumes that you know the location (i.e. Rect) where the
hyperlink annotation should be placed. You could use TextExtractor
class or ElementReader->Element->GetBBox (similar to TextExtract
sample project) in order to obtain the bounding box for each text run
or word on the page.