Add links to a PDF programmatically
Adding links to PDF files is very straight forward. A link in a PDF is actually an annotation and is placed on top of the content that you wish to link. These hotspot links can be added using the following functions:
- AddLinkToFile — add a link to an external file.
- AddLinkToPage — add a link to a page in the same document.
- AddLinkToWeb — add a link to a web page.
- AddLinkToEmbeddedFile — add a link to a file attached to the PDF.
Read more about annotations and hotspot links.
An example of how to use the AddLinkTo* functions is shown below.
/* Add a link to a specific page in an external PDF */ // Set the origin for the co-ordinates to be the // top left corner of the page. DPL.SetOrigin(1); // Adding a link to a page in an external PDF // is easy using the AddLinkToFile function. DPL.AddLinkToFile(200, 100, 60, 20, "Moby_Dick_NT.pdf", 22, 200, 1, 1); // Hyperlinks and text are two separate // elements in a PDF, so we'll draw some // text now so that you know where the // hyperlink is located on the page. DPL.DrawText(205, 114, "Click me!"); // When the Foxit Quick PDF Library object is initiated a blank document // is created and selected in memory by default. So // all we need to do now is save the document to // the local hard disk to see the changes that we've made. DPL.SaveToFile("link_to_another_doc.pdf");
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Updated on May 16, 2022