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The following code snippet also work with Aspose.PDF.Drawing library.
It is possible to add hyperlinks to PDF files, either to allow readers to navigate to another part of the PDF, or to external content.
In order to add web hyperlinks to PDF documents:
The following code snippet shows you how to add a hyperlink to a PDF file.
Another common scenario is to find a given text in the document using TextFragmentAbsorber and set its region as hyperlinks to the site. Below is a code snippet that implements this.
Aspose.PDF for .NET provides a great feature to PDF creation as well as its manipulation. It also offers the feature to add links to PDF pages and a link can either direct to pages in another PDF file, a web URL, link to launch an Application or even link to pages in same PDF file. In order to add local hyperlinks (links to pages in same PDF file), a class named LocalHyperlink is added to Aspose.PDF namespace and this class has a property named TargetPageNumber, which is used to specify the target/destination page for hyperlink.
In order to add the local hyperlink, we need to create a TextFragment so that link can be associated with the TextFragment. The TextFragment class has a property named Hyperlink which is used to associate LocalHyperlink instance. The following code snippet shows the steps to accomplish this requirement.
Links are represented as annotations in a PDF file and they can be added, updated or deleted. Aspose.PDF for .NET also supports getting the destination (URL) of the hyperlink in PDF file.
To get a link’s URL:
The following code snippet shows how to get hyperlink destinations (URL) from a PDF file.
A hyperlink has two parts: the text that shows in the document, and the destination URL. In some cases, it’s the text rather than the URL we need.
Text and annotations/actions in a PDF file are represented by different entities. Text on a page is just a set of words and characters, while annotations bring some interactivity such as that inherent in a hyperlink.
To find the URL content, you need to work with both annotation and text. The Annotation object does not have itself have the text but sits under the text on the page. So to get the text, the Annotation gives the URL’s bounds, while the Text object gives the URL contents. Please see the following code snippet.
How to Specify PDF Page when Viewing Document explained how to tell a document to open on a different page than the first. When concatenating several documents, and one or more has a GoTo action set, you probably want to remove them. For example, if combining two documents and the second one has a GoTo action that takes you to the second page, the output document will open on the second page of the second document instead of the first page of the combined document. To avoid this behavior, remove the open action command.
To remove an open action:
The following code snippet shows how to remove a document open action from the PDF file.
When viewing PDF files in a PDF viewer such as Adobe Reader, the files usually open on the first page. However, it is possible to set the file to open on a different page.
The XYZExplicitDestination class allows you to specify a page in a PDF file that you want to open. When passing the GoToAction object value to the Document class OpenAction property, the document opens at the page specified against the XYZExplicitDestination object. The following code snippet shows how to specify a page as the document open action.
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