Controlling access to PDF content is essential for organizations looking to protect sensitive information. This guide explains how to apply restrictions to a PDF using Adobe PDF Library (APDFL) in a .NET Core environment, specifically to prevent... Read More

For this API: PDDocSetNewCryptHandler(document, ASAtomFromString("Standard")); The API Reference says: newCryptHandler - The ASAtom for the name of the new security handler to use for the document. This name must be the same as the pdfName used when... Read More

The standard security provided in a PDF document consists of two different methods, each with its own type of password.  The User password controls the ability to open the document. This password encrypts the file and prevents someone without the... Read More

In order to change permission on a document, you must have a password that permits you to change permissions, and you must open the document with that password. Call PDDocGetPermissions() to see if you have the authority to change permissions for a... Read More

Datalogics offers sample programs to demonstrate how to block out, or redact, text found in a PDF document. These samples can be found in the /Security folder. C++ Samples: AddRedaction AddRegexRedaction .NET, .NET Framework and Java Samples: ... Read More

Add the member flattenNoLimit to the PDPageDrawParams structure.  This will help if lines are missing from your output file. When this value is set to True, Adobe PDF Library will ignore some limits on the Flattener to ensure the user gets the best... Read More

Adobe PDF Library does not offer a single interface that will allow control of both Optional Content and Annotations at the same time for a PDF document. PDPageDrawContentsToMemory() allows selection of Annotation faces, but does not have control for... Read More

If the input document was originally rendered with no smoothing or antialiasing of any kind, you are essentially starting with a lot of glyphs that all have extremely rough edges, being rendered with nothing but black or white squares. If this is... Read More

You see this message when rendering or printing the PDF because of the PDF content for that page. The PDF Library is rendering the pages as they're designed. This document has gone through a workflow where the PDF form content has been removed... Read More

APDFL lets the client define the output color spaces. The APIs in Adobe PDF Library that set the default output color spaces are: PDPrefSetWorkingRGB PDPrefSetWorkingCMYK PDPrefSetWorkingGray These allow the client application to pass in an ICC... Read More