Preserving Adobe Extended Features

Aspose.PDF Product Family
1

Is it possible to preserve adobe extended features when applying/removing privileges and/or when stamping a watermark? It does not seem to be working for me.

2

@bobli123

You can use incremental saving approach using FileStream in order to preserve extended features as follows:

FileStream fs = new FileStream(dataDir + "input.pdf", FileMode.Open, FileAccess.ReadWrite);
// Instantiate Document instance
Aspose.Pdf.Document pdfDocument = new Aspose.Pdf.Document(fs);
// Perform other stuff
// Save the updated document in save FileStream
pdfDocument.Save();
// Close the File Stream object
fs.Close();

In case you face any issue, please share your sample PDF along with sample code snippet. We will test the scenario in our environment and address it accordingly.

3

Would the same be possible when using a memory stream (which has the bytes to a pdf), instead of a filestream? (Which is what I’m trying to do at the moment)

4

sample1.pdf (146.4 KB)
When I try and use the following code

            FileStream fs = new FileStream(@"C:\sample1.pdf", FileMode.Open, FileAccess.ReadWrite);
            // Instantiate Document instance
            Aspose.Pdf.Document pdfDocument = new Aspose.Pdf.Document(fs);
            // Perform other stuff

            var fileSecurity = new PdfFileSecurity(pdfDocument);
            var privilege = DocumentPrivilege.AllowAll;

            PdfFileSignature sign = new PdfFileSignature();
            sign.BindPdf(pdfDocument);
            sign.RemoveUsageRights();

            privilege.AllowPrint = true;
            privilege.AllowDegradedPrinting = true;

            fileSecurity.SetPrivilege(privilege);

            // Save the updated document in save FileStream
            pdfDocument.Save();
            // Close the File Stream object
            fs.Close();

and open the file on adobe acrobat reader dc, I get the message “Please fill out the following form. You cannot save data typed into this form.”

5

@bobli123

We are testing the scenario and will get back to you soon.

6

Alright, thanks!