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  • How to remove restrictions for a secured PDF..? C#

    @aruncstester
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    Hi guys, How to allow copy content option for a secured PDF. Currently am using Spire.PDF library, it is giving result as I except, it is a free version supports only for below 10 page PDFs, but my pdfs have more than 200 pages. Any other solutions?, also worked with PdfSharp library, it is not supporting Adobe 6 featured pdfs. Googled many times, but still am not getting solutions for this..

    here is code for Spire.PDF

    string input = @"C:\xxxx\2006-Catalog.pdf";
string output = @"C:\xxxx\Unlocked-2006-Catalog.pdf ";
PdfDocument doc = new PdfDocument();
doc.LoadFromFile(input);
doc.Security.ResetPermissions(Spire.Pdf.Security.PdfPermissionsFlags.AccessibilityCopyContent);
doc.SaveToFile(output);
Console.WriteLine("Done");
    C# pdf .net
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 2 Answer(s)

  • @Chetan.Sharda
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    over 8 years ago

    Hi,

    The password of secured PDF is mandatory to copy its content. You can open PDF file by this method: Spire.Pdf.PdfDocument(string filename, string password) Then, modify passwords by resetting owner password and user password as empty. Below shows the whole code of modifying passwords of secured PDF file,

     //load a encrypted file and decrypt it
 string input = @"C:\xxxx\2006-Catalog.pdf";
 string output = @"C:\xxxx\Unlocked-2006-Catalog.pdf ";
 PdfDocument doc = new PdfDocument(input, "password");

 //reset PDF passwords and set user password permission
 doc.Security.OwnerPassword = "";
 doc.Security.UserPassword = "";
 doc.Security.Permissions = PdfPermissionsFlags.Print | PdfPermissionsFlags.FillFields;

 //Save pdf file.
 doc.SaveToFile(output);
 doc.Close();

    if you find the answer helpful please mark it correct, so that, other developmentnt community can take advantage.

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