Thursday, August 4, 2011

iTextSharp: Disable PDF Printing

It took me ages to find out how to disable printing on a PDF file. You need to encrypt the file in order set copying and printing settings.  Here's how:

System.Text.UTF8Encoding encoding = new System.Text.UTF8Encoding();
writer.SetEncryption(null, encoding.GetBytes("12345678"), PdfWriter.ALLOW_COPY, PdfWriter.STRENGTH40BITS);

And this is how to enable printing if you still want the pdf to be encrypted.

System.Text.UTF8Encoding encoding = new System.Text.UTF8Encoding();
writer.SetEncryption(null, encoding.GetBytes("12345678"), PdfWriter.ALLOW_COPY | PdfWriter.ALLOW_PRINTING, PdfWriter.STRENGTH40BITS);


16 comments:

  1. Thanks this saved lots of time...

    ReplyDelete
  2. The code is useful to configure the printing mechanism. It's a useful tool.

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  3. Thanks for sharing these wonderful and useful tips. I also experienced same problem and I wasn't able to resolve it, not until I read your blog.
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  5. I'm so grateful that you made this post about this common problem. The code really helps a lot.

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  6. This is useful for secure documents. You can prevent it from being printed without permission.

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  7. Here is the code for VB.Net in pdf files exist

    Policy: No Print

    Params:

    filename =file to apply Encrypt

    strPass = password to apply


    Imports Microsoft.VisualBasic


    Imports System
    Imports System.Collections.Generic
    Imports System.Linq
    Imports System.Web
    Imports System.Web.UI

    Imports iTextSharp.text
    Imports iTextSharp.text.pdf
    Imports iTextSharp.text.api
    Imports System.IO


    Public Class encriptaPDF


    Public Sub EncriptaArchivo(ByVal filename As String, strPass As String)


    Dim FileNew As String

    Dim Encoding As New System.Text.UTF8Encoding()

    Dim reader As New PdfReader(filename)

    FileNew = Replace(filename, ".pdf", "excrypt.pdf")


    Dim stamper = New PdfStamper(reader, New FileStream(FileNew, FileMode.Create))

    stamper.SetEncryption(Nothing, Encoding.GetBytes(strPass), PdfWriter.AllowScreenReaders, PdfWriter.STRENGTH40BITS)

    stamper.Close()

    reader.Close()


    File.Delete(filename)

    File.Copy(FileNew, filename)

    File.Delete(FileNew)


    End Sub



    End Class

    ReplyDelete
  8. Thanks for the tip. I often use pdf to keep my copy on being duplicated. However, the printing option is always there. Now I can change it with your instruction. eco print

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  9. disabling pdf printing very easy i don't have idea of this before. SEO Company The Seo Portal

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  10. i am using crystal report to export to pdf and then put it into itextsharp to set permission for printing, copy, etc..
    but when i do that i get blank pdf pages. if i take out the setencryption line, it will display fine. can you show me why?
    Dim oStream As MemoryStream
    ' using System.IO
    oStream = DirectCast(UCRpt.ExportToStream(CrystalDecisions.Shared.ExportFormatType.PortableDocFormat), MemoryStream)
    Dim reader As New PdfReader(oStream.ToArray)
    Dim stamper = New PdfStamper(reader, oStream)
    Dim encoding As System.Text.UTF8Encoding = New System.Text.UTF8Encoding
    stamper.SetEncryption(Nothing, encoding.GetBytes("222"), PdfWriter.AllowScreenReaders, PdfWriter.STRENGTH40BITS)
    stamper.Close()
    reader.Close()


    Response.Clear()
    Response.Buffer = True
    Response.ContentType = "application/pdf"
    Response.BinaryWrite(oStream.ToArray())
    Response.Flush()
    Response.Close()
    Response.End()

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