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);
Thanks this saved lots of time...
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Here is the code for VB.Net in pdf files exist
ReplyDeletePolicy: 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
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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ReplyDeletei am using crystal report to export to pdf and then put it into itextsharp to set permission for printing, copy, etc..
ReplyDeletebut 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()
I want to disable printing
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