Background This article continues my previous one, to add watermark in PDF files, now we will go ahead and look how to add password in PDF File. Please check Add WaterMark In PDF Files. The code Code: Imports System Imports System.IO Imports iTextSharp.text Imports iTextSharp.text.pdf Public Class Form1 Inherits System.Windows.Forms.Form Private Sub brnOpen_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles brnOpen.Click Dim FldBrow As OpenFileDialog = New OpenFileDialog() FldBrow.Title = "Select PDF File To Add WaterMark" FldBrow.InitialDirectory = "c:\" FldBrow.Filter = "PDF Files (*.pdf)|*.pdf" FldBrow.FilterIndex = 2 FldBrow.RestoreDirectory = True If FldBrow.ShowDialog() = Windows.Forms.DialogResult.OK Then txtPath.Text = FldBrow.FileName End If End Sub Private Sub breimgopen_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles breimgopen.Click MessageBox.Show(txtpass.Text) End Sub Private Sub btnoutput_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnoutput.Click Dim sfd1 As SaveFileDialog = New SaveFileDialog() sfd1.Title = "Save Output File" sfd1.InitialDirectory = "c:\" sfd1.Filter = "PDF files (*.pdf)|*.pdf" sfd1.FilterIndex = 2 sfd1.RestoreDirectory = True If sfd1.ShowDialog() = Windows.Forms.DialogResult.OK Then txtoutpath.Text = sfd1.FileName End If End Sub Private Sub btnexit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnexit.Click End End Sub Private Sub btnAddWaterMark_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAddWaterMark.Click Dim input As String = "" Dim output As String = "" Dim password As String = "" input = txtPath.Text password = txtpass.Text output = txtoutpath.Text AddPasswordToPDF(input, output, password) End Sub Private Sub AddPasswordToPDF(ByVal sourceFile As String, ByVal outputFile As String, ByVal password As String) Dim pReader As PdfReader = New PdfReader(sourceFile) PdfEncryptor.Encrypt(pReader, New FileStream(outputFile, FileMode.Open), PdfWriter.STRENGTH128BITS, password, Nothing, PdfWriter.AllowScreenReaders) End Sub End Class
Re: Add Password in PDF File in C#.net sir really ... this adding password to pdf works and i wrote in C#.net it really works... awesome yaar... sir can u tell me if before encryption the pdf is encrypted then wat to do becoz the pdfencrypter gives error... sir please , if more u can tell abt all this and more
Re: Add Password in PDF File in C#.net C#.net code as below Code: private void btnopen_Click(object sender, EventArgs e) { OpenFileDialog FldBrow = new OpenFileDialog(); FldBrow.Title = "Select PDF To Add Password"; FldBrow.InitialDirectory="c:\\"; FldBrow.Filter = "PDF Files (*.pdf)|*.pdf"; FldBrow.FilterIndex = 2; FldBrow.RestoreDirectory=true; if(FldBrow.ShowDialog() == System.Windows.Forms.DialogResult.OK) textBox1.Text=FldBrow.FileName; } private void Save_Click(object sender, EventArgs e) { SaveFileDialog sfd1=new SaveFileDialog(); sfd1.Title = "Save Output File"; sfd1.InitialDirectory = "My Documents\\"; sfd1.Filter = "PDF files (*.pdf)|*.pdf"; sfd1.FilterIndex = 2; sfd1.RestoreDirectory = true; if(sfd1.ShowDialog()==System.Windows.Forms.DialogResult.OK) textBox2.Text=sfd1.FileName; } private void addpwd_Click(object sender, EventArgs e) { string input = ""; string output = ""; string password = ""; input = textBox1.Text; output = textBox2.Text; password = txtpass.Text; Add_pwd_to_pdf(input, output, password); } private void Add_pwd_to_pdf(string input, string output, string password) { //string ownpwd = "123"; PdfReader preader = new PdfReader(input); PdfEncryptor.Encrypt(preader, new FileStream(output, FileMode.Append), PdfWriter.STRENGTH128BITS, password,"",PdfWriter.ALLOW_SCREENREADERS); }
Thank you for sharing us the code library to add password in pdf file, although I am not familiar with this way, last time i needed to add password to pdf which is already existed. I know Acrobat may be the right stuff to achieve this. But I don't want to pay for it for this tiny problem. Try free or lower price tool to add password to pdf or use the JavaScript method is ideal way for me.
Hello i follow the example about Add Password in PDF File but i have a problem: When i run AddPasswordToPDF(input, output, password) return access denied in c:\pdf My S.O. is Windows 7, i tried to set all permitions and i disabled Uac but not function. I tried also to change directory and disk but nothing. Please help me. Tanks