Set Passwords and Permissions for PDF - VB.NET
PDF SDK sample in VB.NET demonstrating ‘Set Passwords and Permissions for PDF’
Program.vb
Imports Bytescout.PDF
''' <summary>
''' This example demonstrates how to lock the document with a password.
''' PDF format supports two kinds of passwords: owner and user password.
''' User password allows to view document and perform allowed actions.
''' Owner password allows everything, including changing passwords and permissions.
''' </summary>
Class Program
Shared Sub Main()
' Create new document
Dim pdfDocument = New Document()
pdfDocument.RegistrationName = "demo"
pdfDocument.RegistrationKey = "demo"
' If you wish to load an existing document uncomment the line below And comment the Add page section instead
' pdfDocument.Load(".\existing_document.pdf")
' Add page
pdfDocument.Pages.Add(New Page(PaperFormat.A4))
' Set document encryption algorythm
pdfDocument.Security.EncryptionAlgorithm = EncryptionAlgorithm.RC4_40bit
' Set various user permissions
pdfDocument.Security.AllowPrintDocument = False
pdfDocument.Security.AllowContentExtraction = False
pdfDocument.Security.AllowModifyAnnotations = False
pdfDocument.Security.PrintQuality = PrintQuality.LowResolution
' Set owner password
pdfDocument.Security.OwnerPassword = "ownerpassword"
' Set user password
pdfDocument.Security.UserPassword = "userpassword"
' Save document to file
pdfDocument.Save("result.pdf")
' Cleanup
pdfDocument.Dispose()
' Open document in default PDF viewer app
Process.Start("result.pdf")
End Sub
End Class
Resources.Designer.vb
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