VB.Net code to check if password is pdf protected

Question

Hi Team,

I am new to VB.Net can you please help with the sample code to check if the pdf file is password protected. If it is password protected move the file to the backup folder.

Thanks in Advance

Regards,
Pavan K

Rajanikant Hawaldar · Answer

Below code is using iTextsharp api. It has many properties to check you can use as your need and saving to backup folder task can be done esily if you can google Private Sub CheckPdfProtection( ByVal filePath As String ) Try Dim reader As PdfReader = New PdfReader(filePath) If Not reader.IsEncrypted() Then Return If Not PdfEncryptor.IsPrintingAllowed(reader.Permissions) Then Throw New InvalidOperationException( "the selected file is print protected and cannot be imported" ) If Not PdfEncryptor.IsModifyContentsAllowed(reader.Permissions) Then Throw New InvalidOperationException( "the selected file is write protected and cannot be imported" ) Catch __unusedBadPasswordException1__ As BadPasswordException Throw New InvalidOperationException( "the selected file is password protected and cannot be imported" ) Catch __unusedBadPdfFormatException2__ As BadPdfFormatException Throw New InvalidDataException( "the selected file is having invalid format and cannot be imported" ) End Try End Sub

Sachin Singh · Answer

use spire.doc , its easy to use. https://www.e-iceblue.com/Tutorials/Spire.PDF/Spire.PDF-Program-Guide/Security/How-to-detect-if-a-PDF-document-is-password-protected-in-C-VB.NET.html