checking if pdf is password protected using itextsharp

Question

I want to check if a pdf file is password protected or not to view. That is i want to know if the pdf file has user password or not.

I found some help in some forum

Answer 1

Reference : Check for Full Permission

You should be able to just check the property PdfReader.IsOpenedWithFullPermissions.

PdfReader r = new PdfReader("YourFile.pdf");
if (r.IsOpenedWithFullPermissions)
{
    //Do something
}