How to determine if a pdf document is password protected using aspose.pdf, C#, DotNet

Detect encrypted Pdf document using C#, DotNet, Aspose.pdf

#region "Description"

/*       

 Method given in blog can be used to determine if a pdf document is password protected or not

1)    Add reference to Aspose.Pdf dll in your project

2)  Add reference to Aspose.Pdf namespace in your class

 e.g.( using Aspose.Pdf; )

2)    Copy  isPasswordProtectedPDFDoc() method in your class

 Aspose.Pdf Reference: http://www.aspose.com/.net/total-component.aspx

 

*/      

#endregion

#region "Method"

public bool isPasswordProtectedPDFDoc(Stream fileDataStream)

{

    bool isPasswordProtected = false;

    try

    {

        Aspose.Pdf.Facades.PdfFileInfo fileInfo = new Aspose.Pdf.Facades.PdfFileInfo(fileDataStream);

        if (fileInfo.IsEncrypted)

            isPasswordProtected = true;

        Aspose.Pdf.Document doccurrept = new Aspose.Pdf.Document(fileDataStream);

    }

    catch (Aspose.Pdf.Exceptions.InvalidPasswordException)

    {

        isPasswordProtected = true;

    }

    catch (Exception exc)

    {

        //objfileprops.iscorrupted = true;

    }       

    return isPasswordProtected;

}

#endregion