PdfDocumentSignature Class

The PdfDocumentSignature class represents the data needed for applying a digital signature to an existing SignatureWidgetAnnotation object in a PdfDocument. This means that the SignatureWidgetAnnotation must already exist in the PagesOfAnnotations property in the PdfDocumentSigner either because it was pre-existing in the original document or that the document allowed it to be added.

public class PdfDocumentSignature : BaseSignature

Public Class PdfDocumentSignature
	Inherits BaseSignature

public void SignDoc(PdfDocumentSigner signer, SignatureWidgetAnnotation annot, CmsInformation cmsInfo)
{
    PdfDocumentSignature signature = new PdfDocumentSignature(cmsInfo, signature, true, true);
    signer.SignAndSave(new PdfDocumentSignature[] { signature } );
}