Trouble printing Digital Signature - pdfsharp

Question

I have created a pdf document using ModelDoc. After creating it, I am using PDFSharp to insert a digital signature in the document.
The digital signature is seen properly and I am also able to perform normal task of signature validation.
However, the digital signature is not printed when I print the document. I have already tried using "Document and markup" and "Document and stamps".
However, the signature is still not being printed. Here is the code for digital signature.
void ISignatureAppearanceHandler.DrawAppearance(XGraphics gfx, XRect rect)
{
string signtext = "This is a digital signature";
XFont font = new XFont("Verdana", 8.0, XFontStyle.Regular);
XPoint xPoint = new XPoint(0.0, 0.0);
gfx.DrawRectangle(
XBrushes.LightBlue, xPoint.X,
xPoint.Y, rect.Width, rect.Height
);
XTextFormatter xTextFormatter = new XTextFormatter(gfx);
xTextFormatter.DrawString(
signtext, font,
new XSolidBrush(
XColor.FromKnownColor(XKnownColor.Black)
),
new XRect(
xPoint.X, xPoint.Y, rect.Width, rect.Height
),
XStringFormats.TopLeft
);
}

Answer 1

Try Printing your text before initiating PdfSignatureHandler it worked fine for me.
private static void SignExisting()
{
double height = 40;
double width = 200;
double x = 0;
double y = 0;
PdfDocument pdfDocument = PdfReader.Open(path);
PdfPage pp = pdfDocument.Pages[0];
var cert = GetCertificate();
string signtext = "Digitaly Signed by " + cert.GetNameInfo(X509NameType.SimpleName, false);
XGraphics gfx = XGraphics.FromPdfPage(pp);
XFont font = new XFont("Arial", 10, XFontStyle.Regular);
gfx.DrawString(signtext, font, XBrushes.Black, new XRect(x, pp.Height - y, pp.Width, pp.Height), XStringFormats.TopLeft);
gfx.DrawString("Date: " + DateTime.Now.ToString(), font, XBrushes.Black, new XRect(x, pp.Height - y, pp.Width, pp.Height), XStringFormats.TopLeft);
PdfSignatureOptions options = new PdfSignatureOptions
{
ContactInfo = cert.GetNameInfo(X509NameType.SimpleName, false),
Location = cert.Subject,
Reason = "",
Rectangle = new XRect(x, y, width, height),
AppearanceHandler = new SignAppearenceHandler()
};
PdfSignatureHandler pdfSignatureHandler = new PdfSignatureHandler(cert, null, options);
pdfSignatureHandler.AttachToDocument(pdfDocument);
Stream stream = new MemoryStream();
pdfDocument.Save(stream);
}