PROSAGA码农传奇-数字签名-无法打印数字签名

无法打印数字签名

作者: 仙风道骨刘憨憨
发布时间: 2024-03-27 11:28:36 (23天前)
转自：

<div class =“post-text”itemprop =“text”>
  <P>
    尝试在启动PdfSignatureHandler之前打印文本它对我来说很好。
  </p>
   <pre>
    <code>
       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);
    }

</code>
  </pre>
</DIV>