我一直在努力解决一个问题，也许你们能给我指出正确的方向。我正在尝试通过https连接在网络服务器上对pdf进行数字签名。在页面加载时我这样做:HttpClientCertificatecs=Request.ClientCertificate;X509Certificatecard=newX509Certificate(cs.Certificate);Org.BouncyCastle.X509.X509CertificateParsercp=newOrg.BouncyCastle.X509.X509CertificateParser();Org.BouncyCastle.X509.X50