ABCpdf .NET PDF Component Documentation - XForm AddDocTimestamp Function. Adds a Signature field compatible with a DocTimeStamp.

AddDocTimestamp Function

Adds a Signature field compatible with a DocTimeStamp.

Syntax

[C#]
Signature AddDocTimestamp() Signature AddDocTimestamp(string name)

Params

Name	Description
name	The name of the document timestamp field. If no name is specified a unique name will be added.

Notes

Adds a Signature field compatible with a document timestamp.

Add an RFC 3161 compliant document timestamp field to the form.

To sign the timestamp you need to specify either a TimestampServiceUrl or a CustomSigner and then call Timestamp.

Example

See the Annotations example project for a full example.

However the following is a code snippet showing how this might be used.

using var doc = new Doc();
// ... set up the doc perhaps by reading a PDF
if (doc.PageCount == 0)
  doc.Page = doc.AddPage();
var sig = doc.Form.AddDocTimestamp("Timestamp");
var uri = new Uri("http://timestamp.digicert.com");
var oid = new Oid(CryptoConfig.MapNameToOID("SHA256"));
sig.TimestampServiceUrl = uri;
sig.Timestamp(oid, 0);