SignerAddTimestamp Method

Add a document time-stamp

This type of signature provides evidence that the document existed at a specific time and protects the document’s integrity.

The features and format of the signature are defined by the Provider and the configuration.

Non-critical processing errors raise a Warning. It is recommended to review the WarningCategory and handle them if necessary for the application.

Namespace: PdfTools.Sign
Assembly: PdfTools (in PdfTools.dll) Version: 1.0.0

Syntax

public Document AddTimestamp(
	Document document,
	TimestampConfiguration configuration,
	Stream stream,
	OutputOptions outputOptions = null
)

document Document: The input document to add a time-stamp to
configuration TimestampConfiguration: The time-stamp configuration
stream Stream: The stream where the output document is written
outputOptions OutputOptions (Optional): Document-level output options not directly related to the document time-stamp

Exceptions

Exception	Condition
LicenseException	The license check has failed.
IOException	Writing to the stream failed.
UnsupportedFeatureException	The input PDF contains unrendered XFA form fields. See Xfa for more information on how to detect and handle XFA documents.
ArgumentException	If the configuration is invalid, e.g. because the creating provider has been closed.
NotFoundException	If the FieldName does not exist in document.
RetryException	If an unexpected error occurs that can be resolved by retrying the operation. For example, if a signature service returns an unexpectedly large signature.
RetryException	If a resource required by the cryptographic provider is temporarily unavailable.
HttpException	If a network error occurs, e.g. downloading revocation information (OCSP, CRL) or a time-stamp.
UnsupportedFeatureException	If the cryptographic provider does not support the requested signing algorithm.
PermissionException	If the cryptographic provider does not allow the signing operation.
ArgumentNullException	if document is .
ArgumentNullException	if configuration is .
ArgumentNullException	if stream is .