GrapeCity.Documents.Excel.ISignature.Countersign

Countersign Method

Countersign(X509Certificate2)

Countersign the signature, if the signature has been signed.

Declaration

void Countersign(X509Certificate2 certificate)

Sub Countersign(certificate As X509Certificate2)

Parameters

Type	Name	Description
X509Certificate2	certificate	The certificate that will be used to countersign this signature.

Examples

workbook.Open(GetSignedWorkbookStream());
ISignature signature = workbook.Signatures[0];
X509Certificate2 certificate = GetSigningCertificate();
signature.Countersign(certificate);

Exceptions

Type	Condition
InvalidOperationException	The signature has not been signed.