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MSDN Library

SignatureObject interface

Represents a digital signature that has been added to a form or set of signed data in a form.

Namespace:  Microsoft.Office.Interop.InfoPath
Assembly:  Microsoft.Office.Interop.InfoPath (in Microsoft.Office.Interop.InfoPath.dll)

[GuidAttribute("096CD718-0786-11D1-95FA-0080C78EE3BB")]
public interface SignatureObject : Signature

This type is a wrapper for a coclass that is required by managed code for COM interoperability. Use this type to access the members of the COM interface implemented by this coclass. For information about the COM interface, including a link to descriptions of its members, seeSignature.

Use the Item property of the SignaturesCollection collection to return a Signature object.

In the following example, the Status property of the Signature object is used to determine the status of the signature, and several Signature object properties are displayed in message boxes:

public void DisplaySignatureProperties()
{
SignatureObject mySignature = thisXDocument.SignedDataBlocks[0].Signatures[0];
CertificateObject signatureCertificate = mySignature.Certificate;
string signatureComment = mySignature.Comment;
IXMLDOMNode signatureNode = mySignature.SignatureBlockXmlNode;
string signatureStatus = "Unknown";
switch(mySignature.Status)
{
 case XdSignatureStatus.xdSignatureStatusValid : 
  signatureStatus = "Valid";
  break;
 case XdSignatureStatus.xdSignatureStatusInvalid : 
  signatureStatus = "Invalid";
  break;
 case XdSignatureStatus.xdSignatureStatusError :
  signatureStatus = "Error";
  break;
 case XdSignatureStatus.xdSignatureStatusUnsupported :
  signatureStatus = "Unsupported";
  break;
}
thisXDocument.UI.Alert("Signature properties:\n Status = " + signatureStatus + "\n Comment = " + signatureComment + "\n Certificate Issued To = " + signatureCertificate.IssuedTo);
thisXDocument.UI.Alert("Digital signature XML block: \n" + signatureNode.xml);
}
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