SignEvent Object

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InfoPath Developer Reference

An event object that is used during the OnSign event.

Version Information
 Version Added:  InfoPath 2003

Remarks

Use the SignedDataBlock property of the SignEventObject object to determine which signed data block is triggering the OnSign event. The OnSign event is raised for a fully trusted form template only.

Example

In the following example, the SignEvent object is used to add a signature and timestamp to a SignedDataBlock object:

JScript 
  [InfoPathEventHandler(EventType=InfoPathEventType.OnSign)]
public void OnSign(SignEvent e)
{
    Signature signature = e.SignedDataBlock.Signatures.Create();
	   signature.Sign();

   // Countersign the signature with a trusted timestamp.

   // Get the XML node storing the signature block.
   IXMLDOMNode oNodeSig = signature.SignatureBlockXmlNode;
   IXMLDOMNode oNodeSigValue = oNodeSig.selectSingleNode(".//*[local-name(.)=’signatureValue’]");
   // Get time stamp from timestamp service (fictitious).
   MyTrustedTimeStampingService s = new MyTrustedTimeStampingService();
   string strVerifiedTimeStamp = s.AddTimeStamp(oNodeSigValue.text);

   //Add the value returned from the timestamping service to the 
   //unsigned part of the signature block.
IXMLDOMNode oNodeObj = oNodeSig.selectSingleNode(".//*[local-name(.)=’Object’]");
   IXMLDOMNode oNode = oNodeObj.cloneNode(false);
   oNode.text = strVerifiedTimeStamp;
   oNodeObj.parentNode.appendChild(oNode);

   e.ReturnStatus = true;



}

See Also