InfoPath Dev

I'm trying to save a file using a unique filename and wanted to use epoch time (unless there's a better way).  Is there a function for epoch time?

Are you using code to call the save operation?

This is a C# expression to obtain the epoch time:

int epoch = (int)(DateTime.UtcNow - new DateTime(1970, 1, 1)).TotalSeconds;

I'm using a data connection and a rule on a button.  When the button is clicked, the rule fires calling the submit data connection sending the form to a SharePoint site.  Is there a way to use this code without signing the form?  If not, is there a function I can call in a rule to get epoch seconds?  Is there a better way for creating unique file names?

I use a combination of the username, the current time and some values from the form to create a meaningful and unique name

Dean