How to Auto-Generating Filenames for InfoPath Forms in SharePoint 2013 Form Library?

I have created a Form Library in SharePoint 2013 When I create new Item in this library it ask me for name.

I need a way to generate that name dynamically

I searched the net found a blog: http://claytoncobb.com/2009/06/20/auto-generating-filenames-for-infopath-forms/

but this blog did it for SharePoint 2007 or 2010 and InfoPath 2007 and InfoPath 2010 not for SharePoint 2013 and InfoPath 2013 How can I generate file name dynamically in the form library in SharePoint 2013