Hi Ravi
Unfortunately, there's a problem with downloading the screen shot. Since you tagged your post with a Traditional Web tag, I assume you're indeed using traditional web. If you add an Upload widget to the Screen, any Screen action of that Screen has access to it's properties, amongst which are Content, Type and Filename:
The page you linked to, and which mentions Filecontent and Filename, starts with the explenation for Reactive Web and Mobile. For Traditional, you need to scroll down:
