How to update date base after closing the browser?

When the user closes the browser, onbeforeunload event fires on the client side. Add a java script function to that event, have web service call to perform your business logic.

 

Here are few references: 

There is no reliable way to do this one. You will get some good points in the below thread:

 

https://forums.asp.net/t/2069948.aspx