Call (Consume) JSON Generic HTTP Handler (ASHX) using jQuery AJAX in ASP.Net

Here Mudassar Ahmed Khan has explained with an example, how to Call (Consume) JSON Generic HTTP Handler (ASHX) on Client Side using jQuery AJAX in ASP.Net. When the JSON Generic HTTP Handler will be called using jQuery AJAX, it will pull records from database and return the records in JSON format to jQuery AJAX function.