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

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.

Here Mudassar Ahmed Khan has explained with an example, how to call (execute) Generic HTTP Handler from Code Behind using C# and VB.Net in ASP.Net.

Here Mudassar Ahmed Khan has explained with an example, how to return JSON data from a Generic Handler in ASP.Net using C# and VB.Net.
The Generic HTTP Handler will pull records from database and return the records in JSON format to the client.