In my previous article entitled Explorer Ways to extend ASP.NET AJAX Client-side Function,
we only, from the client side’s point of view, focused on adding the
client-side functionalities and behaviors to the current ASP.NET AJAX
framework. However, creating custom ASP.NET AJAX client-side components is a
language and may prefer to use server-side objects that can be manipulated
using VB.NET or C#. On the other hand, because server-side controls can output
client-side components. In this article we will explore ways to extend ASP.NET
AJAX client-side function from the server side.