♣ From .net 2.0 onwards AJAX is supporting by .net technology
♣ In .net 2.0 AJAX software is not integrated, due to that reason in ASP.Net 2.0, if you want to use AJAX, we have to install AJAX software explicitly
♣ From .net 3.5 onwards AJAX is integrated with .net software, that means from ASP.Net 3.5 if you want to use AJAX we don’t require to install AJAX software explicitly but we have to add AJAX tool kit to ASP.Net toolbox window, this tool kit is a free download which is available with in the below website
♣ AJAX will support two programming models
1. Server Centric Programming Model
2. Client Centric Programming Model
Server Centric Programming Model :
♣ In server centric model every client request is processing by the web server. That means first request as well as post back requests are processing by the web server only
Client Centric Programming Model :
♣ In client centric model first request will be processing by the web server and post back requests are processing by the client
♣ While developing the AJAX web page, we can use server centric programming model or client centric programming model or both programming models we can use in a single web page