How to use Ajax partial rendering in C#

This ASP.NET 4.0 tutorial explains how to use Ajax partial rendering in C#

Let start with a classical example – Web developer works under application which has a Web page with two drop-down lists. The first one contains all the cities in the country, and the second one contains the bank branches locations in the selected city. [...]

How AJAX works

This ASP.NET 4.0 tutorial explains how AJAX works.

Ajax is a client pattern and for that reason it is powered by JavaScript. Unfortunately, JavaScript can’t exchange information with the server and can only post the page to it. This limitation can be overcome by using the XMLHTTP component of Ajax. XMLHTTP enables invoking the server asynchronously without [...]

How AJAX improves usability

This ASP.NET 4.0 tutorial explains how AJAX improves usability.

Ajax is a pattern that combines JavaScript and XMLHTTP components to invoke the server asynchronously without causing a reload of the page. Before this technology, web applications had the following flow:
-The user requests a page
-The server replies with HTML interpreted by the browser
-The user performs an action [...]

How do I get the latest version of the ASP.NET AJAX Control Toolkit?

The the latest version with full source code and daily checkins of  ASP.NET AJAX Control Toolkit are available for viewing or downloading at CodePlex [...]