
In the second part of this series, you saw how to create client Controls and Extenders using the Microsoft Ajax Library and the ASP.NET AJAX server framework. Now, you will learn how to make asynchronous calls to the server in order to process data without reloading a web page.The Web uses a stateless protocol (HTTP) to exchange data. As a consequence, a user interacts with a web page through multiple request-response transactions. Typically, an action performed by the user (such as submitting a form, or clicking a hyperlink) results in the browser requesting a web page from the server. Therefore, the state of a web application is reloaded a..
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