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Chapter 7. Advanced Web Parts > Supporting AJAX

7.2. Supporting AJAX

As you probably know, Asynchronous JavaScript and XML (AJAX) defines a technique to cause a webpage to react dynamically in response to programmatic events or user input, letting you load or replace portions of a webpage by communicating with the Web server in the background using XML and asynchronous HTTP requests—without the need to reload the entire page.

In previous versions of SharePoint, you had to manually update your Web application’s web.config file and define some infrastructure controls in the page to enable AJAX support in SharePoint pages and Web Parts. Beginning with SharePoint 2010, however, SharePoint provides native support for ASP.NET AJAX. Now, to have an AJAX-enabled Web Part, you simply need to use the ASP.NET native controls, and everything will work seamlessly.


  

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