Building Interactive User Interfaces with Microsoft ASP.NET AJAX: Performing Client Actions in Response to Partial Page Postbacks

Posted by: 4GuysFromRolla.com Headlines, on 28 May 2008 | View original | Bookmarked: 0 time(s)

The previous three articles in this series focused on building AJAX-enabled web applications using server-side techniques and controls. For instance, Using the UpdatePanel examined how to define regions on the page that participate and are updated by partial page postbacks; Providing Visual Feedback with the UpdateProgress Control showed how to use the UpdateProgress control to display feedback during a long-running partial page postback.

The ASP.NET AJAX Framework also includes a rich client-side library and event model that enables page developers to create and execute client script and event handlers that integrate with the ASP.NET AJAX Framework. This article starts our examination of client-side development with the ASP.NET AJAX Framework. In particular, it examines the client-side PageRequestManager object, which includes methods and events tied to the partial page postback mechanism. In a nutshell, we can use the PageRequestManager object to execute client-side script immediately before or after a partial page postback.

This article discusses the basics of the client-side PageRequestManager object and includes examples that show how to abort and cancel partial page postbacks as well as how to scroll to a particular location on screen after a partial page postback completes. These working demos are available for download at the end of this article. Read on to learn more!
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