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However, its server-side processing model has several drawbacks inherent in the technology: Enter Microsoft's ASP. AJAX, which stands for A synchronous J ava Script A nd X ML, is an integrated framework for providing incremental page updates via cross-platform Java Script, composed of server-side code comprising the Microsoft AJAX Framework, and a script component called the Microsoft AJAX Script Library. NET AJAX extensions also provide cross-platform support for accessing ASP. This whitepaper examines the partial page updates functionality of the ASP.NET AJAX Extensions, which includes the Script Manager component, the Update Panel control, and the Update Progress control, and considers scenarios in which they should or should not be utilized.For example, if one Update Panel defines a Button control, and that Button control is clicked, all Update Panel controls on that page will be refreshed by default.
The following example uses an existing site and, Mozilla Firefox with the Firebug extension (Firebug captures XMLHttp Request data).There are many design considerations to take into account, based on the requirements of a specific project.(Click to view full-size image) (Click to view full-size image) In the original iteration of this application, a control was built that incorporated the entirety of the user registration data, including the postal code, city, and state.It then checks to see whether an error was reported, and if so, processes the details of it, finally indicating to the runtime that the error was handled in custom script.The Script Manager control provides extensive support for localization of script strings and user interface components; however, that topic is outside of the scope of this whitepaper.