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Beginning Ajax with ASP.NET- P11

Beginning Ajax with ASP.NET- P11:Thank you for purchasing Beginning Ajax with ASP.NET. We know that you have a lot of options when selecting a programming book and are glad that you have chosen ours. We’re sure you will be pleased with the relevant content and high quality you have come to expect from the Wrox Press line of books. | Chapter 5 Summary In this chapter you examined several topics related to data communication. XML XML contains the raw data of a data transfer. It is human- and computer-readable in a language-independent format. XSLT XSLT is used to transform information from one XML format into another. X Path X Path is used to navigate within an XML XSLT document. JSON JSON is a human- and computer-readable data interchange format that is less complex then XML. These topics form an important basis for heterogeneous communications such as that used in Ajax and between a web client and a web server. Knowing how XML XSLT and JSON are structured can be very valuable as a basis of a custom Ajax library for getting data between a web client and a web server or for being able to diagnose a problem in an existing library. You can find more on the topics discussed in this chapter at the following sites Wikipedia http en.wikipedia.org wiki XML SGML Source by Charles F. Goldfarb www.sgmlsource.com World Wide Web Consortium W3C www.w3c.org W3 Schools web site www.w3schools.org JSON web site www.crockford.com JSON 126 6 What Is Built into ASP.NET ASP.NET 2.0 contains an incredible amount of enhancements over ASP.NET 1.0 and 1.1. The ASP.NET team has attempted to address various areas that required improvement in previous versions and the inclusion of Ajax-style functionality is one of those areas. ASP.NET 2.0 contains a technology called Asynchronous Client Script Callbacks or simply callbacks for a shortened name. As the name suggests this offers the ability for ASP.NET to directly support the inclusion of JavaScript code that enables asynchronous calls to the server for processing that is to execute a server method asynchronously from within the browser and have ASP.NET instruct the browser to execute a JavaScript callback method when the server method completes. In this chapter you take a look at Server controls included with ASP.NET V2.0 that support asynchronous callback functionality .