October 2010
Intermediate to advanced
1920 pages
73h 55m
English
Content preview from ASP.NET 4 Unleashed
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Calling Web Services from the Client
The heart of Ajax is the capability to send and retrieve information from the web server without needing to post back a page to the web server. Ajax is all about performing “sneaky” postbacks.
The vision behind a pure Ajax application is that it should consist of a single page. All updates to the single page after it has been loaded should be performed by calling web services. You should never need to perform a postback because any postback results in a bad user experience. (The page jumps and the universe freezes.)
The jQuery library provides support for calling web services directly from the client (the web browser) with a built-in function called $.ajax. In this section, you learn two methods of exposing ...