The lack of a persistent state requires that the control??™s value be
set in the page??™s Load event if the desired value is different than what is set declaratively in the
78 CHAPTER 2 ?– ENCAPSULATING FUNCT IONALITY IN A SP.NET
page. In the next chapter, we discuss how to take advantage of state management in server
controls, but first, we provide a quick introduction to the new AJAX functionality first available
in ASP.NET 3.0 and enhanced in ASP.NET 3.5.
ASP.NET AJAX
ASP.NET AJAX 1.0 released after .NET Framework 2.0 as an officially supported product that
installs on top of .NET Framework 2.0. ASP.NET AJAX 1.0 provides a set of technologies to add
AJAX (Asynchronous JavaScript and XML) support to ASP.NET 2.0. It consists of a client-side
script framework and server controls, as well as the underlying plumbing for the AJAX functionality
with ASP.NET.
In addition to the ASP.NET AJAX 1.0 release, the ASP.NET AJAX Control Toolkit released as
a shared-source implementation built on top of the ASP.NET AJAX Extensions 1.0 core
functionality.
?– Note The ASP.NET AJAX Control Toolkit is not supported by Microsoft directly as a stand-alone product;
it is shipped as source code. This means that customers using the Control Toolkit can modify the source code
directly as well as seek help from the community and user forum resources.
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