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Adding AJAX and Client Capabilities Roadmap
You can enhance the server-based features of ASP.NET by including client-script functionality in ASP.NET Web pages. You can use client script to provide a richer, more responsive user interface to users. You can also use client script to make asynchronous calls to the Web server while a page is running in the browser.
ASP.NET provides two approaches for including client capabilities. The first approach is to use the AJAX features of ASP.NET. ASP.NET AJAX includes a library of client script functions that bring many of the advantages of object-oriented programming and of the ASP.NET model to client scripting. ASP.NET AJAX also provides server-based support that includes Web server controls that can automatically render client script that is required for AJAX functionality.
The second approach is to create client script and integrate it yourself into ASP.NET Web pages. This approach is useful if you have only small pieces of client script or if you want to integrate existing client script into your application. This approach is used by many ASP.NET Web server controls (for example, the validator controls) to add client functionality.
The documentation for AJAX features in ASP.NET includes overviews, tutorials, and API reference topics. We suggest you start with the topics under "Getting started" and then following the progression of topics down the table.
ASP.NET AJAX Client Reference
ASP.NET AJAX Server Controls Reference
The following .NET Framework APIs support ASP.NET AJAX server controls:
Using ASP.NET AJAX server controls
Client scripting with ASP.NET AJAX
Debugging and tracing
Calling Web services and WCF services
Localizing and globalizing applications
Extending ASP.NET AJAX
The following topics provide information about how to create client script yourself that enhances the functionality of Web pages and server controls.
Getting started with client scripting
Client scripting with server controls
Dynamic client scripting and script references
Calling back to client code without server postback