Beginning Web Development, Silverlight, and ASP.NET AJAX

CHAPTER 13 ■ AJAX SCRIPTS AND SERVICES 329
If you specified that the properties could be writable, then you could save the properties
using the save method that is exposed by the Profile service. In a similar manner to
the load method you saw earlier, it takes four properties:
propertyNames: String array containing the names of profile properties to save; can
be null.
saveCompletedCallback: Callback function to call upon profile saving
failedCallback: Callback function to call upon failure of profile saving
userContext: String information to pass to the callback functions
Thus, you can specify how to save out your profile information using the following
code:
Sys.Services.ProfileService.properties.Property1 = document.form1.txtP1.value;
Sys.Services.ProfileService.properties.Property2 = document.form1.txtP2.value;
Sys.Services.ProfileService.save(null, OnProfileSaveCompleted, null, null);
Summary
In this chapter, you looked at how the AJAX extensions for ASP.NET handle scripts and
services. You looked at the ScriptManager component in some detail, looking at how to
handle partial page updates and errors in partial page updates, before moving on to
managing custom JavaScript libraries using the ScriptManager control. You then went
into some detail on accessing the web services using the ScriptManager and how Ajax
uses JavaScript Object Notation (JSON) to provide script-based proxies to web services.
Finally, you looked at ASP.NET authentication, membership, and profiling, and how the
AJAX extensions provide services that allow the JavaScript developer to access their information.
In the next chapter, you’ll see how the AJAX extensions beef up the JavaScript
developer’s toolbox through object-oriented extensions and more.