Beginning ASP.NET 4.5 in CSharp and VB Opsylum

Chapter 10 x 777
CHAPTER 10
Exercise 1 Solution
The ScriptManager control is a required component in almost all Ajax-related operations. It takes
care of registering client-side JavaScript files, handles interaction with web services defined in your
website, and it’s responsible for the partial page updates. You usually place the ScriptManager
directly in a content page if you think you need Ajax capabilities on only a handful of pages.
However, you can also place the ScriptManager in a master page so it becomes available throughout
the entire site.
When you have the ScriptManager in the master page you can use the ScriptManagerProxy to
register individual web services or script files on content pages. Because you can have only one
ScriptManager in a page, you can’t add another one in a content page that uses your master page
with the ScriptManager. The ScriptManagerProxy serves as a bridge between the content page
and the ScriptManager, giving you great flexibility as to where you register your services.
Exercise 2 Solution
You can let your users know a partial page update is in progress by adding an UpdateProgress control
to the page. You connect this control to an UpdatePanel using its AssociatedUpdatePanelID.
Inside the you define whatever markup you see fit to inform your user
an update is in progress. A typical contains an animated icon, some text,
or both.
Exercise 3 Solution
To create a script-callable service, you first need to add an AJAX-enabled WCF service file to
your site using the Add New Item dialog box. The class file that is created for you already has the
ServiceContract and AspNetCompatibilityRequirements attributes applied.
VB.NET
Public Class NameOfYourService
C#
[ServiceContract(Namespace = "")]
[AspNetCompatibilityRequirements(
RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
public class NameOfYourService
You then need to decorate each method within this class that you want exposed as a web method
with the OperationContract attribute: