C# 4 and .NET 4

1104 ❘ ChaPTer 38 silverliGht
}
}
public bool RegisterAttendee(Attendee attendee)
{
using (EventRegistrationEntities data =
new EventRegistrationEntities())
{
if ((from rc in data.RegistrationCodes
where rc.RegistrationCode1 == attendee.RegistrationCode
select rc).Count() < 1)
{
return false;
}
else
{
data.Attendees.AddObject(attendee);
if (data.SaveChanges() == 1)
{
return true;
}
else
{
return false;
}
}
}
}
code snippet SilverlightDemos.Web/RegistrationService.svc.cs
The default BasicHttpBinding that is used with WCF hosting in the ASP.NET web application is okay for
use by Silverlight clients, and thus doesn ’ t need any confi guration. The only confi guration needed to make it
possible to add a service reference from Visual Studio is to allow the publishing of metadata with the HTTP
GET protocol as shown.
code snippet SilverlightDemos.Web/Web.config
Starting with Silverlight 3, it is possible to confi gure a binary encoding with the HTTP
transport. Silverlight 3 implements this encoding to allow for better performance. This
custom binding is used by default if you add a Silverlight-enabled WCF Service.
Calling WCf services
Before calling the service, a UI needs to be created. In the same Silverlight project as before, where the
animation was done, the Home.xaml page is changed to include ComboBox and TextBox controls to allow
entering information for an event and registering for the event. The design view of the application is shown
in Figure 38 - 5.
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