Last month I did a presentation at SDDN in Melbourne on RIA Services and it’s in built authentication and validation features.
The code is posted here:
The talk started off by running through the UserDTO object – under Services/DomainObjects. This object is exposed through the UserRegistrationService under /Services.
Next you’ll want to familiarise with the LoginManager in the Silverlight project (under Model/LoginManager.cs).
I then added some custom validation to the UserDTO object.
Next I created a UserValitator.shared.cs file under Services/DomainObjects and applied a metadata attribute to UserDTO to connect the two. .shared.cs files will be automatically made available to Silverlight by RIA Services.
The login stuff is built using the standard ASP.NET membership SQL provider, and the built in RIA Services abilities around this.
Read through LoginManager.cs see how the forms authentication object is created, and how the system uses the AuthenciationDomainContext, which is created on the sever in Services/DomainObjects. AuthenticationDomainService on the server contains the goods to validate a user and also provides a User class, which you can extend.
There is also a UserRegistration context in LoginManager which allows you to create a new user. See UserRegistrationService.cs on the server (under Services/DomainObjects) to see how this works (by using the MembershipHelper class).
See the Web.config to note how the system is configured to use the SQL connection, and in the membership section note that it is configured to use this same SQL connection.
You’ll need to configure your SQL database as well – to create the ASP.NET membership tables… run aspnet_regsql.exe (in C:\Windows\Microsoft.NET\Framework\v2.0.50727) from an elevated prompt to start the wizard.
This should be enough to get you started.
BTW, there is some great doco on this in the .NET RIA Services PDF file…