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    <p>If you create a "Silverlight Business Application" you'll see how the template implements authentication. (Or just go <a href="http://blogs.msdn.com/brada/archive/2009/07/10/amazing-business-apps-example-updated-for-silverlight-3-rtm-and-net-ria-services-july-update.aspx" rel="noreferrer">here and download the template sample project</a>.)</p> <p>To simplify, here's the process I used:</p> <p>First, I create a domain service (FooService) that derives from LinqToEntitiesDomainService where FooContext is my entity model. In it I add all the CRUD operations to access my custom DB table and return user profiles.</p> <p>Next, create a concrete User class on the serverside by deriving from UserBase:</p> <pre><code>using System.Web.Ria; using System.Web.Ria.ApplicationServices; public class User : UserBase {} </code></pre> <p>Finally, derive a class from AuthenticationBase and implement the following four methods:</p> <pre><code>[EnableClientAccess] public class AuthenticationService : AuthenticationBase&lt;User&gt; { private FooService _service = new FooService(); protected override bool ValidateUser(string username, string password) { // Code here that tests only if the password is valid for the given // username using your custom DB calls via the domain service you // implemented above } protected override User GetAuthenticatedUser(IPrincipal pricipal) { // principal.Identity.Name will be the username for the user // you're trying to authenticate. Here's one way to implement // this: User user = null; if (this._service.DoesUserExist(principal.Identity.Name)) // DoesUserExist() is a call // added in my domain service { // UserProfile is an entity in my DB UserProfile profile = this._service.GetUserProfile(principal.Identity.Name); user.Name = profile.UserName; user.AuthenticationType = principal.Identity.AuthenticationType; } return user; } public override void Initialize(DomainServiceContext context) { this._service.Initialize(context); base.Initialize(context); } protected override void Dispose(bool disposing) { if (disposing) this._service.Dispose(); base.Dispose(disposing); } } </code></pre>
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    1. PORIA Services: How can I create custom authentication?
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    1. USNick Gotch
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    1. COThanks, that's what I was looking. Cheers
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      1. USCharles
    2. CO*looking for*... My butter fingers and I wouldn't mind an Edit option for comments...
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    3. COPlease could you explain this answer in a bit more detail? I'm really struggling to implement just normal authentication and I can't find any good sources of information that aren't totally ambiguous and assume knowledge already. I would really appreciate some help.
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