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Custom IPrincipal/IIdentity?

Printed From: IdeaBlade
Category: DevForce
Forum Name: DevForce 2009
Forum Discription: For .NET 3.5
URL: http://www.ideablade.com/forum/forum_posts.asp?TID=1707
Printed Date: 08-Nov-2025 at 5:18am


Topic: Custom IPrincipal/IIdentity?
Posted By: ahopper
Subject: Custom IPrincipal/IIdentity?
Date Posted: 07-Apr-2010 at 8:03am
We are using DevForce 9 with Silverlight clients, and we'd like some custom data to travel with the user information; however, when we try to create a LoginManager that returns our custom principal, we're getting what appear to be serialization errors griping about the datacontract serializer not being aware of the type. Unfortunately, I have no way to add that attribute to whatever class is being serialized as it is inside the compiled DevForce assemblies. Is there a way to make the serializer aware of our types?


Replies:
Posted By: ting
Date Posted: 07-Apr-2010 at 5:21pm
On your custom class did you do the following?:
  1. Mark your class with the [DataContract] attribute.
  2. Mark your class with the [DiscoverableType(DiscoverableTypeMode.KnownType)] attribute OR have your class implement IKnownType (a marker interface).
  3. Have each serializable property in the class marked with the [DataMember] attribute.

Posted By: ahopper
Date Posted: 08-Apr-2010 at 2:39pm
Ah, that did the trick. Many thanks.

Posted By: ting
Date Posted: 09-Apr-2010 at 3:34pm
Cool!  Glad I could help.


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