WCF Callback doesn't fire

Question

I have a WCF Service with a Callback. Then i call a Callbackfunction everything works great except: Then i try to pass a List the Callback isn't called but also there is no Exception thrown. The Callback object is working since everything else works fine, i can also push the same class object as the one in the List. The Class object is declared as a [DataContract] and the Properties as [DataMember]. I also looped through the List, it is normaly generated by the Entity Framework.

    //IService
    [ServiceContract(CallbackContract = typeof(ICallbackService))]
    public interface IService
    {
        [OperationContract]
        void Login(string username, string password);

        [OperationContract]
        void RequestCards(Guid sessionID);
    }

    //Service
    public void RequestList(Guid sessinID)
    {
        User user = Users.FirstOrDefault(x => x.ID == sessinID);
        if (user != null)
        {
            user.Callback.PushList(DBCtx.GetAllEntitys());
        }
    }

    //ICallbackService
    public interface ICallbackService
    {
        [OperationContract]
        void LoginResult(Guid sessionID);

        [OperationContract]
        void PushList(List<Card> entitys);
    }

Simon Houlton · Accepted Answer · 2016-01-04T14:50:58.927

0

I'd add this as a comment but unfortunately I don't have enough points thingy. Would you be able to put tracing on your request and see if there's an exception happening that isn't exposing itself in the outer layers.

MSDN

edited Jan 04 '16 at 14:50

answered Jan 04 '16 at 14:33

Simon Houlton

182
1
10

Thanks a lot. Helped finding the actual problem. I passed the derived class expect for the base class, wich for no reason didn't throw a exception. – Alexander Grasberger Jan 04 '16 at 15:09

WCF Callback doesn't fire

1 Answers1