Hello. I am using NHibernate 1.2 Alpha.

I am using ISet<T> lists on my data objects.

I have made a webservice that returns one of this objects and the result is:

Cannot serialize member IriSceneRemoteManager.DataModel.IrmTerminal.Groups of type Iesi.Collections.Generic.ISet`1[[IriSceneRemoteManager.DataModel.IrmTerminalGroup, DataModel, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]] because it is an interface

Is there a way to exchange NHibernate objects between webservice server/clients?

I tried doing the same thing with an IList<T> and ran into the same problem. The solution for me was to use the non-generic IList instead. For whatever reason, the generic version doesn't work but the non-generic version does. I've never tried ISet, but, I'm guessing the solution may be the same for that.

From what I've heard, generic ILists work if you use Windows Communication Foundation (WCF). I haven't tried it yet myself though, so, I can't verify whether it's true.

You can't serialize an interface. You can do something like this though:



NHDaoFactory.GetStoryDao().GetByUser( userID ) returns an IList.

Allthough your function returns an IList, your cast will only work if indeed the implementation returned is a List<Story>. If you're returning an array your cast will 'fail' and since you are using the as statement return null.

Webmethods need to know implementations not supported behaviour (interface).

I should have pointed out I'm using generic collections throughout. So it returns IList<Story> which can be cast to List<Story> with no issues.