Hello from Spain,

I have a client-server app. The client is made in three layers (service agent, bll, ui). Client connects to the server through a web service. The the web service's proxy is in the last layer, service agent, so we can see the datasets that come in the proxy from the bll, but i want them in the ui too. I haven't found any pattern or something to acomplish that and i can not find a solution without breaking the encapsulation of the bll.

Any suggestion?

Thanks in regards

Your best bet is to look at the sample application PetShop (link below).

Basically where you have your datasets they have classes that they call the Model which is independent of all layers (just its own project and dll) and so you can reference it from any layer in the solution. This is pretty standard pratcice for n-tier applications. Note that to get a Model project using datasets you might want to consider using typed datasets.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnbda/html/bdasamppet4.asp