WCF和实体框架。 如何为所有实体创建服务层

Question

Ok so I am a bit lazy here. I want a Generic WCF service Layer to support my database functionality. I have a repository pattern for DB access - but in WCF from what I am reading it seems if I want to access each of these Entities - I need to create a Service Contract for each entity (I guess multiple endpoints.) As I do not want multiple hosts. WCF Data Services only supports webHTTPBinding and not Net.Tcp Binding. The DAL EF data POCO's are shared between client and service host. So is it possible to use Generics since the types are shared in both client and server? If so a small simple example should be enough to get me on my way.

Answer 1

Basically what you need to do here is break everything down into seperate libraries. You need to create seperate classes for the Service Contract, Service Interface, Data Layer and a Data Transfer Objects library.

You do this so that the Service Interface library can be shared on the client side and used to build a proxy using the ChannelFactory object and being passed a reference to the interface. (Dont use the "Add Service Reference" option in Visual Studio - build it yourself manually)

Doing this will enable to customise the proxy creation. What you cant do is make generic functions to access the service methods since the whole point of SOAP and WCF is that the methods form a solid contract between client and server. However, doing it this way will at least provide you with a way of sharing some of the burden between client and server in terms of code writing.

Miguel Castro offers up a good article here that explains the method: www.codemag.com/article/0809101