我如何返回从WCF合同接口的参考？ [英] How do I return a reference to an interface from a WCF contract?

问题描述

我有一个WCF服务。我可以返回一个具体的类没有问题，但返回的接口的引用会导致以下问题。

I have a WCF service. I can return a concrete class without a problem, but returning a reference to an interface causes the following issue.

的CommunicationException
套接字连接被中止。

CommunicationException occurred "The socket connection was aborted. This could be caused by an error processing your message or a receive timeout being exceeded by the remote host, or an underlying network resource issue. Local socket timeout was '00:00:59.2030000'."

当我尝试从WCF服务得到一个类的实例，就会出现此：

This occurs when I try to get an instance of a class from a WCF service:

//create the connection
ChannelFactory<IService> _ChannelFactory = new ChannelFactory<IService>(_EndpointName);
IService _ServiceProxy = _ChannelFactory.CreateChannel();

//communication exception thrown here
ITestInterface okcomputer = _ServiceProxy.GetTest();

IService和ITestInterface都正常OperationContract的属性和等。该服务具有属性：[ServiceBehavior（InstanceContextMode = InstanceContextMode.Single）]

IService and ITestInterface have all the normal OperationContract attributes and such. The Service has the attribute: [ServiceBehavior(InstanceContextMode = InstanceContextMode.Single)]

除此之外，类和接口都没有什么特别的。

other than that, the classes and interfaces are nothing special.

我觉得有一些特殊的技巧从WCF接口返回一个类接口，否则我不会有这个问题..有什么诀窍？

I feel like there is some special trick to returning a class interface from a WCF interface, otherwise I wouldn't be having this problem.. What's the trick?

推荐答案

您不能返回一个接口，直到永远。它怎么会被序列化？

You cannot return an interface, ever. How would it be serialized?

接口是关于行为。行为不序列化，唯一的数据。

Interfaces are about behavior. Behavior is not serialized, only data.

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