服务端配置文件

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服务端双工协议执行类接口注明回调约束ICallBack

[ServiceContract(CallbackContract =typeof(ICallBack))]    public interface ICallBackContract    {        [OperationContract]        int Plus(int x,int y);      }

服务端设置回掉类库

public interface ICallBack    {        /// 
        /// 回调        /// 
        ///         ///         ///         [OperationContract(IsOneWay =true)]        void Show(int x,int y,int iResult);    }

服务端实现方法

public class CallBackContractService : ICallBackContract    {        public int Plus(int x, int y)        {            int result = x + y;            Thread.Sleep(2000);            ICallBack callBack = OperationContext.Current.GetCallbackChannel
      
       ();            callBack.Show(x, y, result);            return result;        }    }
      

客服端实现调用继承服务端的实现类库

public class CallBackService : MyCallBack.ICallBackContractCallback    {        public void Show(int x, int y, int iResult)        {            Console.WriteLine($"回调显示:{x}+{y}={iResult}");        }    }

客户端调用代码

static void Main(string[] args)        {            MyCallBack.CallBackContractClient client = null;            try            {                                InstanceContext instanceContext = new InstanceContext(new CallBackService());                client = new MyCallBack.CallBackContractClient(instanceContext);                int a=client.Plus(1, 2);                client.Close();            }            catch (Exception ex)            {                if (client != null)                    client.Abort();                Console.WriteLine(ex);            }                        Console.Read();        }