WCF 回调及重入

服务端类代码

服务契约：

    [ServiceContract(CallbackContract=typeof(IserviceCallBack))]
    public interface IService1
    {
        [OperationContract]
        string GetData(int value);

    }

    public interface IserviceCallBack
    {
        [OperationContract]
        string GetClientData();
    }

服务实例：

   [ServiceBehavior(ConcurrencyMode=ConcurrencyMode.Reentrant)]
    public class Service1 : IService1
    {
        public string GetData(int value)
        {
            IserviceCallBack callback = OperationContext.Current.GetCallbackChannel<IserviceCallBack>();
            string value1= callback.GetClientData();
            return string.Format("You entered: {0} and CallValue is {1}", value,value1);
        }
    }

由于在方法中调用客户端的结果，所以使用重入

客户端代码

    class CallBack : IService1Callback
    {
        public string GetClientData()
        {
            return "test callback value";
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            Service1Client client = new Service1Client(new InstanceContext(new CallBack()));
            Console.Write(client.GetData(1));
            Console.Read();
        } 
    }

结果是：You entered: 1 and CallValue is test callback value