开始以为是wcf的session问题 敲了一边代码发现里面没有用session存储数据 经过 自己研究才发现作者是再将wcf的状态存储问题

项目结构如下

 

代码如下

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.ServiceModel;using Contract;namespace Client{    class Program    {        static void Main(string[] args)        {            ChannelFactory
    
      calculatorChannelFactory = new ChannelFactory
     
      ("httpEndpoint");            Console.WriteLine("Create a calculator proxy: proxy1");            ICalculator proxy1 = calculatorChannelFactory.CreateChannel();            Console.WriteLine("Invocate  proxy1.Adds(1)");            proxy1.Adds(1);            Console.WriteLine("Invocate  proxy1.Adds(2)");            proxy1.Adds(2);            Console.WriteLine("The result return via proxy1.GetResult() is : {0}", proxy1.GetResult());            try            {                proxy1.Adds(1);            }            catch (Exception ex)            {                Console.WriteLine("It is fail to invocate the Add after terminating session because \"{0}\"", ex.Message);            }            //(proxy1 as ICommunicationObject).Close();            Console.WriteLine("Create a calculator proxy: proxy2");            ICalculator proxy2 = calculatorChannelFactory.CreateChannel();            Console.WriteLine("Invocate  proxy2.Adds(1)");            proxy2.Adds(1);            Console.WriteLine("Invocate  proxy2.Adds(2)");            proxy2.Adds(2);            Console.WriteLine("The result return via proxy2.GetResult() is : {0}", proxy2.GetResult());            //(proxy2 as ICommunicationObject).Close();            Console.Read();        }    }}
     
    

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using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.ServiceModel;namespace Contract{        [ServiceContract(SessionMode=SessionMode.Required)]   public interface ICalculator    {        //调用任何允许初始化会话服务方法(缺省情况下所有的服务方法都自动初始化Session，也就是 IsInitiating=true)。        //调用任何包含 "IsTerminating=true" 声明的服务方法(缺省情况下所有的服务方法 IsTerminating=false，需要我们显示声明)。        // Terminating 终止意思  Initiating 启动的意思        [OperationContract(IsOneWay=true,IsInitiating=true,IsTerminating=false)]        void Adds(double x);        [OperationContract(IsInitiating = false, IsTerminating = true)]        double GetResult();    }}

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using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading;using Sevice;using System.ServiceModel;namespace Hosting2{    class Program    {        static void Main(string[] args)        {            using (ServiceHost host = new ServiceHost(typeof(CalculatorService)))            {                host.Opened += delegate                {                    Console.WriteLine("The Calculator service has begun to listen");                };                host.Open();                Timer timer = new Timer(delegate { GC.Collect(); }, null, 0, 100);                Console.Read();            }        }    }}

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using System;using System.Collections.Generic;using System.Linq;using System.Text;using Contract;using System.ServiceModel;namespace Sevice{        [ServiceBehavior(InstanceContextMode = InstanceContextMode.Single)]   public class CalculatorService:ICalculator    {       public CalculatorService()       {           Console.WriteLine("Calculator object has been created");       }       ~CalculatorService()       {           Console.WriteLine("Calculator object has been destoried");       }       private double _result;        void ICalculator.Adds(double x)        {            Console.WriteLine("The Add method is invoked and the current session ID is: {0}", OperationContext.Current.SessionId);            this._result += x;        }        double ICalculator.GetResult()        {            Console.WriteLine("The GetResult method is invoked and the current session ID is: {0}", OperationContext.Current.SessionId);            return this._result;        }    }}

 

 

客户端配置如下

服务端配置如下