WCF 双工的学习

初学WCF。。。。

服务端：

服务契约：

   [ServiceContract(Namespace ="http://serverModel.Samples",SessionMode =SessionMode.Required,
         CallbackContract = typeof(ICalcualtorDuplexCallBack))]
     public interface IService2
     {
        [OperationContract(IsOneWay = true)]
         void Clear();
 
        [OperationContract(IsOneWay = true)]
         void Add(double input);
 
         [OperationContract(IsOneWay = true)]
        void Subtraction(double input);
 
         [OperationContract(IsOneWay = true)]
         void Multiplication(double input);
 
         [OperationContract(IsOneWay =true)]
         void Addition(double input);
 
     }
 
     /// <summary>
     /// 回调
     /// </summary>
     public interface ICalcualtorDuplexCallBack
     {
         [OperationContract(IsOneWay = true)]
         void Equals(double result);
 
         [OperationContract(IsOneWay = true)]
         void Equation(string eqn);
     }

服务部分：

  public class Service2 : IService2
     {
         private double _result;
         private string _equation;
         private ICalcualtorDuplexCallBack _callback = null;
         public Service2()
         {
             _result = 0.0D;
             _equation = _result.ToString(CultureInfo.InvariantCulture);
             //获得Callback回调的公告
             _callback = OperationContext.Current.GetCallbackChannel<ICalcualtorDuplexCallBack>();
         }
         /// <summary>
         /// 清除
         /// </summary>
         public void Clear()
         {
             _callback.Equation(_equation+"="+_result.ToString(CultureInfo.InvariantCulture));
             _result = 0.0D;
             _equation = _result.ToString(CultureInfo.InvariantCulture);
         }
         /// <summary>
         /// 增加
         /// </summary>
         /// <param name="input">参数</param>
         public void Add(double input)
         {
             _result += input;
             _equation += "+" + input.ToString(CultureInfo.InvariantCulture);
             _callback.Equals(_result);
         }
         /// <summary>
         /// 减
         /// </summary>
         /// <param name="input">参数</param>
         public void Subtraction(double input)
         {
             _result -= input;
             _equation += "-" + input.ToString(CultureInfo.InvariantCulture);
             _callback.Equals(_result);
         }
         /// <summary>
         /// 乘
         /// </summary>
         /// <param name="input">参数</param>
         public void Multiplication(double input)
         {
             _result *= input;
             _equation += "*" + input.ToString(CultureInfo.InvariantCulture);
             _callback.Equals(_result);
 
         }
         /// <summary>
         /// 除
         /// </summary>
         /// <param name="input">参数</param>
         public void Addition(double input)
         {
             _result /= input;
             _equation += "*" + input.ToString(CultureInfo.InvariantCulture);
             _callback.Equals(_result);  
         }
 
 
     }

 配置文件:app.config

在双工的时候 不支持 BasicHttpBinding，改wsDualHttpBinding　

 <service name="WcfServiceLibrary1.Service2">
         <!--双工不支持 BasicHttpBinding  所以在这里要用 wsDualHttpBinding -->
         <endpoint address="" binding="wsDualHttpBinding" contract="WcfServiceLibrary1.IService2">
           <identity>
             <dns value="localhost" />
           </identity>
         </endpoint>
         <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
         <host>
           <baseAddresses>
             <add baseAddress="http://localhost:8733/Design_Time_Addresses/WcfServiceLibrary1/Service2/" />
           </baseAddresses>
         </host>
       </service>

客户端：

   public partial class Window1 : Window,ServiceReference2.IService2Callback
     {
         public Window1()
         {
             InitializeComponent();
         }
 
         private void button1_Click(object sender, RoutedEventArgs e)
         {
             System.ServiceModel.InstanceContext instanceContext = new InstanceContext(this);
             ServiceReference2.Service2Client clientw = new Service2Client(instanceContext);
             double value = 2.0D;
             clientw.Open();
             clientw.Add(value);
             clientw.Subtraction(value);
             clientw.Multiplication(value);
             clientw.Addition(value);
             clientw.Clear();
             clientw.Close();
      
         }
 
         public void Equals(double result)
         {
           //  MessageBox.Show("Result:"+result);
             Console.WriteLine("Result:" + result);
         }
 
         public void Equation(string eqn)
         {
 
             Console.WriteLine("Equation:" + eqn);
         }
     }
 }