WCF体验之旅(11):再谈WCF的双向通讯-基于Http的双向通讯V.S.基于TCP的双向通讯(2)

using System;
using System.Collections.Generic;
using System.Text;
using System.ServiceModel;
using Artech.DuplexWCF.Service;
namespace Artech.DuplexWCF.Hosting
{
class Program
{
static void Main(string[] args)
{
using (ServiceHost calculatorHost = new ServiceHost(typeof(CalculatorService)))
{
calculatorHost.Opened += delegate
{
Console.WriteLine("The calculator service has begun to listen");
};
calculatorHost.Open();
Console.Read();
}
}
}
}

bindingConfiguration="" contract="Artech.DuplexWCF.Contract.ICalculator"
name="defaultEndpoint" />        
Callback：Artech.DuplexWCF.Client. CalculatorCallback
using System;
using System.Collections.Generic;
using System.Text;
using Artech.DuplexWCF.Contract;
namespace Artech.DuplexWCF.Client
{
public class CalculatorCallback:ICallback
{
ICallback Members#region ICallback Members
public void DisplayResult(double result)
{
Console.WriteLine("The result is {0}", result);
}
#endregion
}
}

using System;
using System.Collections.Generic;
using System.Text;
using Artech.DuplexWCF.Contract;
using System.ServiceModel;
namespace Artech.DuplexWCF.Client
{
class Program
{
static void Main(string[] args)
{
DuplexChannelFactory channelFactory = new DuplexChannelFactory(
new InstanceContext(new CalculatorCallback()),"defaultEndpoint");
ICalculator calculator = channelFactory.CreateChannel();
Console.WriteLine("Try to invoke the Add method");
try
{
calculator.Add(1, 2);
}
catch (Exception ex)
{
Console.WriteLine("An Exception is thrown!\n\t:Type:{0}\n\tMessage:{1}",
ex.GetType(), ex.Message);
}
Console.Read();
}
}
}