WCF学习笔记（二）：简单调用

一个通信会话过程有两个部分组成，客户端和服务端，他们要进行会话就必然有共同的语言约定，在WCF中这称为契约(contract)，定义好通信的约定后，服务端需要确定服务的具体内容，即为配置、运行服务、开放终结点。客户端描述如何从 WCF 服务检索用于创建 WCF 客户端的元数据。

第一、建立契约 

using System;
using System.ServiceModel;
 
namespace Microsoft.ServiceModel.Samples
{
  ServiceContract(Namespace = “http://wengyuli”)] 
  public interface ICalculator
  {
     [OperationContract]
     double Add(double n1, double n2);
   ｝
}

第二、实现契约

public class CalculatorService : ICalculator
{
    public double Add(double n1, double n2)
   {
      double result = n1 + n2;
      return result;
    }
}

第三、发布服务 

static void Main(string[] args)

        {

            Uri baseAddress = new Uri("http://localhost:8000/wengyuli/Service");

            ServiceHost serviceHost = new ServiceHost(typeof(CalculatorService), baseAddress);

            try

            {

                serviceHost.AddServiceEndpoint(typeof(ICalculator), new WSHttpBinding(), "CalculatorService");

                ServiceMetadataBehavior smb = new ServiceMetadataBehavior();

                smb.HttpGetEnabled = true;

                serviceHost.Description.Behaviors.Add(smb);

                serviceHost.Open();

                Console.WriteLine("The service is ready.");

                Console.WriteLine("Press <ENTER> to terminate service.");

                Console.WriteLine();

                Console.ReadLine();

                serviceHost.Close();

            }

            catch (CommunicationException ce)

            {

                Console.WriteLine("An exception occured: {0}", ce.Message);

                serviceHost.Abort();

            }

        }

第四、调用服务

static void Main(string[] args)

        {

            //Create an instance of the WCF Client.

            System.ServiceModel.EndpointAddress epAddress = new EndpointAddress("http://localhost:8000/wengyuli/Service/CalculatorService");

            CalculatorClient client = new CalculatorClient(new WSHttpBinding(), epAddress);

            int value1 = 2;

            int value2 = 5;

            int result = client.Add(value1, value2);

            Console.WriteLine("Add({0},{1}) = {2}", value1, value2, result);

            client.Close();

            Console.WriteLine();

            Console.WriteLine("Press <ENTER> to terminate client.");

            Console.ReadLine();

        }