4 WCF中的RPC和OneWay

1 创建两个控制台项目

   WcfService和WcfClient

在wcfService项目中新建一个wcf服务的文件项(HomeService)会自动附带生成一个IHomeService.cs的文件

using System.ServiceModel;

namespace WcfService
{
    // 注意: 使用“重构”菜单上的“重命名”命令，可以同时更改代码和配置文件中的接口名“IHomeService”。
    [ServiceContract]
    public interface IHomeService
    {
        //默认生成的
        [OperationContract]
        void DoWork(string msg);

        //这个是我后来新加入的接口方法
        [OperationContract(IsOneWay =true)]
        void DoWork_OneWay(string msg);
    }
}

using System;
using System.Linq;
using System.Net;
using System.Net.Sockets;

namespace WcfService
{
    // 注意: 使用“重构”菜单上的“重命名”命令，可以同时更改代码和配置文件中的类名“HomeService”。
    public class HomeService : IHomeService
    {
        public void DoWork_OneWay(string msg)
        {
            Console.WriteLine($"这是OneWay通讯,{msg}");
        }

        void IHomeService.DoWork(string msg)
        {
            var ip = Dns.GetHostAddresses(Dns.GetHostName()).
                FirstOrDefault(i => i.AddressFamily == AddressFamily.InterNetwork).ToString();
            var info = string.Format($"当前 request 由 server={ip}返回message={msg}");
            Console.WriteLine(info);
        }
    }
}

 2 创建WcfService项目会默认在其配置文件中生成相应的wcf配置

    我们请求endPoint中的address，在打开的页面中可以看到有关wsdl的链接

    在1中，我们wcf接口定义了两个方法，这两个方法一个是rpc的 一个是oneway的。rpc发送信息有去有回，oneway只去不回(适合用来指示服务器写日志)

    以下是wsdl代码:    

<?xml version="1.0" encoding="ISO-8859-1"?>
<wsdl:definitions xmlns:wsam="http://www.w3.org/2007/05/addressing/metadata" xmlns:wsa10="http://www.w3.org/2005/08/addressing" xmlns:wsp="http://schemas.xmlsoap.org/ws/2004/09/policy" xmlns:msc="http://schemas.microsoft.com/ws/2005/12/wsdl/contract" xmlns:wsaw="http://www.w3.org/2006/05/addressing/wsdl" xmlns:wsap="http://schemas.xmlsoap.org/ws/2004/08/addressing/policy" xmlns:wsx="http://schemas.xmlsoap.org/ws/2004/09/mex" xmlns:wsa="http://schemas.xmlsoap.org/ws/2004/08/addressing" xmlns:tns="http://tempuri.org/" xmlns:soap12="http://schemas.xmlsoap.org/wsdl/soap12/" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" targetNamespace="http://tempuri.org/" name="HomeService">
<wsdl:types>
<xsd:schema targetNamespace="http://tempuri.org/Imports">
<xsd:import namespace="http://tempuri.org/" schemaLocation="http://localhost:8733/Design_Time_Addresses/WcfService/HomeService?xsd=xsd0"/>
<xsd:import namespace="http://schemas.microsoft.com/2003/10/Serialization/" schemaLocation="http://localhost:8733/Design_Time_Addresses/WcfService/HomeService?xsd=xsd1"/>
</xsd:schema>
</wsdl:types>
<wsdl:message name="IHomeService_DoWork_InputMessage">
<wsdl:part name="parameters" element="tns:DoWork"/>
</wsdl:message>
<wsdl:message name="IHomeService_DoWork_OutputMessage">
<wsdl:part name="parameters" element="tns:DoWorkResponse"/>
</wsdl:message>
<wsdl:message name="IHomeService_DoWork_OneWay_InputMessage">
<wsdl:part name="parameters" element="tns:DoWork_OneWay"/>
</wsdl:message>
<wsdl:portType name="IHomeService">
<wsdl:operation name="DoWork">
<wsdl:input message="tns:IHomeService_DoWork_InputMessage" wsaw:Action="http://tempuri.org/IHomeService/DoWork"/>
<wsdl:output message="tns:IHomeService_DoWork_OutputMessage" wsaw:Action="http://tempuri.org/IHomeService/DoWorkResponse"/>
</wsdl:operation>
<wsdl:operation name="DoWork_OneWay">
<wsdl:input message="tns:IHomeService_DoWork_OneWay_InputMessage" wsaw:Action="http://tempuri.org/IHomeService/DoWork_OneWay"/>
</wsdl:operation>
</wsdl:portType>
<wsdl:binding name="BasicHttpBinding_IHomeService" type="tns:IHomeService">
<soap:binding transport="http://schemas.xmlsoap.org/soap/http"/>
<wsdl:operation name="DoWork">
<soap:operation style="document" soapAction="http://tempuri.org/IHomeService/DoWork"/>
<wsdl:input>
<soap:body use="literal"/>
</wsdl:input>
<wsdl:output>
<soap:body use="literal"/>
</wsdl:output>
</wsdl:operation>
<wsdl:operation name="DoWork_OneWay">
<soap:operation style="document" soapAction="http://tempuri.org/IHomeService/DoWork_OneWay"/>
<wsdl:input>
<soap:body use="literal"/>
</wsdl:input>
</wsdl:operation>
</wsdl:binding>
<wsdl:service name="HomeService">
<wsdl:port name="BasicHttpBinding_IHomeService" binding="tns:BasicHttpBinding_IHomeService">
<soap:address location="http://localhost:8733/Design_Time_Addresses/WcfService/HomeService"/>
</wsdl:port>
</wsdl:service>
</wsdl:definitions>

   我们看到dowork方法由于是rpc(默认rpc)，其节点中有两个节点 一个input 一个output;dowork_OneWay方法是OneWay的（其特性构造函数中OneWay=true）,其节点中只有一个input节点

3.有一点要注意的是

   rpc的方法 请求的时候默认是 wsaw:Action="http://tempuri.org/IHomeService/DoWork"/> 响应是 wsaw:Action="http://tempuri.org/IHomeService/DoWorkResponse"/>，当然这个可以设置，正式由于请求响应的这个头不同，服务才知道哪是请求、哪是响应