WCF实现方法重载
一、服务契约(包括回调契约)通过指定不同的OperationContract.Name来实现重载方法,当然代码部份还是必需符合C#的重载要求,即相同方法名称,不同的参数个数或参数类型
namespace Contract { [ServiceContract(Name = "HellworldService", Namespace = "http://www.zuowenjun.cn")] public interface IHelloWorld { [OperationContract(Name = "GetHelloWorldWithoutParam")] string GetHelloWorld(); [OperationContract(Name = "GetHelloWorldWithParam")] string GetHelloWorld(string name); } }
二、创建服务寄宿程序与不含重载方法的WCF服务相同,在此不再重述。
三、在客户端调用WCF服务
A.若直接通过引用WCF服务的方法生成的相关服务类,则使用方法如下(说明:服务方法名称不再是我们之前定义的方法名,而是OperationContract.Name)
namespace Client { class Program { static void Main(string[] args) { using (HellworldServiceClient helloWorldProxy = new HellworldServiceClient()) { Console.WriteLine("服务返回的结果是: {0}", helloWorldProxy.GetHelloWorldWithoutParam()); Console.WriteLine("服务返回的结果是: {0}", helloWorldProxy.GetHelloWorldWithParam("Zuowenjun")); } Console.ReadLine(); } } }
B.若想保持与服务契约定义的方法名称相同,做到真正意义上的方法重载,则可自己实现客户端代理类,而不是通过引用后由VS代码生成。
using Contract; using System.ServiceModel; namespace Client { class HellworldServiceClient : ClientBase<IHelloWorld>, IHelloWorld { #region IHelloWorld Members public string GetHelloWorld() { return this.Channel.GetHelloWorld(); } public string GetHelloWorld(string name) { return this.Channel.GetHelloWorld(name); } #endregion } }
注意:IHelloWorld服务契约接口必须先自己重新定义或引用之前服务契约接口类库,建议将服务契约接口单独放在一个类库,这样就可以减少重写接口的时间。
同理,若想保持服务契约接口的继承,也需要在客户端重新定义服务契约及客户端服务代理类,这里直接引用Learning hard的文章内容:
// 自定义代理类 public class SimpleInstrumentationClient : ClientBase<ICompleteInstrumentation>, ISimpleInstrumentation { #region ISimpleInstrumentation Members public string WriteEventLog() { return this.Channel.WriteEventLog(); } #endregion } public class CompleteInstrumentationClient:SimpleInstrumentationClient, ICompleteInstrumentation { public string IncreatePerformanceCounter() { return this.Channel.IncreatePerformanceCounter(); } } //调用服务 class Program { static void Main(string[] args) { using (SimpleInstrumentationClient proxy1 = new SimpleInstrumentationClient()) { Console.WriteLine(proxy1.WriteEventLog()); } using (CompleteInstrumentationClient proxy2 = new CompleteInstrumentationClient()) { Console.WriteLine(proxy2.IncreatePerformanceCounter()); } Console.Read(); } }
当然也可以通过配置不同的endpoint终结点的,contract设为相应的服务契约接口
<configuration> <system.serviceModel> <client> <endpoint address="http://localhost:9003/instrumentationService/mex" binding="mexHttpBinding" contract="ClientConsoleApp.ISimpleInstrumentation" name="ISimpleInstrumentation" /> <endpoint address="http://localhost:9003/instrumentationService/mex" binding="mexHttpBinding" contract="ClientConsoleApp.ICompleteInstrumentation" name="ICompleteInstrumentation" /> </client> </system.serviceModel> </configuration>
调用如下:
class Program { static void Main(string[] args) { using (ChannelFactory<ISimpleInstrumentation> simpleChannelFactory = new ChannelFactory<ISimpleInstrumentation>("ISimpleInstrumentation")) { ISimpleInstrumentation simpleProxy = simpleChannelFactory.CreateChannel(); using (simpleProxy as IDisposable) { Console.WriteLine(simpleProxy.WriteEventLog()); } } using (ChannelFactory<ICompleteInstrumentation> completeChannelFactor = new ChannelFactory<ICompleteInstrumentation>("ICompleteInstrumentation")) { ICompleteInstrumentation completeProxy = completeChannelFactor.CreateChannel(); using (completeProxy as IDisposable) { Console.WriteLine(completeProxy.IncreatePerformanceCounter()); } } Console.Read(); } }
这篇文章参考和引用如下作者的文章内容:
文章同步发表于我的个人网站:http://www.zuowenjun.cn/post/2015/03/25/135.html