不说废话,直接上代码。以下服务创建是在独立的WCF类库中,若采用WCF应程程序,定义及创建服务代码均相同,但文件名不同,是CalculatorService.svc
第一步,定义服务契约(Service Contract),即:定义一个服务接口
using System.ServiceModel; namespace WcfServiceLibrary1 { [ServiceContract(Namespace="http://www.zuowenjun.cn")] public interface ICalculator { [OperationContract] double Add(double x, double y); [OperationContract] double Subtract(double x, double y); [OperationContract] double Multiply(double x, double y); [OperationContract] double Divide(double x, double y); } }
第二步,实现服务契约,即:实现第一步的接口
namespace WcfServiceLibrary1 { public class CalculatorService : ICalculator { public double Add(double x, double y) { return x + y; } public double Subtract(double x, double y) { return x - y; } public double Multiply(double x, double y) { return x * y; } public double Divide(double x, double y) { return x / y; } } }
第三步,创建服务寄宿程序
WCF服务需要依存一个运行着的进程(宿主),服务寄宿就是为服务指定一个宿主的过程。WCF是一个基于消息的通信框架,采用基于终结点(Endpoint)的通信手段。终结点由地址(Address)、绑定(Binding)和契约(Contract)三要素组成
服务寄宿程序可以是控制台应用程序,winform,Windows服务,以及IIS(IIS的寄宿方法与以下代码实现不同)
1.通过代码来实现服务寄宿
using System; using WcfServiceLibrary1; using System.ServiceModel; using System.ServiceModel.Description; namespace ConsoleApplicationHost { class Program { static void Main(string[] args) { BuildServiceHostByCode(); } static void BuildServiceHostByCode() { using (ServiceHost host = new ServiceHost(typeof(CalculatorService))) { host.AddServiceEndpoint(typeof(ICalculator), new WSHttpBinding(), "http://127.0.0.1:12300/CalculatorService"); if (host.Description.Behaviors.Find<ServiceMetadataBehavior>() == null) { ServiceMetadataBehavior behavior = new ServiceMetadataBehavior(); behavior.HttpGetEnabled = true; behavior.HttpGetUrl = new Uri("http://127.0.0.1:12300/CalculatorService/metadata"); host.Description.Behaviors.Add(behavior); } host.Opened += (s, e) => { Console.WriteLine("CalculaorService已经启动,按按回车键终止服务!"); }; host.Open(); Console.ReadLine(); } } } }
2.通过Config配置文件来实现服务寄宿(可以直接使用VS提供的配置工具来配置WCF,方法:工具(Tools)菜单-->选择“WCF服务配置编辑器”子项)
<?xml version="1.0" encoding="utf-8" ?> <configuration> <system.serviceModel> <behaviors> <serviceBehaviors> <behavior name="CalculatorServicemetadatabehavior"> <serviceMetadata httpGetEnabled="true" httpGetUrl="http://127.0.0.1:12306/CalculatorService/metadata"/> </behavior> </serviceBehaviors> </behaviors> <services> <service name="WcfServiceLibrary1.CalculatorService" behaviorConfiguration="CalculatorServicemetadatabehavior"> <endpoint address="http://127.0.0.1:12306/CalculatorService" binding="wsHttpBinding" contract="WcfServiceLibrary1.ICalculator"> </endpoint> </service> </services> </system.serviceModel> </configuration>
using System; using WcfServiceLibrary1; using System.ServiceModel; using System.ServiceModel.Description; namespace ConsoleApplicationHost { class Program { static void Main(string[] args) { BuildServiceHostByConfig(); } static void BuildServiceHostByConfig() { using (ServiceHost host = new ServiceHost(typeof(CalculatorService))) { host.Opened += (s, e) => { Console.WriteLine("CalculaorService已经启动,按按回车键终止服务!"); }; host.Open(); Console.ReadLine(); } } } }
3.通过IIS来实现服务寄宿
创建一个Asp.net空Web应用程序,然后添加一个WCF服务文件。这里WCF服务文件与Web 服务中的.asmx文件类似。基于IIS的服务寄宿要求相应的WCF服务具有相应的.svc文件,.svc文件部署于IIS站点中,对WCF服务的调用体现在对.svc文件的访问上。
WCF服务文件的内容很简单,仅仅包含一个ServiceHost指令,该指令具有一个必须的Service属性和一些可选的属性。所以对应的.svc文件内容如下所示:
<%@ ServiceHost Language="C#" Debug="true" Service="WcfServiceLibrary1.CalculatorService" %>
Web.Config配置如下(WCF服务配置均相同,唯一不同的是在添加终结点中无需指定地址,因为.svc所在的地址就是服务的地址。): <configuration> <system.serviceModel> <behaviors> <serviceBehaviors> <behavior name="CalculatorServicemetadatabehavior"> <serviceMetadata httpGetEnabled="true" /> </behavior> </serviceBehaviors> </behaviors> <services> <service name="WcfServiceLibrary1.CalculatorService" behaviorConfiguration="CalculatorServicemetadatabehavior"> <endpoint binding="wsHttpBinding" contract="WcfServiceLibrary1.ICalculator"> </endpoint> </service> </services> </system.serviceModel> </configuration>
第四步,在客户端程序中使用(调用)WCF服务
1.根据WCF服务发布的元数据地址引用WCF服务,系统自动生成一系列的类,包含一个服务契约接口、一个服务代理对象和其他相关的类。
2.直接使用系统自动生成的客户服务代理类CalculatorClient来调用相关方法。
using System; using ConsoleApplicationClient.CalculatorServices; using System.ServiceModel; namespace ConsoleApplicationClient { class Program { static void Main(string[] args) { CallServiceByReference(); Console.WriteLine("按任意键结束。"); Console.Read(); } static void CallServiceByReference() { using (CalculatorClient proxy = new CalculatorClient()) { CallService(proxy.Add); CallService(proxy.Subtract); CallService(proxy.Multiply); CallService(proxy.Divide); } } static void CallService(Func<double, double, double> serviceMethod) { Console.Write("请输入第1数字:"); double input1 = double.Parse(Console.ReadLine()); Console.Write("请输入第2数字:"); double input2 = double.Parse(Console.ReadLine()); double result = serviceMethod(input1, input2); string methodName = serviceMethod.Method.Name; Console.Write("两数字{0}结果:{1}\n", methodName, result); } } }
3.上述使用方法的前提是引用WCF服务元数据地址,然后由VS系统自动生成一系列的类,我们也可在不引用的情况下,使用WCF服务,前提是必需创建或引用文中第一步的服务契约及服务实现,然后便可使用如下方法:
using System; using ConsoleApplicationClient.CalculatorServices; using System.ServiceModel; namespace ConsoleApplicationClient { class Program { static void Main(string[] args) { CallServiceByCode(); Console.WriteLine("按任意键结束。"); Console.Read(); } static void CallServiceByCode() { //using (ChannelFactory<ICalculator> channelFactory = new ChannelFactory<ICalculator>(new WSHttpBinding(), "http://127.0.0.1:12306/CalculatorService")) //如果CONFIG文件中有配置endpoint,则可使用下面的构造函数(参数为指定endpoint的配置名称),若没有配置则需使用上面的构造函数(参数为指定绑定方式及服务地址) using (ChannelFactory<ICalculator> channelFactory = new ChannelFactory<ICalculator>("WSHttpBinding_ICalculator")) { ICalculator proxy = channelFactory.CreateChannel(); using (proxy as IDisposable) { CallService(proxy.Add); CallService(proxy.Subtract); CallService(proxy.Multiply); CallService(proxy.Divide); } } } static void CallService(Func<double, double, double> serviceMethod) { Console.Write("请输入第1数字:"); double input1 = double.Parse(Console.ReadLine()); Console.Write("请输入第2数字:"); double input2 = double.Parse(Console.ReadLine()); double result = serviceMethod(input1, input2); string methodName = serviceMethod.Method.Name; Console.Write("两数字{0}结果:{1}\n", methodName, result); } } }
客户端配置文件如下:
<?xml version="1.0" encoding="utf-8" ?> <configuration> <system.serviceModel> <client> <endpoint address="http://127.0.0.1:12306/CalculatorService" binding="wsHttpBinding" contract="CalculatorServices.ICalculator" name="WSHttpBinding_ICalculator"> </endpoint> </client> </system.serviceModel> </configuration>
说明:发表这篇文章参考了如下作者的文章:
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