看了很多学习WCF的例子,感觉受益匪浅,但是由于每个人学习的侧重点不同,一些很详细的细节例如每一个属性都是用来干什么的,建立不同的项目类型对创建的服务有什么区别等等,都不得而知。终于,在MSDN上发现了一篇入门教程。讲解的十分基本,十分详细,想进到每一个细节,然我彻底了解入门的每一个细节,整个教程结构清晰,代码简洁,讲解细致,值得推荐。
地址: http://msdn.microsoft.com/en-us/library/ms734712.aspx
做这分5部来讲解创建一个最基本的基于B/S构架的WCF应用。服务是根据输入的两个数字,返回这两个数字的加减乘除运算结果。
第一步:定义WCF服务契约(创建项目,加入引用,定义Interface) 第二部:引入WCF服务契约(添加具体服务函数) 第三部:构架WCF服务,运行WCF服务(添加Uri,定义服务对象地址,运行服务) 第四部:利用工具访问服务,自动生成WCF服务代理的代码文件 第五部:配置一个简单的WCF客户端(用客户端引入服务代理,通过服务代理来访问服务) 第六部:运行程序
先建立一个解决方案。 在这个解决方案下面建立一个叫做Server的控制台应用项目,再建立一个叫做Client的控制台应用项目。 分别给每一个项目添加引用到System.ServiceModel 编辑每个项目下面的Program.cs
服务端Program.cs代码
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代码:
1using System; 2using System.Collections.Generic; 3using System.Text; 4using System.ServiceModel; 5 6namespace ServiceModelSamples 7{ 8 9 class Client 10 { 11 static void Main() 12 { 13 //Step 1: Create an endpoint address and an instance of the WCF Client. 14 EndpointAddress epAddress = new EndpointAddress("http://localhost:8000/ServiceModelSamples/Service/CalculatorService"); 15 CalculatorClient client = new CalculatorClient(new WSHttpBinding(), epAddress); 16 17 18 // Step 2: Call the service operations. 19 // Call the Add service operation. 20 double value1 = 100.00D; 21 double value2 = 15.99D; 22 double result = client.Add(value1, value2); 23 Console.WriteLine("Add({0},{1}) = {2}", value1, value2, result); 24 25 // Call the Subtract service operation. 26 value1 = 145.00D; 27 value2 = 76.54D; 28 result = client.Subtract(value1, value2); 29 Console.WriteLine("Subtract({0},{1}) = {2}", value1, value2, result); 30 31 // Call the Multiply service operation. 32 value1 = 9.00D; 33 value2 = 81.25D; 34 result = client.Multiply(value1, value2); 35 Console.WriteLine("Multiply({0},{1}) = {2}", value1, value2, result); 36 37 // Call the Divide service operation. 38 value1 = 22.00D; 39 value2 = 7.00D; 40 result = client.Divide(value1, value2); 41 Console.WriteLine("Divide({0},{1}) = {2}", value1, value2, result); 42 43 //Step 3: Closing the client gracefully closes the connection and cleans up resources. 44 client.Close(); 45 46 Console.WriteLine(); 47 Console.WriteLine("Press <ENTER> to terminate client."); 48 Console.ReadLine(); 49 50 51 } 52 } 53} 54
服务端创建好了以后,就可以试运行了。 这时候可以用微软提供的命令行工具访问这个服务,生成服务代理 app.config 和 generatedProxy.cs两个文件。
svcutil.exe /language:cs /out:generatedProxy.cs /config:app.config http://localhost:8000/ServiceModelSamples/service
把这两个文件添加到客户端项目里去。 现在就可以编辑客户端代码了。
客户端Program.cs代码
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代码:
1using System; 2using System.ServiceModel; 3using System.ServiceModel.Description; 4 5namespace Microsoft.ServiceModel.Samples 6{ 7 // Define a service contract. 8 [ServiceContract(Namespace = "http://Microsoft.ServiceModel.Samples")] 9 public interface ICalculator 10 { 11 [OperationContract] 12 double Add(double n1, double n2); 13 [OperationContract] 14 double Subtract(double n1, double n2); 15 [OperationContract] 16 double Multiply(double n1, double n2); 17 [OperationContract] 18 double Divide(double n1, double n2); 19 } 20 21 // Service class that implements the service contract. 22 // Added code to write output to the console window. 23 public class CalculatorService : ICalculator 24 { 25 public double Add(double n1, double n2) 26 { 27 double result = n1 + n2; 28 Console.WriteLine("Received Add({0},{1})", n1, n2); 29 Console.WriteLine("Return: {0}", result); 30 return result; 31 } 32 33 public double Subtract(double n1, double n2) 34 { 35 double result = n1 - n2; 36 Console.WriteLine("Received Subtract({0},{1})", n1, n2); 37 Console.WriteLine("Return: {0}", result); 38 return result; 39 } 40 41 public double Multiply(double n1, double n2) 42 { 43 double result = n1 * n2; 44 Console.WriteLine("Received Multiply({0},{1})", n1, n2); 45 Console.WriteLine("Return: {0}", result); 46 return result; 47 } 48 49 public double Divide(double n1, double n2) 50 { 51 double result = n1 / n2; 52 Console.WriteLine("Received Divide({0},{1})", n1, n2); 53 Console.WriteLine("Return: {0}", result); 54 return result; 55 } 56 } 57 58 59 class Program 60 { 61 static void Main(string[] args) 62 { 63 64 // Step 1 of the address configuration procedure: Create a URI to serve as the base address. 65 Uri baseAddress = new Uri("http://localhost:8000/ServiceModelSamples/Service"); 66 67 // Step 1 of the hosting procedure: Create ServiceHost 68 ServiceHost selfHost = new ServiceHost(typeof(CalculatorService), baseAddress); 69 try 70 { 71 72 73 // Step 3 of the hosting procedure: Add a service endpoint. 74 selfHost.AddServiceEndpoint( 75 typeof(ICalculator), 76 new WSHttpBinding(), 77 "CalculatorService"); 78 79 80 // Step 4 of the hosting procedure: Enable metadata exchange. 81 ServiceMetadataBehavior smb = new ServiceMetadataBehavior(); 82 smb.HttpGetEnabled = true; 83 selfHost.Description.Behaviors.Add(smb); 84 85 // Step 5 of the hosting procedure: Start (and then stop) the service. 86 selfHost.Open(); 87 Console.WriteLine("The service is ready."); 88 Console.WriteLine("Press <ENTER> to terminate service."); 89 Console.WriteLine(); 90 Console.ReadLine(); 91 92 // Close the ServiceHostBase to shutdown the service. 93 selfHost.Close(); 94 } 95 catch (CommunicationException ce) 96 { 97 Console.WriteLine("An exception occurred: {0}", ce.Message); 98 selfHost.Abort(); 99 } 100 } 101 } 102} 103
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