wcf学习笔记1 hello world程序

1.wcf入门示例

2.源代码下载

1.wcf入门示例

1.1 定义contract

其实这里的contract简单的将就是一个interface，但是注意的是这里的接口需要添加ServiceContract属性，接口中的方法只有添加了OperationContract才是公开的contract方法。

[ServiceContract(Namespace = "http://Microsoft.ServiceModel.Samples")]
public interface ICalculator
{
[OperationContract]
double Add(double d1, double d2);
[OperationContract]
double Minus(double d1, double d2);
[OperationContract]
double Divide(double d1, double d2);
[OperationContract]
double Multiply(double d1, double d2);
}

1.2 实现该contract的service

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ServiceModel;

namespace Microsoft.ServiceModel.Samples
{
class CalculatorService : ICalculator
{
#region ICalculator 成员

public double Add(double d1, double d2)
{
double result = d1 + d2;
Console.WriteLine("Received ({0},{1})", d1, d2);
Console.WriteLine("Return: {0}", result);
return result;
}

public double Minus(double d1, double d2)
{
double result = d1 - d2;
Console.WriteLine("Received ({0},{1})", d1, d2);
Console.WriteLine("Return: {0}", result);
return result;
}

public double Divide(double d1, double d2)
{
double result = d1 / d2;
Console.WriteLine("Received ({0},{1})", d1, d2);
Console.WriteLine("Return: {0}", result);
return result;
}

public double Multiply(double d1, double d2)
{
double result = d1 * d2;
Console.WriteLine("Received ({0},{1})", d1, d2);
Console.WriteLine("Return: {0}", result);
return result;
}

#endregion
}
}

1.3 承载service

承载一个wcf服务可以使用下面的步骤：

1.创建ServiceHost承载该服务

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

2.使用try...catch块，并在其中添加下面三步中的代码：

try
{
// ...
}
catch (CommunicationException ce)
{
Console.WriteLine("An exception occurred: {0}", ce.Message);
selfHost.Abort();
}

3.添加服务终结点

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

4.Enable Metadata Exchange

ServiceMetadataBehavior smb = new ServiceMetadataBehavior();
smb.HttpGetEnabled = true;
selfHost.Description.Behaviors.Add(smb);

5.打开ServiceHost

selfHost.Open();

完整代码如下：

static void Main(string[] args)
{
Uri baseAddress = new Uri("http://localhost:8000/ServiceModelSamples/Service");

ServiceHost selfHost = new ServiceHost(typeof(CalculatorService), baseAddress);
try
{

// Step 3 of the hosting procedure: Add a service endpoint.
selfHost.AddServiceEndpoint(
typeof(ICalculator),
new WSHttpBinding(),
"CalculatorService");

// Step 4 of the hosting procedure: Enable metadata exchange.
ServiceMetadataBehavior smb = new ServiceMetadataBehavior();
smb.HttpGetEnabled = true;
selfHost.Description.Behaviors.Add(smb);

// Step 5 of the hosting procedure: Start (and then stop) the service.
selfHost.Open();
Console.WriteLine("The service is ready.");
Console.WriteLine("Press <ENTER> to terminate service.");
Console.WriteLine();
Console.ReadLine();

// Close the ServiceHostBase to shutdown the service.
selfHost.Close();
}
catch (CommunicationException ce)
{
Console.WriteLine("An exception occurred: {0}", ce.Message);
selfHost.Abort();
}
}

1.4生成客户端使用代码

svcutil.exe /language:cs /out:generatedProxy.cs /config:app.config http://localhost:8000/ServiceModelSamples/service

生成app.config和generatedProxy.cs两个文件：

app.config

<?xml version="1.0" encoding="utf-8"?>
<configuration>
<system.serviceModel>
<bindings>
<wsHttpBinding>
<binding name="WSHttpBinding_ICalculator" closeTimeout="00:01:00"
openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00"
bypassProxyOnLocal="false" transactionFlow="false" hostNameComparisonMode="StrongWildcard"
maxBufferPoolSize="524288" maxReceivedMessageSize="65536"
messageEncoding="Text" textEncoding="utf-8" useDefaultWebProxy="true"
allowCookies="false">
<readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"
maxBytesPerRead="4096" maxNameTableCharCount="16384" />
<reliableSession ordered="true" inactivityTimeout="00:10:00"
enabled="false" />
<security mode="Message">
<transport clientCredentialType="Windows" proxyCredentialType="None"
realm="">
<extendedProtectionPolicy policyEnforcement="Never" />
</transport>
<message clientCredentialType="Windows" negotiateServiceCredential="true"
algorithmSuite="Default" establishSecurityContext="true" />
</security>
</binding>
</wsHttpBinding>
</bindings>
<client>
<endpoint address="http://localhost:8000/ServiceModelSamples/Service/CalculatorService"
binding="wsHttpBinding" bindingConfiguration="WSHttpBinding_ICalculator"
contract="ICalculator" name="WSHttpBinding_ICalculator">
<identity>
<userPrincipalName value="home-PC\home" />
</identity>
</endpoint>
</client>
</system.serviceModel>
</configuration>

[/code]

generatedProxy.cs

//------------------------------------------------------------------------------
// <auto-generated>
//     此代码由工具生成。
//     运行时版本:2.0.50727.4927
//
//     对此文件的更改可能会导致不正确的行为，并且如果
//     重新生成代码，这些更改将会丢失。
// </auto-generated>
//------------------------------------------------------------------------------

[System.CodeDom.Compiler.GeneratedCodeAttribute("System.ServiceModel", "3.0.0.0")]
[System.ServiceModel.ServiceContractAttribute(Namespace="http://Microsoft.ServiceModel.Samples", ConfigurationName="ICalculator")]
public interface ICalculator
{

[System.ServiceModel.OperationContractAttribute(Action="http://Microsoft.ServiceModel.Samples/ICalculator/Add", ReplyAction="http://Microsoft.ServiceModel.Samples/ICalculator/AddResponse")]
double Add(double d1, double d2);

[System.ServiceModel.OperationContractAttribute(Action="http://Microsoft.ServiceModel.Samples/ICalculator/Minus", ReplyAction="http://Microsoft.ServiceModel.Samples/ICalculator/MinusResponse")]
double Minus(double d1, double d2);

[System.ServiceModel.OperationContractAttribute(Action="http://Microsoft.ServiceModel.Samples/ICalculator/Divide", ReplyAction="http://Microsoft.ServiceModel.Samples/ICalculator/DivideResponse")]
double Divide(double d1, double d2);

[System.ServiceModel.OperationContractAttribute(Action="http://Microsoft.ServiceModel.Samples/ICalculator/Multiply", ReplyAction="http://Microsoft.ServiceModel.Samples/ICalculator/MultiplyResponse")]
double Multiply(double d1, double d2);
}

[System.CodeDom.Compiler.GeneratedCodeAttribute("System.ServiceModel", "3.0.0.0")]
public interface ICalculatorChannel : ICalculator, System.ServiceModel.IClientChannel
{
}

[System.Diagnostics.DebuggerStepThroughAttribute()]
[System.CodeDom.Compiler.GeneratedCodeAttribute("System.ServiceModel", "3.0.0.0")]
public partial class CalculatorClient : System.ServiceModel.ClientBase<ICalculator>, ICalculator
{

public CalculatorClient()
{
}

public CalculatorClient(string endpointConfigurationName) :
base(endpointConfigurationName)
{
}

public CalculatorClient(string endpointConfigurationName, string remoteAddress) :
base(endpointConfigurationName, remoteAddress)
{
}

public CalculatorClient(string endpointConfigurationName, System.ServiceModel.EndpointAddress remoteAddress) :
base(endpointConfigurationName, remoteAddress)
{
}

public CalculatorClient(System.ServiceModel.Channels.Binding binding, System.ServiceModel.EndpointAddress remoteAddress) :
base(binding, remoteAddress)
{
}

public double Add(double d1, double d2)
{
return base.Channel.Add(d1, d2);
}

public double Minus(double d1, double d2)
{
return base.Channel.Minus(d1, d2);
}

public double Divide(double d1, double d2)
{
return base.Channel.Divide(d1, d2);
}

public double Multiply(double d1, double d2)
{
return base.Channel.Multiply(d1, d2);
}
}

[/code]

1.5 客户端程序

static void Main(string[] args)
{
CalculatorClient client = new CalculatorClient();

// Step 2: Call the service operations.
// Call the Add service operation.
double value1 = 100.00D;
double value2 = 15.99D;
double result = client.Add(value1, value2);
Console.WriteLine("Add({0},{1}) = {2}", value1, value2, result);

// Call the Subtract service operation.
value1 = 145.00D;
value2 = 76.54D;
result = client.Minus(value1, value2);
Console.WriteLine("Subtract({0},{1}) = {2}", value1, value2, result);

// Call the Multiply service operation.
value1 = 9.00D;
value2 = 81.25D;
result = client.Multiply(value1, value2);
Console.WriteLine("Multiply({0},{1}) = {2}", value1, value2, result);

// Call the Divide service operation.
value1 = 22.00D;
value2 = 7.00D;
result = client.Divide(value1, value2);
Console.WriteLine("Divide({0},{1}) = {2}", value1, value2, result);

//Step 3: Closing the client gracefully closes the connection and cleans up resources.
client.Close();

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

}

2.源代码下载

源代码下载