读《WCF技术剖析》（卷一）

SOA的基本特性：

 http://www.cnblogs.com/danye/archive/2009/07/27/1532403.html

1.服务时自制的

2.依赖于开放的标准

3.支持跨平台

4.鼓励创建可组合的服务

5.鼓励服务的复用

6.强调松耦合

WCF是对现有Windows平台下分布式通信技术的整合。过去几年比较典型的分布式通信技术有COM/DCOM,Enterprise Service,.NET Remoting,XMLWeb服务,MSMQ等。

建立一个简单的WCF应用

用VS2008新建四个项目，Contracts,Services,Hosting,Client.

Contracts 类库项目
using System.ServiceModel;

namespace Danye.WcfServices.Contracts
{
[ServiceContract(Name="CalculatorServices",Namespace="http://mywinxp.vicp.net")]
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);
}
}

Services类库项目
using Danye.WcfServices.Contracts;

namespace Danye.WcfServices.Services
{
public class CalculatorServices: ICalculator
{

#region ICalculator 成员

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;
}

#endregion

}
}

Host类库项目
using System;
using System.ServiceModel;
using System.ServiceModel.Description;
using Danye.WcfServices.Contracts;
using Danye.WcfServices.Services;

namespace Danye.WcfServices.Hosting
{
class Program
{
static void Main(string[] args)
{
using (ServiceHost host = new ServiceHost(typeof(CalculatorServices)))
{
host.AddServiceEndpoint(typeof(ICalculator), new WSHttpBinding(), "http://127.0.0.1:9999/calculatorservice");
if (host.Description.Behaviors.Find<ServiceMetadataBehavior>() == null)
{
ServiceMetadataBehavior behavior = new ServiceMetadataBehavior();
behavior.HttpGetEnabled = true;
behavior.HttpGetUrl = new Uri("http://127.0.0.1:9999/calculatorservice/metadata");
host.Description.Behaviors.Add(behavior);
}
host.Opened += delegate
{
Console.WriteLine("CalculatorService已经启动，按任意键终止服务!");
};
host.Open();
Console.Read();
}
}
}
}

上面是通过代码来host，很繁琐，通过配置工具来配置方便很多，打开vs2008

最后的File->另存为App.config 然后将此文件添加到Hosting中。

App.config代码

<?xml version="1.0" encoding="utf-8"?>
<configuration>
<system.serviceModel>
<behaviors>
<serviceBehaviors>
<behavior name="metedataBehavior">
<serviceMetadata httpGetEnabled="true" httpGetUrl="http://127.0.0.1:9999/calculatorservice/metadata" />
</behavior>
</serviceBehaviors>
</behaviors>
<services>
<service behaviorConfiguration="metedataBehavior" name="Danye.WcfServices.Services.CalculatorServices">
<endpoint address="http://127.0.0.1:9999/calculatorservice" binding="basicHttpBinding"
bindingConfiguration="" contract="Danye.WcfServices.Contracts.ICalculator" />
</service>
</services>
</system.serviceModel>
</configuration>

运行下

发现报错，提示

HTTP 无法注册 URL http://+:9999/calculatorservice/。进程不具有此命名空间的访问权限(有关详细信息，请参阅 http://go.microsoft.com/fwlink/?LinkId=70353)。

这是因为win7或vista权限问题，用管理员模式打开vs2008即可

 

接下来创建Client控制台项目，首先需要引入服务，在引入服务时，host必须运行着。

 

Client端代码如下：
using System;
using Danye.WcfServices.Client.CalculatorServices;
namespace Danye.WcfServices.Client
{
class Program
{
static void Main(string[] args)
{
using (CalculatorServicesClient proxy = new CalculatorServicesClient())
{
Console.WriteLine("x+y={2}, when x={0} and y={1}", 1, 2, proxy.Add(1, 2));

Console.WriteLine("x-y={2}, when x={0} and y={1}", 1, 2, proxy.Subtract(1, 2));

Console.WriteLine("x*y={2}, when x={0} and y={1}", 1, 2, proxy.Multiply(1, 2));

Console.WriteLine("x/y={2}, when x={0} and y={1}", 1, 2, proxy.Divide(1, 2));

Console.Read();

}
}
}
}

ok，上面是通过创建自动生成的，继承自ClientBase<T>的类型对象进行服务调用。

下面讲的是通过ChannelFactory<T>调用。

首先去除client的对服务的引用。右键删除。然后添加一个app.config配置文件，用wcf配置工具进行配置

 

 

保存即可

然后修改client端代码
using System;
using System.ServiceModel;
using Danye.WcfServices.Contracts;
namespace Danye.WcfServices.Client
{
class Program
{
static void Main(string[] args)
{
using (ChannelFactory<ICalculator> channelFactory=new ChannelFactory<ICalculator>("calculatorservice") )
{
ICalculator proxy = channelFactory.CreateChannel();

Console.WriteLine("x+y={2}, when x={0} and y={1}", 1, 2, proxy.Add(1, 2));

Console.WriteLine("x-y={2}, when x={0} and y={1}", 1, 2, proxy.Subtract(1, 2));

Console.WriteLine("x*y={2}, when x={0} and y={1}", 1, 2, proxy.Multiply(1, 2));

Console.WriteLine("x/y={2}, when x={0} and y={1}", 1, 2, proxy.Divide(1, 2));

Console.Read();
}
}
}
}

ok 同样可以运行。

Finally,讲的是host在IIS中。

在host在iis中，我碰到了个问题，总是提示

The type 'Danye.WcfServices.Services.CalculatorService', provided as the Service attribute value in the ServiceHost directive could not be found.

究其原因，主要是没认真看书上写的，要把生成的目录设置为bin，因为asp.net最后编译好的代码都在bin目录里

 

web.config代码
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<system.serviceModel>
<behaviors>
<serviceBehaviors>
<behavior name="metadataBehavior">
<serviceMetadata httpGetEnabled="true" />
</behavior>
</serviceBehaviors>
</behaviors>
<services>
<service behaviorConfiguration="metadataBehavior" name="Danye.WcfServices.Services.CalculatorService">
<endpoint binding="basicHttpBinding" contract="Danye.WcfServices.Contracts.ICalculator" />
</service>
</services>
</system.serviceModel>
<system.webServer>
<directoryBrowse enabled="true" />
</system.webServer>
</configuration>

CalculatorService.cs代码
using Danye.WcfServices.Contracts;
namespace Danye.WcfServices.Services
{
public class CalculatorService: ICalculator
{

#region ICalculator 成员

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;
}

#endregion

}
}

CalculatorService.svc代码
%@ServiceHost Service="Danye.WcfServices.Services.CalculatorService"%

最后生成下就ok了

 

第一篇读书笔记完成了 ^_^~
下面是自我寄宿和通过iis寄宿的代码 https://files.cnblogs.com/danye/WcfServices_Self-Host.rar https://files.cnblogs.com/danye/WcfServices_IIS-Host.rar