http://www.ilanever.com/article/sitedetail.html?id=164
1. 显示添加服务行为，为服务自动提供基于HTTP-GET的元数据。2. 采用元数据交换终结点发布元数据。
目录
1. 显示添加服务行为，为服务自动提供基于HTTP-GET的元数据。
一旦启用了基于HTTP-GET的元数据交换，在浏览器中就可以通过HTTP基地址进行访问。如果一切正确，就会获得一个服务帮助页面。
为服务添加服务行为可以采用配置方式，也可以采用编程方式。
采用配置方式：
<system.ServiceModel>
<services>
<service name="MyService" behaviorConfiguration = "MEXGET">
<host>
<baseAddresses>
<add baseAddress = "http://localhost:10000"/>
</baseAddresses>
</host>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior name = "MEXGET">
<serviceMetadata httpGetEnabled = "true"/>
</behavior>
</serviceBehaviors>
</behaviors>
</system.ServiceModel>
采用编程方式：
ServiceHost host = new ServiceHost(typeof(MyService),new Uri("http://localhost:10000"));
ServiceMetadataBehavior metadataBehavior;
metadataBehavior = host.Description.Behaviors.Find();
if(metadataBehavior == null)
{
metadataBehavior = new ServiceMetadataBehavior();
metadataBehavior.HttpGetEnabled = true;
host.Description.Behaviors.Add(metadataBehavior);
}
host.Open();
2. 采用元数据交换终结点发布元数据。
采用MEX终结点发布元数据，没有必要启用HTTP-GET选项，但是即使启用了也不会造成影响。
元数据交换终结点采用的契约为IMetadataExchange，WCF自动为服务宿主提供了该接口的实现。
采用配置方式：
<system.ServiceModel>
<services>
<service name="MyService" behaviorConfiguration = "MEXGET">
<host>
<baseAddresses>
<add baseAddress = "net.tcp://localhost:10000"/>
<add baseAddress = "net.pipe://localhost"/>
</baseAddresses>
</host>
<endpoint
address = "MEX"
binding = "mexTcpBinding"
contract = "IMetadataExchange"
/>
<endpoint
address = "MEX"
binding = "mexNamedPipeBinding"
contract = "IMetadataExchange"
/>
<endpoint
address = "http://localhost:10001/Mex"
binding = "mexHttpBinding"
contract = "IMetadataExchange"
/>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior name = "MEX">
<serviceMetadata/>
</behavior>
</serviceBehaviors>
</behaviors>
</system.ServiceModel>
采用编程方式：
BindingElement bindingElement = new TcpTransportBindingElement();
CustomBinding binding = new CustomBinding(bindingElement); Uri tcpBaseAddress = new Uri("net.tcp://localhost:10000");
ServiceHost host = new ServiceHost(typeof(MyService)); ServiceMetadataBehavior metadataBehavior;
metadataBehavior = host.Description.Behaviors.Find();
if(metadataBehavior == null)
{
metadataBehavior = new ServiceMetadataBehavior();
host.Description.Behaviors.Add(metadataBehavior);
}
host.AddServiceEndpoint(typeof(IMetadataExchange),binding,"MEX");
host.Open();