发布服务元数据的方式有两种：一是基于HTTP-GET协议提供元数据，它是一种绝大多数平台都能支持的简单text-based协议；另一种是元数据交换终结点。
1.基于HTTP-GET协议
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<system.serviceModel>
<services>
<service name="HelloWCFService.HelloWCFService" behaviorConfiguration="metaExchange">
<host>
<baseAddresses>
<add baseAddress="http://localhost:8000/MyService"/>
</baseAddresses>
</host>
<endpoint address="HelloWCFService" binding="wsHttpBinding" contract="HelloWCFService.IHelloWCFService"/>
<!--<endpoint address="metaExchange" binding="mexHttpBinding" contract="IMetadataExchange"/>-->
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior name="metaExchange">
<serviceMetadata httpGetEnabled="true"/>
<!--<serviceMetadata/>-->
</behavior>
</serviceBehaviors>
</behaviors>
</system.serviceModel>
</configuration>
2.元数据交换终结点
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<system.serviceModel>
<services>
<service name="HelloWCFService.HelloWCFService" behaviorConfiguration="metaExchange">
<host>
<baseAddresses>
<add baseAddress="http://localhost:8000/MyService"/>
</baseAddresses>
</host>
<endpoint address="HelloWCFService" binding="wsHttpBinding" contract="HelloWCFService.IHelloWCFService"/>
<endpoint address="metaExchange" binding="mexHttpBinding" contract="IMetadataExchange"/>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior name="metaExchange">
<!--<serviceMetadata httpGetEnabled="true"/>-->
<serviceMetadata/>
</behavior>
</serviceBehaviors>
</behaviors>
</system.serviceModel>
</configuration>
