为什么 IMetadataExchange 不可见？
我创建了使用 IIS 6 (Windows XP) 托管的 WCF 服务：
<system.serviceModel>
<behaviors>
<serviceBehaviors>
<behavior name="myServiceBehaviors">
<serviceMetadata httpGetEnabled="true"/>
<serviceDebug includeExceptionDetailInFaults="false"/>
</behavior>
</serviceBehaviors>
</behaviors>
<services>
<service name="Namespace.Class" behaviorConfiguration="myServiceBehaviors">
<endpoint contract="IMetadataExchange" binding="mexHttpBinding" address="mex" />
</service>
</services>
<serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
</system.serviceModel>
我使用 Visual Studio 2010 创建了虚拟目录 (MyVirtualFolder)，当我将浏览器指向“http://localhost/MyVirtualFolder/MyService.svc”时 我收到错误页面，告诉我我应该打开元数据交换接口，并说明如何执行此操作以及如何修改我的配置文件。我仔细检查了一下，我的配置等于 html 页面建议的配置。
为什么IMetaDataExchange接口不可用？
先感谢您！
I have created WCF Service that is hosted with IIS 6 (Windows XP):
<system.serviceModel>
<behaviors>
<serviceBehaviors>
<behavior name="myServiceBehaviors">
<serviceMetadata httpGetEnabled="true"/>
<serviceDebug includeExceptionDetailInFaults="false"/>
</behavior>
</serviceBehaviors>
</behaviors>
<services>
<service name="Namespace.Class" behaviorConfiguration="myServiceBehaviors">
<endpoint contract="IMetadataExchange" binding="mexHttpBinding" address="mex" />
</service>
</services>
<serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
</system.serviceModel>
I have created virtual directory (MyVirtualFolder) with Visual Studio 2010 and when I point browser to "http://localhost/MyVirtualFolder/MyService.svc"
I get error page that tells me that I should turn on interface for metadataExchange with instructions how to do that, how I shall modify my configuration file. I double checked that and my config is equal to one that was proposed by html page.
Why does IMetaDataExchange interface is unavailable?
Thank you in advance!
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尝试使用
如果您在 IIS 中托管 Web 服务，则您将拥有一个 *.svc 文件。您不需要端点来获取元数据、删除端点，一切都会正常工作。
Try
<serviceMetadata />instead of<serviceMetadata httpGetEnabled="true"/>.If you host a web service in IIS, you have an *.svc file. You don't need an endpoint to get metadata, delete the endpoints, and all will work fine..
从您的
IMetadataExchange端点中删除address="mex"。此外，您的服务本身没有实际的端点。
如果可能，请尝试使用 SvcConfigEditor，WCF 配置编辑器（Windows 的一部分） SDK）来获取工作服务和客户端配置。
Remove
address="mex"from yourIMetadataExchangeendpoint.Also there's no actual endpoint for your service itself.
If possible, try using SvcConfigEditor, the WCF configuration editor (part of Windows SDK) to get a working service and client configuration.
最后我找到了原因：
Finally I found out what was the reason:
<service name="Namespace.Class">pointed to wrong class :(