WCF，找不到合同名称“ IMetadataExchange”

debugcn 发表于 Dev

Omer K

我只是在应用本文中的代码，

http://msdn.microsoft.com/zh-CN/library/ms733766(v=vs.110).aspx

我没有进行任何更改，但是从IIS浏览后，我得到了

The contract name 'IMetadataExchange' could not be found in the list of contracts implemented by the service CalculatorService.  Add a ServiceMetadataBehavior to the configuration file or to the ServiceHost directly to enable support for this contract

可能出了什么问题，我只是做了链接。我寻找答案。我可以通过添加

  <behaviors>
      <serviceBehaviors>
        <behavior name="CalculatorServiceBehavior">
          <serviceMetadata httpGetEnabled="True"/>
          <serviceDebug includeExceptionDetailInFaults="False" />
        </behavior>
      </serviceBehaviors>
    </behaviors>

但我不想添加此内容，因为在查看链接时，msdn不会添加。这是什么错误？

这是我的配置文件：

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <system.serviceModel>
    <services>
      <service name="Microsoft.ServiceModel.Samples.CalculatorService">

        <!-- This endpoint is exposed at the base address provided by host:                                        http://localhost/servicemodelsamples/service.svc  -->
        <endpoint address=""
                  binding="wsHttpBinding"
                  contract="Microsoft.ServiceModel.Samples.ICalculator" />

        <!-- The mex endpoint is explosed at http://localhost/servicemodelsamples/service.svc/mex -->
        <endpoint address="mex"
                  binding="mexHttpBinding"
                  contract="IMetadataExchange" />
      </service>
    </services>
  </system.serviceModel>

</configuration>

阿里雷扎

我找不到任何官方文件，证明之间的关系<serviceMetadata>和IMetadataExchange。

只是示例中的以下注释<serviceMetadata>：

<!-- the mex endpoint is exposed at http://localhost/servicemodelsamples/service.svc/mex 
To expose the IMetadataExchange contract, you 
must enable the serviceMetadata behavior as demonstrated below -->

它说“您必须”，但没有参考。

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