c# - WCF，找不到合约名称 'IMetadataExchange'

我只是应用本文中的代码，

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

我没有改变任何东西，但从 IIS 浏览后我得到

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

可能有什么问题，我只是按照链接做的。我寻找答案。我可以通过添加处理

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

但我不想添加这个，因为查看链接时 msdn 没有添加。错误是什么？

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>

最佳答案

我找不到任何说明 <serviceMetadata> 和 IMetadataExchange 之间关系的官方文件。

<serviceMetadata> 示例中的注释如下:

<!-- 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“你必须”，但还没有引用。

关于c# - WCF，找不到合约名称 'IMetadataExchange'，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/24874859/