.net - 在服务实现的合约列表中找不到 IMetaDataExchange

Question

我在网上搜索了这个错误的解决方案，但我发现的一切都表明我所拥有的都是正确的。

也许有人可以看看并发现一个我看不到的明显错误。

我有一个 Windows 服务，托管两个契约(Contract):

IConfigurationService

IConfigurationAdminService

管理服务继承自标准服务，因为我希望两个契约(Contract)都实现基本方法。

问题是我可以很好地托管服务，直到我尝试添加 MEX。

然后我得到以下异常:

The contract name 'IMetaDataExchange' could not be found in the list of contracts implemented by the service 'ConfigurationWCFService'.

这是我的配置，一切都由配置配置，没有通过代码完成。

<system.serviceModel>
    <bindings>
      <netTcpBinding>
        <binding name="tcpBinding" maxBufferSize="2147483647" maxReceivedMessageSize="2147483647">
          <readerQuotas maxStringContentLength="2147483647" maxArrayLength="2147483647" />
          <security mode="None" />
        </binding>
      </netTcpBinding>
    </bindings>
    <services>
      <service behaviorConfiguration="serviceBehavior" name="BrightsideGroup.Repa.Configuration.ConfigurationWCFService">
        <endpoint address="ConfigurationService" binding="netTcpBinding"
          bindingConfiguration="tcpBinding" name="tcpConfiguration" contract="BrightsideGroup.Repa.Configuration.IConfigurationWCFService" />
        <endpoint binding="mexHttpBinding" address="mex" name="mex" contract="IMetaDataExchange" />
        <host>
          <baseAddresses>
            <add baseAddress="net.tcp://GD01316:9123/Repa" />
            <add baseAddress="http://GD01316:8123/Repa" />
          </baseAddresses>
        </host>
      </service>
      <service behaviorConfiguration="serviceBehavior" name="BrightsideGroup.Repa.Configuration.ConfigurationWCFAdminService">
        <endpoint address="ConfigurationAdminService" binding="netTcpBinding"
          bindingConfiguration="tcpBinding" name="tcpConfigurationAdmin"
          contract="BrightsideGroup.Repa.Configuration.IConfigurationAdminWCFService" />
        <endpoint binding="mexHttpBinding" address="mex" name="mex" contract="IMetaDataExchange" />
        <host>
          <baseAddresses>
            <add baseAddress="net.tcp://GD01316:9124/Repa" />
            <add baseAddress="http://GD01316:8124/Repa" />
          </baseAddresses>
        </host>
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior name="serviceBehavior">
          <serviceMetadata httpGetEnabled="true" />
        </behavior>
      </serviceBehaviors>
    </behaviors>
  </system.serviceModel>

Answer 1

您的大小写不正确 - WCF 配置区分大小写

 <endpoint address="mex"
              binding="mexHttpBinding"
              contract="IMetadataExchange" />

请注意，IMetadataExchange 中的“D”没有大写您可以仔细检查 syntax on MSDN .