WCF，合同名称'IMetadataExchange接口'找不到 [英] WCF, The contract name 'IMetadataExchange' could not be found

问题描述

我只是从这篇文章中应用代码，

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

我没有改变什么，但在IIS浏览后我得到

 合同名称IMetadataExchange接口无法通过该服务CalculatorService的实施合同的名单上找到。一个的ServiceMetadataBehavior添加到配置文件或直接ServiceHost的，使本合同
支持 

可能是什么错了，我就照链接。我搜索了一个答案。我可以通过添加

处理

 <&行为GT; 
< serviceBehaviors> 
<行为NAME =CalculatorServiceBehavior> 
< serviceMetadata httpGetEnabled =真/> 
< serviceDebug includeExceptionDetailInFaults =FALSE/> 
< /行为> 
< / serviceBehaviors> 
< /行为> 
  

但我不希望添加这个，因为在看MSDN链接时不添加。 ？什么是误差

下面是我的配置文件：

  < XML版本=1.0编码=UTF-8>？; 
<结构> 
< system.serviceModel> 
<服务和GT; 
<服务名称=Microsoft.ServiceModel.Samples.CalculatorService> 
 
<  - 此端点在由主机提供的基地址暴露：HTTP：//localhost/servicemodelsamples/service.svc  - > 
<端点地址=
结合=的wsHttpBinding
合同=Microsoft.ServiceModel.Samples.ICalculator/> 
 
<  -  MEX终结点是在HTTP explosed：//localhost/servicemodelsamples/service.svc/mex  - > 
<端点地址=MEX
结合=mexHttpBinding
合同=IMetadataExchange接口/> 
< /服务> 
< /服务> 
< /system.serviceModel> 
 
< /结构> 
  

解决方案

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

有关的 < serviceMetadata> ：

 <  -  MEX终结点暴露在http：//localhost/servicemodelsamples/service.svc/mex 
。要揭露IMetadataExchange接口的合同，你
必须启用serviceMetadata行为表现出如下 - > 
  

它说：你必须，但还没有参考。

I am simply applying code from this article,

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

I did not change anything but after browsing from IIS I am getting

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

What may be wrong, I did just as the link. I searched for an answer. I can handle by adding

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

But I do not want to add this because when looking at the link msdn does not add. What is the error?

Here is my config file:

<?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>

解决方案

I couldn't find any official document stating the relation between <serviceMetadata> and IMetadataExchange.

Just this comment inside the example for <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 -->

It says "You MUST", but no reference yet.

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