在添加服务引用时

小心你输入的命名空间:

你应该把它附加到你的接口名称:

<client>
  <endpoint address="http://192.168.100.87:7001/soap/IMySOAPWebService"
            binding="basicHttpBinding" 
            contract="MyNamespace.IMySOAPWebService" />
</client>

There seem to be several ways to create/fix this issue. For me, the CRM product I am using was written in native code and is able to call my .NET dll, but I run into the configuration information needing to be at/above the main application. For me, the CRM application isn't .NET, so I ended up having to put it in my machine.config file (not where I want it). In addition, since my company uses Websense I had a hard time even adding the Service Reference due to a 407 Proxy Authentication Required issue, that to required a modification to the machine.cong.

代理解决方案:

为了让WCF服务引用工作，我必须从我的DLL的app.config复制信息到主应用程序配置(但对我来说是machine.config)。我还必须将端点信息复制到同一个文件中。一旦我这么做了，它就开始为我工作了。

“如果在类库中调用服务，并从另一个项目调用类库，则可能出现此错误。”

在这种情况下，如果是winapp或web，则需要将WS配置设置包含到主项目app.config中。配置如果它是一个web应用程序。这是即使与PRISM和WPF/Silverlight的方式。

对使用服务的非库应用程序进行单元测试可能会导致此问题。

The information that others have entered addresses the root cause of this. If you are trying to write automated test cases and the unit you are testing will actually invoke the service interface, you need to add the service reference to the test project. This is a flavor of the application using library type of error. I did not immediately realize this though because my code that consumes the interface is not in a library. However, when the test actually runs it will be running from the test assembly, not the assembly under test.

向单元测试项目添加服务引用解决了我的问题。

不要将服务客户端声明行作为类字段， 中使用的每个方法都创建实例。 这样问题就会解决。如果您将服务客户端实例创建为类字段，则会出现设计时错误!

当你在类文件中引用服务时，这里有几个响应可以找到正确的解决方案:将服务配置信息复制到app.config web中。这些答案似乎都没有告诉你应该复制什么。让我们试着纠正一下。

下面是我从我的类库的配置文件复制到我的控制台应用程序的配置文件中，为了解决这个疯狂的错误，我写了一个名为“TranslationServiceOutbound”的服务。

你基本上想要系统内的一切。serviceModel部分:

  <system.serviceModel>
<bindings>
  <basicHttpBinding>
    <binding name="BasicHttpBinding_ITranslationServiceOutbound" />
  </basicHttpBinding>
</bindings>
<client>
  <endpoint address="http://MyHostName/TranslationServiceOutbound/TranslationServiceOutbound.svc"
    binding="basicHttpBinding" bindingConfiguration="BasicHttpBinding_ITranslationServiceOutbound"
    contract="TranslationService.ITranslationServiceOutbound" name="BasicHttpBinding_ITranslationServiceOutbound" />
</client>