还有另一种方法我找到正确的endpointConfigurationName。

如下所示添加endpointConfigurationName

EservicesNew.ServiceClient eservicenew = new EservicesNew.ServiceClient("BasicHttpsBinding_IService");

如下所示找到endpointConfigurationName

添加Web Reference之后，打开配置。Svcinfo文件中生成的参考文件。

找到了两个端点，我使用了正确的端点bindingConfiguration值，即basichttpbinding_iservice

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。

“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。如果它是一个web应用程序，就配置它。这是即使使用PRISM和WPF/Silverlight的方式。”

是的，但是如果你不能改变主项目(例如Orchard CMS)，你可以在你的项目中保留WCF服务配置。

你需要用客户端生成方法创建一个服务助手:

public static class ServiceClientHelper
{
    public static T GetClient<T>(string moduleName) where T : IClientChannel
    {
        var channelType = typeof(T);
        var contractType = channelType.GetInterfaces().First(i => i.Namespace == channelType.Namespace);
        var contractAttribute = contractType.GetCustomAttributes(typeof(ServiceContractAttribute), false).First() as ServiceContractAttribute;

        if (contractAttribute == null)
            throw new Exception("contractAttribute not configured");

        //path to your lib app.config (mark as "Copy Always" in properties)
        var configPath = HostingEnvironment.MapPath(String.Format("~/Modules/{0}/bin/{0}.dll.config", moduleName)); 

        var configuration = ConfigurationManager.OpenMappedExeConfiguration(new ExeConfigurationFileMap { ExeConfigFilename = configPath }, ConfigurationUserLevel.None);
        var serviceModelSectionGroup = ServiceModelSectionGroup.GetSectionGroup(configuration);

        if (serviceModelSectionGroup == null)
            throw new Exception("serviceModelSectionGroup not configured");

        var endpoint = serviceModelSectionGroup.Client.Endpoints.OfType<ChannelEndpointElement>().First(e => e.Contract == contractAttribute.ConfigurationName);
        var channelFactory = new ConfigurationChannelFactory<T>(endpoint.Name, configuration, null);
        var client = channelFactory.CreateChannel();
        return client;
    }
}

并使用它:

using (var client = ServiceClientHelper.GetClient<IDefaultNameServiceChannel>(yourLibName)) {
                ... get data from service ...
            }

详见本文。

在我的情况下，我在启动项目和使用同名服务的项目中都添加了服务。它工作…

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。

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。