问WCF4宿主在IIS中，WSDL: bindingNamespace永远不会被读取

EN

    <behaviors>
        <endpointBehaviors>
            <behavior name="Secure" />
        </endpointBehaviors>
        <serviceBehaviors>
            <behavior name="MetadataBehavior">
                <serviceMetadata httpsGetEnabled="true" />
                <serviceDebug includeExceptionDetailInFaults="true" />
            </behavior>
        </serviceBehaviors>
    </behaviors>
    <serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
    <services>
        <service name="Company.Services.Implementation.Service" behaviorConfiguration="MetadataBehavior">
            <endpoint address="" behaviorConfiguration="Secure"
                      binding="basicHttpBinding" bindingConfiguration="httpsBinding" bindingNamespace="http://services.company.com"
                      contract="Company.Services.Interfaces.IService" />
            <endpoint address="mex" behaviorConfiguration="Secure"
                      binding="mexHttpsBinding" bindingConfiguration="httpsBinding" bindingNamespace="http://services.company.com"
                      contract="IMetadataExchange" />
        </service>
    </services>
    <bindings>
        <basicHttpBinding>
            <binding name="httpsBinding">
                <security mode="Transport" />
            </binding>
        </basicHttpBinding>
        <mexHttpsBinding>
            <binding name="httpsBinding" />
        </mexHttpsBinding>
    </bindings>

/// <summary>
/// Attribute which will add a binding namespace to every endpoint it's used in.
/// </summary>
[AttributeUsage(AttributeTargets.Class)]
public sealed class BindingNamespaceBehaviorAttribute : Attribute, IServiceBehavior
{
    /// <summary>
    /// The binding namespace;
    /// </summary>
    private readonly string bindingNamespace;

    /// <summary>
    /// Initializes a new instance of the <see cref="BindingNamespaceBehaviorAttribute"/> class.
    /// </summary>
    /// <param name="bindingNamespace">The binding namespace.</param>
    public BindingNamespaceBehaviorAttribute(string bindingNamespace)
    {
        this.bindingNamespace = bindingNamespace;
    }

    /// <summary>
    /// Gets the binding namespace.
    /// </summary>
    /// <value>The binding namespace.</value>
    public string BindingNamespace
    {
        get
        {
            return this.bindingNamespace;
        }
    }

    /// <summary>
    /// Provides the ability to pass custom data to binding elements to support the contract implementation.
    /// </summary>
    /// <param name="serviceDescription">The service description of the service.</param>
    /// <param name="serviceHostBase">The host of the service.</param>
    /// <param name="endpoints">The service endpoints.</param>
    /// <param name="bindingParameters">Custom objects to which binding elements have access.</param>
    public void AddBindingParameters(
        ServiceDescription serviceDescription,
        ServiceHostBase serviceHostBase,
        Collection<ServiceEndpoint> endpoints,
        BindingParameterCollection bindingParameters)
    {
    }

    /// <summary>
    /// Provides the ability to change run-time property values or insert custom extension objects such as error
    /// handlers, message or parameter interceptors, security extensions, and other custom extension objects.
    /// </summary>
    /// <param name="serviceDescription">The service description.</param>
    /// <param name="serviceHostBase">The host that is currently being built.</param>
    public void ApplyDispatchBehavior(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
    {
    }

    /// <summary>
    /// Provides the ability to inspect the service host and the service description to confirm that the service
    /// can run successfully.
    /// </summary>
    /// <param name="serviceDescription">The service description.</param>
    /// <param name="serviceHostBase">The service host that is currently being constructed.</param>
    public void Validate(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
    {
        if (serviceHostBase == null)
        {
            throw new ArgumentNullException("serviceHostBase");
        }

        foreach (var endpoint in serviceHostBase.Description.Endpoints)
        {
            endpoint.Binding.Namespace = this.bindingNamespace;
        }
    }
}

[ServiceBehavior(Namespace = "http://schemas.vevy.com/Printing")]
[BindingNamespaceBehavior("http://schemas.vevy.com/Printing")]
public class LabelsService : ILabelsService
{
    // ...
}