WCF发现和DataService V3

我想为我的Data Services v3公开发现 endpoints （包括TCP和UDP），并允许从客户端发现服务并在另一个应用程序中发现它们 . 发现的要点是在客户端获取服务 endpoints 地址 .

我试图调整Microsoft为WCF Discovery提供的示例，但到目前为止，我未能实现我的目标 . 我在服务器端创建了一个自定义数据服务主机工厂：

public class CustomDataServiceHostFactory : System.Data.Services.DataServiceHostFactory
{
    protected override System.ServiceModel.ServiceHost CreateServiceHost(Type serviceType, Uri[] baseAddresses)
    {
        var serviceHost = base.CreateServiceHost(serviceType, baseAddresses);

        EndpointDiscoveryBehavior endpointDiscoveryBehavior = new EndpointDiscoveryBehavior();

        // Create XML metadata to add to the service endpoint
        XElement endpointMetadata = new XElement(
            "Root",
            new XElement("Information", "This endpoint is Data Service v3!"),
            new XElement("Time", System.DateTime.Now.ToString("MM/dd/yyyy HH:mm")));

        // Add the XML metadata to the endpoint discovery behavior.
        endpointDiscoveryBehavior.Extensions.Add(endpointMetadata);

        //may be this is not the safest way to set the behaviour
        foreach (var endpoint in serviceHost.Description.Endpoints)
        {
            endpoint.Behaviors.Add(endpointDiscoveryBehavior);
        }

        // Make the service discoverable over UDP multicast
        serviceHost.Description.Behaviors.Add(new ServiceDiscoveryBehavior());
        serviceHost.AddServiceEndpoint(new UdpDiscoveryEndpoint());

        return serviceHost;
    }
}

在客户端，我尝试了以下代码：

DiscoveryClient discoveryClient = new DiscoveryClient(new UdpDiscoveryEndpoint());

// Find service endpoints    
// ServiceReference.DataModel is the generated class for the Data Service client proxy       
FindCriteria findCriteria = new FindCriteria(typeof(ServiceReference.DataModel));
findCriteria.Duration = TimeSpan.FromSeconds(30);

FindResponse findResponse = discoveryClient.Find(findCriteria);

// Check to see if endpoints were found & print the XML metadata in them.
if (findResponse.Endpoints.Count > 0)
{
    foreach (XElement xElement in findResponse.Endpoints[0].Extensions)
    {
        Console.WriteLine("Printing Metadata from ServiceEndpoint:");
        Console.WriteLine("Endpoint Information: " + xElement.Element("Information").Value);
        Console.WriteLine("Endpoint Started at Time: " + xElement.Element("Time").Value);
        Console.WriteLine();
    }
}

不幸的是，这不起作用 . 我得到InvalidOperationException：

尝试获取DataModel的 Contract 类型，但该类型不是ServiceContract，也不继承ServiceContract .

如果我朝着正确的方向前进，我需要一种方法来表达发现的服务 Contract 的类型 . 太糟糕了我不确定它是否会像普通的WCF发现一样工作......

请分享您的想法，甚至更好 - 工作解决方案 .