Question

I’m new to WCF and trying to get my first service running. I’m close but stuck on this problem.

In my interface definition file, I have this:

[ServiceContract(Namespace='http://mysite.com/wcfservices/2009/02')]            public interface IInventoryService     {         [OperationContract]         string GetInventoryName(int InventoryID);     } 

Then I have my class file (for the service) that inherits it:

   public class InventoryService : IInventoryService     {         // This method is exposed to the wcf service         public string GetInventoryName(int InventoryID)         {             return 'White Paper';         } 

Finally, in my Host project I have this:

    ServiceHost host = new ServiceHost(typeof(Inventory.InventoryService));     host.AddServiceEndpoint(typeof(Inventory.InventoryService), new NetTcpBinding(),         'net.tcp://localhost:9000/GetInventory');     host.Open(); 

Everything compiles fine, and when the host goes to add the service endpoint, it bombs with this: ‘The contract type Inventory.InventoryService is not attributed with ServiceContractAttribute. In order to define a valid contract, the specified type (either contract interface or service class) must be attributed with ServiceContractAttribute.’

I know I’m missing something simple here. I have the interface clearly marked as a service contract and there’s a reference to that project in the Host project.

Answer 1

ServiceHost host = new ServiceHost(typeof(Inventory.InventoryService)); host.AddServiceEndpoint(typeof(Inventory.InventoryService), new NetTcpBinding(),     'net.tcp://localhost:9000/GetInventory'); host.Open(); 

If your ServiceContract attribute is on the Interface not the concrete class, try the following:

ServiceHost host = new ServiceHost(typeof(Inventory.InventoryService)); host.AddServiceEndpoint(typeof(Inventory.IInventoryService), new NetTcpBinding(),     'net.tcp://localhost:9000/GetInventory'); host.Open();