Why "no elements matching the key were found in the configuration element collection"?

Question

I am programmatically creating a named pipe WCF service and client.

The service code does:

serviceHost = new ServiceHost(typeof(CFCAccessPointService), new Uri(Names.Address));
serviceHost.AddServiceEndpoint(typeof (ICfcAccessPoint), new NetNamedPipeBinding(Names.Binding), Names.Contract);
serviceHost.Open();

The client code:

var ctx = new InstanceContext(new StatusHandler());
s_proxy = new DuplexChannelFactory<ICfcAccessPoint>(ctx, new NetNamedPipeBinding(Names.Binding), new EndpointAddress(Names.Address));

with

public static class Names
{
    public const string Address = "net.pipe://localhost/CFC/Plugins/GuestAccessService";
    public const string Binding = "netNamedPipeBinding_ICfcAccessPoint";
    public const string Contract = "GuestAccessClientServerInterface.ICfcAccessPoint";
}

to ensure the client and service stay the same.

But if I drop the Names.Binding so that no binding configuration is specified, I get the error that no listener could be found at the endpoint. If I include it, I get "no elements matching the key were found in the configuration element collection"...

I am not using .config files.

What is still missing?

Answer 1

The binding was fine, either way, and in fact needed no argument at all.

The trouble was with the contract. When I changed to code to:

public static class Names
{
    public const string Address = "net.pipe://localhost/CFC/Plugins/GuestAccessService/";
    public const string Binding = "";
    public const string Contract = "CfcAccessPoint";
}

and on the service side:

this.serviceHost.AddServiceEndpoint(typeof(ICfcAccessPoint), new NetNamedPipeBinding(), Names.Contract);

and on the client side:

var ctx = new InstanceContext(this);
proxy = new DuplexChannelFactory<ICfcAccessPoint>(ctx, new NetNamedPipeBinding(), new EndpointAddress(Names.Address) + Names.Contract);

then things worked fine. The service just names the pipe; the client adds the address to the pipe name.

Voilá!