net.pipe service host in WPF app - wpf

Question

The contract:
[ServiceContract]
public interface IDaemonService {
[OperationContract]
void SendNotification(DaemonNotification notification);
}
The service:
[ServiceBehavior(InstanceContextMode = InstanceContextMode.Single)]
public class DaemonService : IDaemonService {
public DaemonService() {
}
public void SendNotification(DaemonNotification notification) {
App.NotificationWindow.Notify(notification);
}
}
In WPF app I do the following:
using (host = new ServiceHost(typeof (DaemonService), new[] {new Uri("net.pipe://localhost")})) {
host.AddServiceEndpoint(typeof (IDaemonService), new NetNamedPipeBinding(), "AkmDaemon");
host.Open();
}
This WPF app launches another app like this:
Task.Factory.StartNew(() => {
var tpm = new Process { StartInfo = { FileName = "TPM" } };
tpm.Start();
}
});
The app named TPM starts properly. Then I do attach to process in the debugging menu of Visual Studio and I see the client says that nobody is listening at the endpoint.
Here is the client:
[Export(typeof(DaemonClient))]
public class DaemonClient : IHandle<DaemonNotification> {
private readonly ChannelFactory<IDaemonService> channelFactory;
private readonly IDaemonService daemonServiceChannel;
public DaemonClient(IEventAggregator eventAggregator) {
EventAggregator = eventAggregator;
EventAggregator.Subscribe(this);
channelFactory = new ChannelFactory<IDaemonService>(new NetNamedPipeBinding(),
new EndpointAddress("net.pipe://localhost/AkmDaemon"));
daemonServiceChannel = channelFactory.CreateChannel();
}
public IEventAggregator EventAggregator { get; private set; }
public void Handle(DaemonNotification message) {
daemonServiceChannel.SendNotification(message); //Here I see that the endpoint //is not found
}
public void Close() {
channelFactory.Close();
}
}
EndpointNotFoundException There was no endpoint listening at "net.pipe://localhost/AkmDaemon"... blablabla

Answer 1

You are creating your ServiceHost in a using statement, so it is disposed right after the Open call. The Dispose call closes the ServiceHost.
using (host = new ServiceHost(...))
{
host.AddServiceEndpoint(...);
host.Open();
}
// ServiceHost.Dispose() called here
Just drop the using block.