[Mono-dev] help: is AnnouncementService working on Mono

[Gerjan Dokter]

Hello,

My name is Gerjan, and i am working on a Domotica Project which is
implemented on a DreamPlug(Linux Debian).

For this project i am using WCF Services which is a part of the .NET
Framework.

My question is if the full functionality of WCF Services is implemented in
Mono. A more specific question is if the "AnnouncementService"
functionality is added to mono. Because when i want to add an
ServiceEndpoint(new UdpAnnouncementEndpoint) to my Servichost with
servicetype 'announcementservice', the program is returning an error, which
is:

*Unhandled Exception: System.NullReferenceException: Object reference not
set to an instance of an object*
*at System.ServiceModel.Channels.TextMessageEncoder.FillActionContentType*

I am looking forward to your answer,

Sincerly,

Gerjan

below my  code:

   class Program
   {
       static void Main(string[] args)
       {
           // Create an AnnouncementService instance
           AnnouncementService announcementService = new
AnnouncementService();

           // Subscribe the announcement events
           announcementService.OnlineAnnouncementReceived += OnOnlineEvent;
           announcementService.OfflineAnnouncementReceived +=
OnOfflineEvent;

           // Create ServiceHost for the AnnouncementService
           using (ServiceHost announcementServiceHost = new
ServiceHost(announcementService))
           {
               // Listen for the announcements sent over UDP multicast
               announcementServiceHost.AddServiceEndpoint(new
UdpAnnouncementEndpoint());
               announcementServiceHost.Open();
               Console.WriteLine("Press <ENTER> to terminate.");
               Console.ReadLine();
               announcementServiceHost.Close();
           }
       }


       static void OnOnlineEvent(object sender, AnnouncementEventArgs e)
       {
           Console.WriteLine("Received an online announcement from
{0}", e.EndpointDiscoveryMetadata.Address);
           Console.WriteLine("Received an online announcement from {0}",
e.EndpointDiscoveryMetadata.ContractTypeNames.ToString());
           Console.WriteLine("Received an online announcement from {0}",
e.EndpointDiscoveryMetadata.ListenUris.ToString());
           Console.WriteLine("Received an online announcement from {0}",
e.EndpointDiscoveryMetadata.Version);
       }

       static void OnOfflineEvent(object sender, AnnouncementEventArgs e)
       {
           Console.WriteLine("Received an offline announcement from {0}",
e.EndpointDiscoveryMetadata.Address);
           Console.WriteLine("Received an offline announcement from
{0}", e.EndpointDiscoveryMetadata.ContractTypeNames.ToString());
           Console.WriteLine("Received an offline announcement from {0}",
e.EndpointDiscoveryMetadata.ListenUris.ToString());
           Console.WriteLine("Received an offline announcement from {0}",
e.EndpointDiscoveryMetadata.Version);
       }
   }
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