callback does not implement interface member in wcf duplex binding RSS

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  veerendranad...

  Member

  46 Points

  65 Posts

  callback does not implement interface member in wcf duplex binding

  Feb 23, 2012 04:36 AM|LINK

  hi all

     i have created wcf application with duplex .i am getting error like "callback does not implement interface member ServiceReffernce1.IServiceCallback.BeginResult.code is like this

  public class callback  :ServiceReference1.IServiceCallback
  {
  	public callback()
  	{
  		//
  		// TODO: Add constructor logic here
  		//
  	}
      public static string info1;
      public void Result(string info)
      {
  
          info1 = info;
      }
  
  }
   InstanceContext ic = new InstanceContext(new callback());
          ServiceReference1.ServiceClient client = new ServiceReference1.ServiceClient(ic);
          client.PlaceOrder(int.Parse(TextBox1.Text));
          Timer1.Enabled = true;

• • Reply
  

  Qi Wu - MSFT

  Contributor

  5794 Points

  677 Posts

  Re: callback does not implement interface member in wcf duplex binding

  Feb 27, 2012 07:22 AM|LINK

  Hi,

  When you use the duplex contract you must implement the callback interface in the client side. Then it can receive messages from the service. You can refer to the below link about how to use the duplex contract and implement the callback interface.

  http://msdn.microsoft.com/en-us/library/ms731064.aspx

  Please mark the replies as answers if they help or unmark if not.
  If you have any feedback about my replies, please contact msdnmg@microsoft.com
  Microsoft One Code Framework
  
  • Marked as answer by Qi Wu - MSFT on Mar 01, 2012 01:43 AM