Question

This is my first WCF Server:

using System;
using System.Collections.Generic;
using System.Linq;
using System.ServiceModel;
using System.Text;

namespace Myns.MBClient
{

    [ServiceContract]
    public interface IManagementConsole
    {
        [OperationContract]
        ConsoleData GetData(int strategyId);
    }

    [ServiceContract]
    public class ConsoleData
    {
        private int currentIndicator;

        [OperationContract]
        public double GetCurrentIndicator()
        {
            return currentIndicator;
        }

        public void SetCurrentIndicator(int currentIndicator)
        {
            this.currentIndicator = currentIndicator;
        }
    }

    class ManagementConsole : IManagementConsole
    {
        public ConsoleData GetData(int strategyId)
        {
            ConsoleData data = new ConsoleData();
            data.SetCurrentIndicator(33);
            return data;
        }
    }

}

In client I just call pipeProxy.GetData(0).GetCurrentIndicator()

Why program prints 0 while it supposed to print 33?

Client code (which I think has no problems):

using System;
using System.Collections.Generic;
using System.Linq;
using System.ServiceModel;
using System.Text;
using Commons;
using myns.MBClient;

namespace myns.MBClientConsole
{
    class Program
    {
        static void Main(string[] args)
        {
            ChannelFactory<IManagementConsole> pipeFactory =
                new ChannelFactory<IManagementConsole>(
                    new NetNamedPipeBinding(),
                    new EndpointAddress(
                        "net.pipe://localhost/PipeMBClientManagementConsole"));

            IManagementConsole pipeProxy =
              pipeFactory.CreateChannel();

            while (true)
            {
                string str = Console.ReadLine();
                Console.WriteLine("pipe: " +
                  pipeProxy.GetData(0).GetCurrentIndicator());
            }
        }
    }
}

Answer 1

If you create your own complex type to use with WCF you have to add a DataContract attribute instead of a ServiceContract, and you should use fields/properties that are decorated with DataMember. And do yourself a favor and use plain DTOs (DataTransferObjects – Objects with only fields/properties but no behavior):

[DataContract]
public class ConsoleData
{
    [DataMember]
    public int CurrentIndicator {get;set;}
}

You can find more on this here