在WCF Design上需要帮助

Question

我有一个用C ++ COM +（服务器端）和VB6（客户端）编写的项目。我们决定使用C＃语言在WCF架构中重新设计项目。 作为我学习的一部分，我在WCF中创建了一个简单的测试项目，如下所示。 我们的想法是，当WBWindowsService启动时，它应该创建一个TASWB对象，然后运行一个线程来计算权重。因此，当客户端调用Getweight（）方法时，它应该能够接收线程计算的权重。 但是当我尝试时，我总是得到0这是初始值。所以我认为我缺少的是如何在WCF中管理对象。 请帮助。感谢

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.ComponentModel;
using System.ServiceModel;
using System.ServiceProcess;
using System.Configuration;
using System.Configuration.Install;

namespace TASWeighBridge
{
    public class WBWindowsService : ServiceBase
    {
        public ServiceHost serviceHost = null;
        private TASWB obj;
        public WBWindowsService()
        {
            // Name the Windows Service
            ServiceName = "WBWindowsService";


        }

        public static void Main()
        {
            ServiceBase.Run(new WBWindowsService());


        }

        // Start the Windows service.
        protected override void OnStart(string[] args)
        {
            if (serviceHost != null)
            {
                serviceHost.Close();
            }

            obj = new TASWB();
            obj.RunThread();
            // Create a ServiceHost for the CalculatorService type and 
            // provide the base address.
            serviceHost = new ServiceHost(typeof(TASWB));

            // Open the ServiceHostBase to create listeners and start 
            // listening for messages.
            serviceHost.Open();
        }

        protected override void OnStop()
        {
            if (serviceHost != null)
            {
                serviceHost.Close();
                serviceHost = null;
            }
        }
    }
}




using System.Text;
using System.Threading.Tasks;
using System.ComponentModel;
using System.ServiceModel;
using System.ServiceProcess;
using System.Configuration;
using System.Configuration.Install;


namespace TASWeighBridge
{
    // Define a service contract.
    [ServiceContract]
    public interface IWeighBridge
    {
        [OperationContract]
        double Getweight();
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.ComponentModel;
using System.ServiceModel;
using System.ServiceProcess;
using System.Configuration;
using System.Configuration.Install;
using System.Threading;
namespace TASWeighBridge
{
    // Implement the ICalculator service contract in a service class.
    public class TASWB : IWeighBridge
    {
        private double weight = 0;

        public void RunThread()
        {
            Thread T1 = new Thread(new ThreadStart(CalcWeight));
            T1.Start();
            //T1.Join();
        }


        private void CalcWeight()
        {
            Thread.Sleep(1000);
            weight = weight + 1;
        }
        public double Getweight()
        {
            return weight;
        }
    }
}

App.Config

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <system.serviceModel>    <services>
      <!-- This section is optional with the new configuration model
           introduced in .NET Framework 4. -->
      <service name="TASWeighBridge.TASWB"
               behaviorConfiguration="TASWBBehavior">
        <host>
          <baseAddresses>
            <add baseAddress="http://localhost:8000/TASWBService"/>
          </baseAddresses>
        </host>
        <!-- this endpoint is exposed at the base address provided by host: http://localhost:8000/TASWBService  -->
        <endpoint address=""
                  binding="wsHttpBinding"
                  contract="TASWeighBridge.IWeighBridge" />
        <!-- the mex endpoint is exposed at http://localhost:8000/TASWBService/mex -->
        <endpoint address="mex"
                  binding="mexHttpBinding"
                  contract="IMetadataExchange" />
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior name="TASWBBehavior">
          <serviceMetadata httpGetEnabled="true"/>
          <serviceDebug includeExceptionDetailInFaults="False"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
  </system.serviceModel>
</configuration>