同样的WCF服务程序，使用不同的宿主，效果不一样，请大神帮帮忙，谢谢

Question

//契约的实现
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace TickService
{
public class TickService:ITicketService
{
//Tick tick = Tick.tick;
Tick tick = new Tick();
public void AddTick(int i)
{
tick.HowMany += i;
}

    public int buyTickets(int i)
    {
        if (tick.HowMany > i)
        {
            tick.HowMany=tick.HowMany-i;
            return i;
        }
        else
        {
            return 0;
        }
    }

    public int GetRemainingNum()
    {
        return tick.HowMany;
    }
}

}
//契约
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;
using System.Threading.Tasks;

namespace TickService
{
[ServiceContract]
public interface ITicketService
{
[OperationContract]
void AddTick(int i);

    [OperationContract]
    int buyTickets(int i);

    [OperationContract]
    int GetRemainingNum();
}
[DataContract]
public class Tick
{

    int howMany = 10;
    public static Tick tick = new Tick();


    [DataMember]
    public int HowMany
    {
        get { return howMany; }
        set { howMany = value; }
    }
}

}

//在WPF中调用的实现

            ServiceHost host = new ServiceHost(typeof(TickService.TickService));
    public MainWindow()
    {

        InitializeComponent();
        //host.Open();

    }

    private void Button_Click(object sender, RoutedEventArgs e)
    {



        host.Open();
        info.Content = "Successful!!!";


    }

    private void Button_Click_1(object sender, RoutedEventArgs e)
    {
        host.Close();
        info.Content = "Closed!!!";
    }

具体就是，使用WPF作为宿主时，订票后，总票数不变，通过调试，发现，每次都重新执行了
Tick tick = new Tick();
使用控制台作为宿主的话，就不会发生这种情形

Answer 1

你是不是在wpf中打开窗口关闭又打开？那样会产生新的service对象。你应该放在一个静态类中。