c# 模拟qt的信号和槽的例子

用惯了qt的信号和槽，转到c#觉得很别扭。微软擅长把简单的东西设计的很复杂。不过吐吐也就习惯了。

下面的例子是一个公司里面有职员和hr,职员要加薪，发射信号给hr和公司的例子。同时用到了平行传递和向上传递信号。

using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;

namespace Delegate_And_Event
{
    public delegate void SalaryComputeEventHander(object sender, MyEventArgs e);

    public class  Company
    {
        public Employee emp1;
        public HumanResource hr1;


        public Company()
        {
            emp1 = new Employee();
            hr1 = new HumanResource();
            emp1.SalaryPromoted += new SalaryComputeEventHander(hr1.SalaryHandler);   //将具 体事件处理函数注册到事件中
            emp1.SalaryPromoted += new SalaryComputeEventHander(getEmployeeSlot);

        }

        public void getEmployeeSlot(object sender, MyEventArgs e)
        {
            Console.WriteLine("company respone:negtive");
        }

    }
    public class Employee
    {
        public event SalaryComputeEventHander SalaryPromoted;
       
        public  void OnSalaryCompute(MyEventArgs e) //触发事件的函数
        {
            if (SalaryPromoted != null)
            {
                Console.WriteLine("Employee ask for a promotion to 15000$");
                SalaryPromoted(this, e);
               
            }
        }
    }
    
    public class HumanResource
    {
        //具体的事件处理函数
        public void SalaryHandler(object sender, MyEventArgs e)
        {
            Console.WriteLine("HR response:Salary is {0},already high enough,will not be promoted", e._salary-3000);
        }
    }

    public class MyEventArgs : EventArgs
    {
        public readonly double _salary;
        public MyEventArgs(double salary)
        {
            this._salary = salary;
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            Company comp1 = new Company();           
            MyEventArgs e = new MyEventArgs(15000);
            comp1.emp1.OnSalaryCompute(e);
            Console.ReadKey();
        }
    }
}