program.cs

这是.net2005学习不可缺少的教程

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

namespace EventDemo
{
    public delegate void ComputeSalaryCallback(String empID, Double salary);

    public class Employee
    {
        public event ComputeSalaryCallback OnComputeSalaryDone;

        String m_EmpID;
        Double m_BaseSalary;

        public Employee():this("001",1000){}

        public Employee(String empID, Double baseSalary)
        {
            m_EmpID = empID;
            m_BaseSalary = baseSalary;
        }

        public virtual Double ComputeSalary()
        {
            OnComputeSalaryDone(m_EmpID, m_BaseSalary);
            return m_BaseSalary;
        }
    }

    class Program
    {
        public static void SalaryHandler(String empID, Double salary)
        {
            Console.WriteLine("Employee: Employee ID = {0}, Salary = {1}",empID, salary);
        }

        static void Main(string[] args)
        {
            Employee e1 = new Employee("001", 5000);
            e1.OnComputeSalaryDone += new ComputeSalaryCallback(SalaryHandler);
            e1.ComputeSalary();
        }
    }
}