委托（续2）

⑤手写标准事件

老师留作业 学生做作业, 老师再留 学生咒骂

  public class CustomEvent
    {
        public static void  show() {
            student s = new student()
            {
                id = 99,
                Name = "小明"
            };
            Console.WriteLine($"{s.Name}的作业数量{s.HomeWorkCount}");
            s.studentHomeWorkToomuch += new TeacherInfo().addHomeWork;
            s.studentHomeWorkToomuch += new StudentInfo().doHomeWork;
            s.HomeWorkCount = 5;
            Console.WriteLine($"{s.Name}的作业数量{s.HomeWorkCount}");



        }
        /// <summary>
        /// 订户:关注事件,事件触发后,自己做出相应的动作
        /// </summary>
        public class StudentInfo {
            public void doHomeWork(object s,EventArgs e) {
                Console.WriteLine("***********学生的反应********************");
                student stu = (student)s;
                HomeWorkEventArgs homeWorkEventArgs = (HomeWorkEventArgs)e;
                Console.WriteLine($"学生姓名:{stu.Name}");
                Console.WriteLine($"学生作业完成数量:{homeWorkEventArgs.finishedCont}");
                Console.WriteLine($"学生未完成作业数量:{homeWorkEventArgs.WillfinishCont}");
                Console.WriteLine($"{stu.Name} : 老师你睡了吗?!");
                Console.WriteLine("*******************************");

            }
        }
        /// <summary>
        /// 订户:关注事件,事件触发后,自己做出相应的动作
        /// </summary>
        public class TeacherInfo
        {
            public void addHomeWork(object s, EventArgs e)
            {
                Console.WriteLine("***********老师的反应********************");
                Console.WriteLine("没有写完,放学别走");
                Console.WriteLine("*******************************");

            }
        }
        /// <summary>
        /// 事件的发布者者,发布是按在满足的情况下,触发事件
        /// </summary>
        public class student
        {
            public int id { get; set; }
            public string Name { get; set; }

            private int _homeWorkCount=2;//可以完成数量

            public int HomeWorkCount
            {
                get
                {
                    return _homeWorkCount;
                }
                set
                {
                    if (value > _homeWorkCount)
                    {
                        //触发
                        studentHomeWorkToomuch.Invoke(this, new HomeWorkEventArgs()
                        {
                            finishedCont = _homeWorkCount,
                            WillfinishCont = value - _homeWorkCount
                        });;
                    }
                    _homeWorkCount = value;
                }
            }
            public event EventHandler studentHomeWorkToomuch;
        }
        public class HomeWorkEventArgs : EventArgs
        {
            public int finishedCont { get; set; }
            public int WillfinishCont { get; set; }
        }


    }

//ps:不知道我有没有写清需求^_^