如何在c＃中订阅其他类的事件？ [英] How to subscribe to other class' events in c#?

问题描述

一个简单的场景：引发事件的自定义类。我希望在一个表单内消费这个事件并作出反应。我怎么做？

A simple scenario: a custom class that raises an event. I wish to consume this event inside a form and react to it. How do I do that? Code examples, please!

请注意，表单和自定义类是单独的类。

Note that the form and custom class are separate classes.

推荐答案

        public class EventThrower
        {
            public delegate void EventHandler(object sender, EventArgs args) ;
            public event EventHandler ThrowEvent = delegate{};

            public void SomethingHappened()
            {
                ThrowEvent(this, new EventArgs());
            }
        }

        public class EventSubscriber
        {
            private EventThrower _Thrower;

            public EventSubscriber()
            {
                _Thrower = new EventThrower();
                //using lambda expression..could use method like other answers on here
                _Thrower.ThrowEvent += (sender, args) => { DoSomething(); };
            }

            private void DoSomething()
            {
               //Handle event.....
            }
        }

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