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:一个引发事件的自定义类.我希望在表单中使用此事件并对其做出反应.

A simple scenario: a custom class that raises an event. I wish to consume this event inside a form and react to it.

我该怎么做?

注意表单和自定义类是独立的类.

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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