c# - C#中如何订阅其他类(class)的事件？

Question

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使用react。

我该怎么做？

请注意，表单和自定义类是单独的类。

Answer 1

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.....
    }
}