C#委托delegate使用方法

分别创建Cat类，Mouse类，People类，最后再main函数中调用运行，参考代码如下：

• Cat

public class Cat
{
    //定义猫叫事件
    public event CatCallEvnetHandleer CatCall;
    public void OnCatCall()
    {
        Console.WriteLine("猫叫了一声");
        if(CatCall != null)
        {
            CatCall?.Invoke();
        }
    }
}

• Mouse

public class Mouse
{
    public void MouseRun()
    {
        Console.WriteLine("老鼠跑了");
    }
}

• People

public class People
{
    public void WakeUp()
    {
        Console.WriteLine("主人醒了");
    }
}

• Main

public delegate void CatCallEvnetHandleer();
class Program
{
    static void Main(string[] args)
    {
        Cat cat = new Cat();
        Mouse mouse = new Mouse();
        People people = new People();

        cat.CatCall += new CatCallEvnetHandleer(mouse.MouseRun);
        cat.CatCall += new CatCallEvnetHandleer(people.WakeUp);
        cat.OnCatCall();

        Console.ReadKey();

    }
}