C#:关于Action和Func以及Eventhandler的区别

三者都是对委托的简写，少了部分委托的声明

Action相当于可以带很多参数的无返回值的委托

public Action<string, int> action;
     public void Action1(string str,int a)
    {
        print(str + a.ToString()); 
    }
        action = Action1;

 

Func可以带很多参数，但是必须带返回值的委托

Func func；

    public Func<string , bool> func;
    public bool Func1(string str)
    {
        print(str);

        return true;
    }

EventHandler可以带一整个参数列表，无返回值

    public event EventHandler showStudentInfo;
    StudentClass student = new StudentClass("12","lp","man");

    private void Test(EventHandler eventHandler)
    {
        eventHandler(this ,student);
    }
//其中 写类对参数列表类进行继承
public class StudentClass : EventArgs
{
    public string age;
    public string name;
    public string sex;

    public StudentClass(string _age,string _name,string _sex)
    {
        age = _age;
        name = _name;
        sex = _sex;
    }