C#委托

//定义委托

//delegate

public delegate void GreetingDelegate(string name);

public class Person {

public static void EnglishSpeeking(string name) {

Console.WriteLine("Come Honey"+name);

}

public static void ChineseSpeeking(string name) {

Console.WriteLine("你好"+name);

}

}

//定义委托

public delegate void Buy(string name);

public class Man {

public static void BuyChePiao (string name){

Console.WriteLine(name+"买车票");

}

public static void BuyMovePiao(string name)

{

Console.WriteLine(name + "买电影票");

}

public static void BuySome(string name, Buy buy1)

{

//相当于buy1绑定了上面俩脚本

//buy1 = Man.BuyChePiao;

//buy1 += Man.BuyMovePiao;

buy1(name);

}

}

//声明匿名委托

public delegate void NiMing(string str);

//示例

public delegate string Upper(string a);

//lanbda表达式

//声明委托

public delegate void Action(int a);

class Program

{

static void Main(string[] args)

{

/*

//合并委托

//定义一个委托类型的greetingDelegate

GreetingDelegate greetingDelegate;

//给委托绑定了方法

greetingDelegate = Person.EnglishSpeeking;

//绑定多个方法使用+=

greetingDelegate += Person.ChineseSpeeking;

//绑定多个方法使用-=

greetingDelegate -= Person.ChineseSpeeking;

//调用委托

greetingDelegate("幺儿");

*/

//利用委托实现叫小明买完车票之后又买电影票

Buy buy;

buy = Man.BuyChePiao;

buy += Man.BuyMovePiao;

//类调用方法（将委托绑定的方法作为参数进行了传递）

Man.BuySome("小明",buy);

//delegate匿名委托

//匿名委托方法只用到一次

NiMing nm = delegate (string str)

{

Console.WriteLine("匿名委托：" + str);

};

nm("委托的其他格式！");

Upper up = delegate (string a)

{

return a.ToUpper();

};

Console.WriteLine(up("yaoer"));

//lambda表达式

//格式:()=>{要执行的方法};

Action action = (int b) =>

{

b = b * 10;

Console.WriteLine(b);

};

//调用：

action(52);

}

}