using System;
using System.Collections.Generic;
using System.Text;
namespace ConsoleApplication1
{
class 简单的委托实例
{
public static double Area(double Val)
{
return Val * 2;
}
public static double Scare(double Val)
{
return Val * Val;
}
}
class Test
{
public delegate double delegateTest(double dd);
static void Main()
{
//实例化了个委托数组,（一旦定义了委托类,就可以实例化它的实例）
delegateTest[] Operations =
{
//说明了委托的一种方式,把方法组合到数组
new delegateTest(简单的委托实例.Area),
new delegateTest(简单的委托实例.Scare)
};
for (int i = 0; i < Operations.Length; i++)
{
Console.WriteLine("Using Operations[{0}]", i);
Test MyTest = new Test();
//把委托传递给ProcessDelagate()这个方法,Operations[0]可以理解成delegateTest Operations =new delegateTest(简单的委托实例.Area);调用ProcessDelagate这个方法的时候Operations代理的方法是简单的委托实例.Area
MyTest.ProcessDelagate(Operations[i], 12.0);
MyTest.ProcessDelagate(Operations[i], 2.0);
Console.WriteLine();
}
}
//把委托作为一个参数传递到ProcessDelagate()第一个参数中
void ProcessDelagate(delegateTest Action, double d)
{
double Result = Action(d);
Console.WriteLine("提供的值是{0},结果是{1}", d, Result);
}
}
}

using System;
using System.Collections.Generic;
using System.Text;
namespace ConsoleApplication1
{
//如果要多次调用这个方法，就要多次调用这个委托,委托包含多个方法，就是多播委托！
class 多播委托
{
//用的是void没有返回值
public delegate void DelageteTest(double val);
static void Main()
{
//多播委托中添加2个方法
DelageteTest MyTest = new DelageteTest(Test.Area);
MyTest += new DelageteTest(Test.Scare);
//下面的代码跟上面的3行代码是等价的
//DelageteTest MyTest;
//DelageteTest Test1 = new DelageteTest(Test.Area);
//DelageteTest Test2 = new DelageteTest(Test.Scare);
//MyTest = Test1 + Test2;
多播委托 多 = new 多播委托();
多.OPreation(MyTest, 2.0);
多.OPreation(MyTest, 12.0);
}
void OPreation(DelageteTest Action, double d)
{
Action(d);
}
}
class Test
{
public static void Area(double Val)
{
Console.WriteLine(Val * 2);
}
public static void Scare(double Val)
{
Console.WriteLine(Val * Val);
}
}
}