一.非含参委托

using System;
namespace 委托
{
    //2 定义委托类型  委托和目标方法基本一致
    public delegate void DelegateEat();
     class Program
    {//1 应该有目标方法
        public static void ZSEat()
        {
            Console.WriteLine("张三吃饭饭--->");
        }
        public static void LSEat( )
        {
            Console.WriteLine("李四吃饭饭--->");
        }       
        public static void Main(string[] args)
        {  //3 申明委托变量
            DelegateEat delegateEat;
            //4 赋值
            delegateEat = ZSEat;
            delegateEat += LSEat;         
            delegateEat += delegateEat;
            delegateEat -= LSEat; 
            //5 执行委托
            delegateEat();
        }
    }   
}

结果:张三吃饭饭--->

         李四吃饭饭--->

         张三吃饭饭--->

二.含参数委托类

例一:目标函数中放一个参数

using System;
namespace ConsoleApplication1
{    
        public delegate void DelegateEat();//2
        class Program
        {
            /// 第一个参数放置符合类型的方法!!!
            public static void ExcDelegateEat(DelegateEat de)//1
            {              
                Console.WriteLine("先执行");
                de();
            }
            public static void LSEat()
            {                
                Console.WriteLine("赵六吃呵呵哒");              
            }
            public static void Main(string[] args)
            {
                ExcDelegateEat(LSEat);
            }        
    }
}

结果:先执行

赵六吃呵呵哒

例二:目标函数中放两个参数

using System;namespace ConsoleApplication1
{    
        public delegate void DelegateEat();//2
        class Program
        {
            /// 第一个参数放置符合类型的方法!!!
            public static void ExcDelegateEat(DelegateEat de, string userName)//1
            {              
                Console.WriteLine("{0}在使用吃的功能", userName);
                de();
            }
            public static void LSEat()
            {                
                Console.WriteLine("赵六吃呵呵哒");              
            }
            public static void Main(string[] args)
            {
                ExcDelegateEat(LSEat, "李四");
            }        
    }
}

结果:李四在使用吃的功能

赵六吃呵呵哒

例三:目标函数和委托类型均有两个参数

 1 using System;
 2 namespace ConsoleApplication1
 3 {    
 4         public delegate void DelegateEat(string x,string y);//2
 5         class Program
 6         {
 7             public static void ExcDelegateEat(DelegateEat de, string userName)//1
 8             {
 9                 string tr = "王五";
10                 string er = "洪七";
11                 Console.WriteLine("{0}在使用吃的功能", userName);
12                 de(tr,er);
13             }
14             public static void LSEat(string m,string n)
15             {
16                 Console.WriteLine("{0}吃呵呵哒",m);
17                 Console.WriteLine("赵六吃呵呵哒");
18                 Console.WriteLine("{0}吃呵呵哒",n);
19             }
20             public static void Main(string[] args)
21             {
22                 ExcDelegateEat(LSEat, "李四");
23                 Console.ReadKey();
24             }        
25     }
26 }