C#委托_001

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace CSharp_Learn_001
{
         //1 定义委托
         public delegate void GreetingDelegate( string name);

         class Program
        {
                 //1.1 Func
                 private static void EnglishGreeting( string name)
                {
                        Console.WriteLine( "Moniring, " + name);
                }
                 //1.2 Func
                 private static void ChineseGreeting( string name)
                {
                        Console.WriteLine( "早上好, " + name);
                }
                 //2.1 DelegateFunc
                 private static void GreetPeople( string name, GreetingDelegate MakeGreeting)
                {
                        MakeGreeting(name);
                }

                 //3. main
                 static void Main( string[] args)
                {
                        GreetPeople( "Jimmy Yang", EnglishGreeting);
                        GreetPeople( "杨麒", ChineseGreeting);
                        Console.ReadKey();
                }

        }
}

委托是一个类，它定义了方法的类型，使得可以将方法当作另一个方法的参数来进行传递，这种将方法动态地赋给参数的做法，可以避免在程序中大量使用If-Else(Switch)语句，同时使得程序具有更好的可扩展性。