C#-接口

1 接口的定义

public   interface  IAttribute
{
     string  Name {  get ; set ;}
}

public   class  Component : IAttribute
{
     public   string  Name
    {
         get
        {
             return   " 张三 " ;
        }
         set
        {
             this .Name  =  value;
        }
    }
}

2 接口的实现

public   interface  IPlayer
{
     string  GetName();
     string  Show();
}

public   class  Options
{
     public   static   readonly   string  JIANDAO  =   " 剪刀 " ;
     public   static   readonly   string  SHITOU  =   " 石头 " ;
     public   static   readonly   string  BU  =   " 布 " ;
}

public   class  Grandpa:IPlayer
{
     public   string  GetName()
    {
         return   " 爷爷 " ;
    }

     public   string  Show()
    {
        Random random  =   new  Random();
         int  i  =  ( int )(random.Next()  *   1000 )  %   3 ;
         switch  (i)
        {
             case   0 :  return  Options.JIANDAO;
             case   1 :  return  Options.SHITOU;
             default :  return  Options.BU;
        }
     }
}

public   class  Grandson:IPlayer
{
     public   string  GetName()
    {
         return   " 孙子 " ;
    }

     public   string  Show()
    {
         return  Options.JIANDAO;
    }
}

3. 接口的继承
一个接口可从一个或多个基接口继承
interface IA { }
interface IB:IA { }
interface IC : IA, IB { }
interface ID : IA, IB, IC { }

4.接口与回调

 

        static   void  Main( string [] args)
        {
             // 创建一个控制器对象，将提供给它的回调对象传入
           Resolve resolve  =   new  Resolve( new  PlayBasketball());
            resolve.Play();

            resolve  =   new  Resolve( new  PlayFootball());
            resolve.Play();
        }

     public   interface  IPlayer
    {
         void  Play();
    }
    
      public   class  PlayBasketball:IPlayer
    {
         public   void  Play()
        {
            Console.WriteLine( " 玩篮球 " );
        }
    }
    
     public   class  PlayFootball : IPlayer
    {
         public   void  Play()
        {
            Console.WriteLine( " 玩足球 " );
        }
    }

     ///  控制角色--控制器对象
     ///   </summary>
     public   class  Resolve
    {
         // 持有一个接口的引用,通过构造方法初始化
         private  IPlayer player;
        public  Resolve(IPlayer player)
        {
             this .player  =  player;
        }

         public   void  Play()
        {
            player.Play();
        }
    }

    
    
来自：http://www.cnblogs.com/beniao/archive/2008/07/28/1249031.html