C#-介面

1 介面的定義public interface IAttribute
{
    string Name { get;set;}
}

public class Component : IAttribute
{
    public string Name
    {
        get
        {
            return "張三";
        }
        set
        {
            this.Name = value;
        }
    }
}

2 介面的實現public interface IPlayer
{
    string GetName();
    string Show();
}

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

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

    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 "孫子";
    }

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

3. 介面的繼承
一個介面可從一個或多個基底介面繼承
interface IA { }
interface IB:IA { }
interface IC : IA, IB { }
interface ID : IA, IB, IC { }

4.介面與回調

        static void Main(string[] args)
        {
            //建立一個控制器對象，將提供給它的回調對象傳入
           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("玩籃球");
        }
    }
    
    public class PlayFootball : IPlayer
    {
        public void Play()
        {
            Console.WriteLine("玩足球");
        }
    }

    /// 控制角色--控制器對象
    /// </summary>
    public class Resolve
    {
        //持有一個介面的引用,通過構造方法初始化
        private IPlayer player;
       public Resolve(IPlayer player)
        {
            this.player = player;
        }

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

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