1、接口：接口與抽象類一樣，也是表示某種規(guī)則，一旦使用了該規(guī)則，就必須實現(xiàn)相關(guān)的方法。對于C#語言而言，由于只能繼承自一個父類，因此若有多個規(guī)則需要實現(xiàn)，則使用接口是個比較好的做法。2、接口的定義interface 接口名{方法聲明;}3、不同接口中若有多個相同名稱的方法，則需要顯式指定接口名，例如：4、接口的使用使用接口也可以實現(xiàn)多態(tài)。代碼如下：class Program{static void Main(string[] args){//提供三個類，完成工資的計算 List<ICalu> list = new List<ICalu>();list.Add(new Boss());list.Add(new Clert());list.Add(new Clert());list.Add(new Customer());foreach (ICalu emp in list){emp.Calu(); //多態(tài) }}}class Boss : ICalu{public void Calu(){Console.WriteLine("計算老板工資");}}class Customer : ICalu{public void Calu(){Console.WriteLine("計算客戶工資");}}class Clert : ICalu{public void Calu(){Console.WriteLine("計算職員工資");}}interface ICalu{void Calu();}5、接口應(yīng)用場合舉例6、接口demousing System;using System.Collections.Generic;using System.Linq; using System.Text;namespace ConsoleApplication1 {class Program { static void Main(string[] args) { List<IShow> list = new List<IShow>(); list.Add(new Map()); list.Add(new Voice()); list.Add(new Video()); list.Add(new ThreeD());foreach(IShow ishow in list) { ishow.Show(); } } } interface IShow { void Show(); } public class Map:IShow { public void Show() { Console.WriteLine("顯示圖片"); } } public class Voice : IShow { public void Show() { Console.WriteLine("播放聲音"); }} public class Video : IShow { public void Show() { Console.WriteLine("顯示視頻"); } } public class ThreeD : IShow { public void Show() { Console.WriteLine("3D交互"); } }}

?

using System;

using System.Collections.Generic;

using System.Linq; using System.Text;

namespace ConsoleApplication2 {

??? public delegate void Mydel();?

?? class Program???? {??????

? static void Main(string[] args)???????? {???

???????? Hospital h = new Hospital();??????

????? People LaoWang = new People();?

?????????? LaoWang.OnEatTooMuch += new Mydel(h.Check);???

???????? LaoWang.Eat(10);???????? }??

????????????? }

?

??? class People???? {???

???? public event Mydel OnEatTooMuch;???

???? public void Eat(int i)???????? {??????

????? if(i<3)???????????? {?

?????????????? Console.WriteLine("吃的太少");???????????? }?

?????????? else if(i==3)???????????? {???????????????? Console.WriteLine("吃的正好");???????????? }??

????????? else if (i <=5)???????????? {???????????????? Console.WriteLine("吃的多了點");???????????? }???

???????? else???????????? {???????????????? if(OnEatTooMuch!=null)???????

???????? {???

???????????????? OnEatTooMuch();???????????????? }??

????????? }????

??? }???

}

?

??? class Hospital???? {??

????? public void Check()???????? {???????????? Console.WriteLine("治療");???????? }?

?

?? }

?

}

轉(zhuǎn)載于:https://www.cnblogs.com/webzhoulin/p/3558160.html

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