免费观看行情软件网站进入,大德通众包做网站怎么样,免费搭建网页游戏平台,苗木网站模版昨天终于对new关键字对类成员的阻断作用有了比较清晰的认识#xff0c;“对类成员的阻断”是王涛大哥在其作品《你必须知道的.NET》的说法#xff0c;昨天在园里看到一位前辈戏称之为“封印咒术”#xff0c;我感觉这个说法很贴切。比如Sons类继承自Fathers类#xff0c;在… 昨天终于对new关键字对类成员的阻断作用有了比较清晰的认识“对类成员的阻断”是王涛大哥在其作品《你必须知道的.NET》的说法昨天在园里看到一位前辈戏称之为“封印咒术”我感觉这个说法很贴切。比如Sons类继承自Fathers类在Sons中对Fathers的虚方法DoVirtualWork()实现了封印则以后继承自Sons的类就无法继承Fathers的DoVirtualWork()方法。代码如下 Code public class Fathers { public void DoWork() { Console.WriteLine(Father.DoWork()); } public virtual void DoVirtualWork() { Console.WriteLine(Father.DoVirtualWork()); } } public class Sons : Fathers { public new void DoVirtualWork() { //base.DoVirtualWork(); Console.WriteLine(Son.DoVirtualWork()); } } public class Grandsons : Sons { } public class Sonson : Sons { } class Program { static void Main(string[] args) { //调用Sons.DoVirtualWork() Sons person1 new Grandsons(); person1.DoVirtualWork(); //调用Sons.DoVirtualWork() Sons person2 new Sons(); person2.DoVirtualWork(); //调用Fathers.DoVirtualWork() Fathers person new Grandsons(); person.DoVirtualWork(); //调用Fathers.DoVirtualWork() Fathers person3 new Sonson(); person3.DoVirtualWork(); //调用Sons.DoVirtualWork() Sonson person4 new Sonson(); person4.DoVirtualWork(); Console.Read(); } } 运行结果 Son.DoVirtualWork()Son.DoVirtualWork()Father.DoVirtualWork()Father.DoVirtualWork()Son.DoVirtualWork() 所以在类的设计中尽可能不用new阻断类成员。 转载于:https://www.cnblogs.com/happyjinyalei/archive/2009/02/26/1398080.html
