覆蓋類成員：通過new關(guān)鍵字修飾虛函數(shù)表示覆蓋該虛函數(shù)。
一個(gè)虛函數(shù)被覆蓋后，任何父類變量都不能訪問該虛函數(shù)的具體實(shí)現(xiàn)。
public virtual void IntroduceMyself(){...}//父類虛函數(shù)
public new void IntroduceMyself(){...}//子類覆蓋父類虛函數(shù)
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace MethodOverrideByNew
{
public enum Genders {
Female=0,
Male=1
}
public class Person {
protected string _name;
protected int _age;
protected Genders _gender;
/// <summary>
/// 父類構(gòu)造函數(shù)
/// </summary>
public Person() {
this._name = "DefaultName";
this._age = 23;
this._gender = Genders.Male;
}
/// <summary>
/// 定義虛函數(shù)IntroduceMyself()
/// </summary>
public virtual void IntroduceMyself() {
System.Console.WriteLine("Person.IntroduceMyself()");
}
/// <summary>
/// 定義虛函數(shù)PrintName()
/// </summary>
public virtual void PrintName() {
System.Console.WriteLine("Person.PrintName()");
}
}
public class ChinesePerson :Person{
/// <summary>
/// 子類構(gòu)造函數(shù)，指明從父類無參構(gòu)造函數(shù)調(diào)用起
/// </summary>
public ChinesePerson() :base(){
this._name = "DefaultChineseName";
}
/// <summary>
/// 覆蓋父類方法IntroduceMyself，使用new關(guān)鍵字修飾虛函數(shù)
/// </summary>
public new void IntroduceMyself() {
System.Console.WriteLine("ChinesePerson.IntroduceMyself()");
}
/// <summary>
/// 重載父類方法PrintName，使用override關(guān)鍵字修飾虛函數(shù)
/// </summary>
public override void PrintName(){
System.Console.WriteLine("ChinesePerson.PrintName()");
}
}
class Program
{
static void Main(string[] args)
{
//定義兩個(gè)對(duì)象，一個(gè)父類對(duì)象，一個(gè)子類對(duì)象
Person aPerson = new ChinesePerson();
ChinesePerson cnPerson = new ChinesePerson();
//調(diào)用覆蓋的方法，父類對(duì)象不能調(diào)用子類覆蓋過的方法，只能調(diào)用自身的虛函數(shù)方法
aPerson.IntroduceMyself();
cnPerson.IntroduceMyself();
//調(diào)用重載方法，父類對(duì)象和子類對(duì)象都可以調(diào)用子類重載過后的方法
aPerson.PrintName();
cnPerson.PrintName();
System.Console.ReadLine();
}
}
}
結(jié)果：
Person.IntroduceMyself()
ChinesePerson.IntroduceMyself()
ChinesePerson.PrintName()
ChinesePerson.PrintName()
posted on 2009-10-26 15:57
期待明天 閱讀(751)
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