代码无实际意义, 贴上代码备忘:
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using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Collections;
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namespace ImpEnumeratable
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{
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class Collec : IEnumerable
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{
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public List<Itor> Items = new List<Itor>();
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IEnumerable 成员
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public void Add(Itor it)
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{
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Items.Add(it);
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}
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}
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class Itor : IEnumerator
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{
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public string N;
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int posotion = -1;
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Collec c;
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public Itor(Collec cc)
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{
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c = cc;
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posotion = -1;
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}
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public Itor(string s)
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{
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N = s;
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}
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IEnumerator 成员
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}
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class Program
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{
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static void Main(string[] args)
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{
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Collec cols = new Collec();
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Itor it01 = new Itor("Hello ");
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Itor it02 = new Itor("World");
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cols.Add(it01);
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cols.Add(it02);
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foreach (Itor i in cols)
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{
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Console.WriteLine(i.N);
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}
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}
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}
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}
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一般将Itor类放入Collec 内部声明, 集合和集合中的元素紧耦合。 还可保证类型安全。
可以实现范型接口 public interface IEnumerator<T> : IDisposable, IEnumerator
public interface IEnumerable<T> : IEnumerable
来实现范型版本。