IEnumerable 和 IEnumerator 接口的作用
实现IEnumerable接口的类,可以支持foreach循环遍历对象的集合元素
IEnumerable:
IEnumerator:
sample:
using System;
using System.Collections;
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namespace ConsoleApplication1
{
/// <summary>
/// Summary description for Class1.
/// </summary>
class Class1
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main(string[] args)
{
CStringEnum se = new CStringEnum();
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foreach (string s in se)
{
Console.WriteLine(s);
}
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Console.Read() ;
}
}
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class CStringEnum : IEnumerable, IEnumerator
{
string[] items = new string[16];
int index = -1;
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public CStringEnum()
{
for(int i=0; i<items.Length; ++i)
items[i] = "s" + i.ToString();
}
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#region IEnumerable Members
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public IEnumerator GetEnumerator()
{
// TODO: Add StringCollection.GetEnumerator implementation
return (IEnumerator)this;
}
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#endregion
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#region IEnumerator Members
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public void Reset()
{
// TODO: Add CStringEnum.Reset implementation
index = -1;
}
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public object Current
{
get
{
// TODO: Add CStringEnum.Current getter implementation
return items[index];
}
}
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public bool MoveNext()
{
// TODO: Add CStringEnum.MoveNext implementation
index++;
return index >= items.Length ? false : true;
}
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#endregion
}
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}
IEnumerable:
IEnumerator GetEnumerator() | 返回可循环访问集合的枚举数。 |
IEnumerator:
object Current | 获取集合中的当前元素。 |
bool MoveNext() | 将枚举数推进到集合的下一个元素。 如果枚举数成功地推进到下一个元素,则为 true;如果枚举数越过集合的结尾,则为 false。 |
void Reset() | 将枚举数设置为其初始位置,该位置位于集合中第一个元素之前。 |
sample:
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转自:http://www.cnblogs.com/netflu/archive/2006/07/31/463974.html
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