迭代器模式(Iterator Pattern)，提供一种方法顺序访问一个聚合对象中元素，而不暴露该集合对象的内部表示。
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using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Text;
namespace
PatternProject
{
public
class
People
{
public
string
name
{
get
;
set
; }
public
string
sex
{
get
;
set
; }
public
int
age
{
get
;
set
; }
public
DateTime JoinDateTime
{
get
;
set
; }
public
People(
string
name,
string
sex,
int
age)
{
this
.name = name;
this
.sex = sex;
this
.age = age;
this
.JoinDateTime = DateTime.Now;
}
}
public
interface
ISearcher
{
bool
Next();
//在迭代时，判断是否能获取下一个，外部遍历必需实现该方法
}
public
interface
IProvince
{
ISearcher GetSearcher();
//获取迭代器对象
}
public
class
Province : IProvince
{
List<People> peopleList =
new
List<People>();
public
string
name
{
get
;
set
; }
public
Province(
string
name)
{
this
.name = name;
}
public
ISearcher GetSearcher()
{
return
new
Searcher(
this
,
"黄某"
,
"男"
, 45);
}
public
People
this
[
int
index]
{
get
{
return
peopleList[index]; }
//set { peopleList.Add(value); }
}
public
void
Join(People people)
{
peopleList.Add(people);
}
public
int
GetPeopleCount()
{
return
peopleList.Count;
}
}
public
class
Searcher : People, ISearcher
{
Province _province;
int
_currentIndex;
public
Searcher(Province province,
string
name,
string
sex,
int
age)
:
base
(name, sex, age)
{
_province = province;
_currentIndex = -1;
}
public
People Current
{
get
{
return
_province[_currentIndex]; }
}
public
bool
Next()
{
_currentIndex++;
return
_province.GetPeopleCount() > _currentIndex;
}
}
}
using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Text;
namespace
PatternProject
{
class
Program
{
static
void
Main(
string
[] args)
{
Province SZProvince =
new
Province(
"深圳市"
);
SZProvince.Join(
new
People(
"张三"
,
"男"
, 25));
SZProvince.Join(
new
People(
"李四"
,
"男"
, 35));
SZProvince.Join(
new
People(
"王五"
,
"男"
, 30));
SZProvince.Join(
new
People(
"赵六"
,
"男"
, 28));
SZProvince.Join(
new
People(
"谢七"
,
"女"
, 20));
Console.WriteLine(
"{0}共计人口：{1}人"
, SZProvince.name, SZProvince.GetPeopleCount());
Searcher srh= (Searcher)SZProvince.GetSearcher();
Console.WriteLine(
"人口检查官:{0}人口普查结果如下："
, srh.name);
while
(srh.Next())
{
People p=srh.Current;
Console.WriteLine(
"{0},{1},{2}岁于{3}入住;"
, p.name, p.sex, p.age, p.JoinDateTime);
}
Console.ReadKey();
}
}
}
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本文转自 梦在旅途 博客园博客，原文链接：http://www.cnblogs.com/zuowj/p/3504610.html ，如需转载请自行联系原作者
