Ever wanted to create an enumerable class? Implementing
IEnumerator and IEnumerable can do the trick.
using
System;
using
System.Collections;
public class
Person {
public Person(string
name, int
age) {
Name = name;
Age = age;
}
public
string Name;
public
int Age;
}
public
class People : IEnumerable {
private
Person[] _people;
public
People() {
_people = new
Person[3]
{
new Person("Bob", 30),
new Person("Jim", 31),
new Person("Sue", 29),
};
}
private class
PeopleEnum : IEnumerator {
public Person[] _people;
int position = -1;
public PeopleEnum(Person[]
list) {
_people = list;
}
public bool MoveNext() {
position++;
return
(position < _people.Length);
}
public void Reset() {position =
-1;}
public object
Current {
get
{
try
{
return
_people[position];
}
catch
(IndexOutOfRangeException) {
throw new
InvalidOperationException();
}
}
}
}
public
IEnumerator GetEnumerator() {
return new
PeopleEnum(_people);
}
}
class
App {
[STAThread]
static void Main(string[]
args) {
People people =
new
People();
foreach(Person p
in
people)
Console.WriteLine(p.Name +
"\t\t" + p.Age);
}
}
