Generic IEnumerator/IEnumerable : Generic IEnumerator « Generic « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. Generic
3. Generic IEnumerator

using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;

class StringEnumerator : IEnumerator<string>
{
   string[] Strings; int Position = -1;

   public string Current                         
   {
      get { 
         return Strings[Position]; 
      }
   }

   object IEnumerator.Current                    
   {
      get { 
        return Strings[Position]; 
      }
   }

   public bool MoveNext()                        
   {
      if (Position < Strings.Length - 1)
      { 
        Position++; 
        return true; 
      }
      else
         return false;
   }

   public void Reset()                           
   {
      Position = -1;
   }

   public void Dispose() { }

   public StringEnumerator(string[] strings)      
   {
      Strings = new string[strings.Length];
      for (int i = 0; i < strings.Length; i++)
         Strings[i] = strings[i];
   }
}

class MyStrings : IEnumerable<string>
{
   string[] Strings = { "AAA", "BBB", "CCC" };

   public IEnumerator<string> GetEnumerator()    
   {
      return new StringEnumerator(Strings);
   }

   IEnumerator IEnumerable.GetEnumerator()       
   {
      return new StringEnumerator(Strings);
   }
}

class Program
{
   static void Main()
   {
      MyStrings mc = new MyStrings();
      foreach (string st in mc)
         Console.Write("{0}  ", st);
      Console.WriteLine("");
   }
}

AAA  BBB  CCC