IEnumerator.MoveNext Method

Return Value

Type: System.Boolean
true if the enumerator was successfully advanced to the next element; false if the enumerator has passed the end of the collection.

Public Class PeopleEnum
   Implements IEnumerator

   Public _people() As Person

   ' Enumerators are positioned before the first element
   ' until the first MoveNext() call.
   Dim position As Integer = -1

   Public Sub New(ByVal list() As Person)
      _people = list
   End Sub

   Public Function MoveNext() As Boolean Implements IEnumerator.MoveNext
      position = position + 1
      Return (position < _people.Length)
   End Function

   Public Sub Reset() Implements IEnumerator.Reset
      position = -1
   End Sub

   Public ReadOnly Property Current() As Object Implements IEnumerator.Current
      Get
         Try
            Return _people(position)
         Catch ex As IndexOutOfRangeException
            Throw New InvalidOperationException()
         End Try
      End Get
   End Property
End Class

public class PeopleEnum : IEnumerator
{
   public Person[] _people;

   // Enumerators are positioned before the first element
   // until the first MoveNext() call.
   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();
         }
      }
   }
}