将枚举数推进到集合的下一个元素。
命名空间: System.Collections
程序集: mscorlib(mscorlib.dll 中)
语法:
bool MoveNext()
返回值
Type: System.Boolean
如果枚举数已成功地推进到下一个元素,则为 true;如果枚举数传递到集合的末尾,则为 false。
// When you implement IEnumerable, you must also implement IEnumerator. 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; } object IEnumerator.Current { get { return Current; } } public Person Current { get { try { return _people[position]; } catch (IndexOutOfRangeException) { throw new InvalidOperationException(); } } } }