c# 索引器
public class Person { private string[] names; public Person(int length) { names = new string[length]; } public string this[int index] { get { if (index < 0 || index > names.Length) { throw new IndexOutOfRangeException("索引超出范围"); } return names[index]; } set { if (index < 0 || index > names.Length) { throw new IndexOutOfRangeException("索引超出范围"); } names[index] = value; } } }
static void Main(string[] args) { Person p = new Person(4); p[0] = "wjire0"; p[1] = "wjire1"; p[2] = "wjire2"; p[3] = "wjire3"; Console.WriteLine(p[1]); Console.WriteLine(p[5]); Console.ReadLine(); }
索引器可以看成是C#开发人员对[]操作符的重载!