索引器
1 namespace ConsoleApplication3 2 { 3 class Program 4 { 5 static void Main(string[] args) 6 { 7 //通过索引取值 8 Person p = new Person(); 9 p[1] = "tom"; 10 Console.WriteLine(p[1] + p[2]); 11 //p["sum", 9, 8] = "bbb";//错误,不能设置值 12 Console.WriteLine(p["jim", 9, 8]);//只读 13 Console.ReadKey(); 14 } 15 class Person 16 { 17 private string FirstName = "张三"; 18 private string SecondName = "李四"; 19 public string this[int index] 20 { 21 get { 22 if(index==1) 23 { 24 return FirstName; 25 } 26 else if (index == 2) 27 { 28 return SecondName; 29 } 30 else 31 { 32 throw new Exception("数据异常"); 33 } 34 } 35 set { 36 if(index==1) 37 { 38 FirstName = value; 39 } 40 else if (index == 2) 41 { 42 SecondName = value; 43 } 44 else 45 { 46 throw new Exception("数据异常"); 47 } 48 } 49 } 50 private string Name = "aaa"; 51 private int x = 1; 52 private int y = 2; 53 public string this[string name, int x, int y]//可以重载 54 { 55 get { 56 return Name + x + y; 57 } 58 } 59 } 60 } 61 }