如何创建两级枚举

Question

对不起,如果问题的标题令人困惑,但我不知道该怎么问.真正想要的是拥有永不改变的只读数据.

目前我有两个枚举MeterType和SubMeterType

public enum MeterType
{
  Water = 1001,
  Electricity = 1004,
  Gas = 1007
}

和

public enum SubMeterType
{
  DrinkingWater = 1002,
  UsageWater = 1003,
  SubsidiseGas = 1008,
  NonSusbsidisedGas = 1009
} 

现在我想用这些如下

获取MeterType

string meterType = MeterType.Water.ToString("d");

并获得SubMeterType,是否可能有类似的东西

string subMeterType = MeterType.Water.DrinkingWater("d");

应该使用具有readonly属性的类的另一种方法吗？或修改这些枚举以满足我的要求.

Answer 1

您可以在嵌套类中使用常量整数,而不是使用枚举:

public static class MeterType
{
    public const int Water = 1001;
    public const int Electricity = 1004;
    public const int Gas = 1007;

    public static class Waters
    {
        public const int DrinkingWater = 1002;
        public const int UsageWater = 1003;
    }

    public static class Gases
    {
        public const int SubsidiseGas = 1008;
        public const int NonSusbsidisedGas = 1009;
    }
}