从C＃中的枚举中获取int值

问题描述：

我有一个名为的课程（复数）。在这个类中有一个名为 Question （单数）的枚举，看起来像这样。

I have a class called Questions (plural). In this class there is an enum called Question (singular) which looks like this.

public enum Question
{
    Role = 2,
    ProjectFunding = 3,
    TotalEmployee = 4,
    NumberOfServers = 5,
    TopBusinessConcern = 6
}

在问题 class，我有一个 get（int foo）函数，它为 Questions 对象> FOO 。有没有一种简单的方法可以从枚举中获取整数值，所以我可以做一些像 Questions.Get（Question.Role）？

In the Questions class, I have a get(int foo) function that returns a Questions object for that foo. Is there an easy way to get the integer value from the enum so I can do something like Questions.Get(Question.Role)?

答

只需转换枚举，例如

int something = (int) Question.Role;

以上内容适用于您在野外看到的绝大多数枚举，作为默认的基础类型对于枚举是 int 。

The above will work for the vast majority of enums you see in the wild, as the default underlying type for an enum is int.

但是，如 cecilphillip 指出，枚举可以有不同的底层类型。
如果枚举声明为 uint ， long 或 ulong ，它应该转换为枚举的类型;例如for

However, as cecilphillip points out, enums can have different underlying types. If an enum is declared as a uint, long, or ulong, it should be cast to the type of the enum; e.g. for

enum StarsInMilkyWay:long {Sun = 1, V645Centauri = 2 .. Wolf424B = 2147483649};

你应该使用

long something = (long)StarsInMilkyWay.Wolf424B;

从C＃中的枚举中获取int值

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