c# - 如何枚举枚举？(How to enumerate an enum?)

Question

How can you enumerate an enum in C#?

(您如何enum C＃中的enum ？)

Eg the following code does not compile:

(例如，以下代码无法编译：)

public enum Suit 
{
    Spades,
    Hearts,
    Clubs,
    Diamonds
}

public void EnumerateAllSuitsDemoMethod() 
{
    foreach (Suit suit in Suit) 
    {
        DoSomething(suit);
    }
}

And gives the following compile-time error:

(并给出以下编译时错误：)

'Suit' is a 'type' but is used like a 'variable'

(“西装”是“类型”，但像“变量”一样使用)

It fails on the Suit keyword, the second one.

(它在Suit关键字（第二个）上失败。)

  ask by Ian Boyd translate from so

Answer 1

foreach (Suit suit in (Suit[]) Enum.GetValues(typeof(Suit)))
{
}

Note : The cast to (Suit[]) is not strictly necessary, but does make the code 0.5 ns faster.

(注意 ：强制转换为(Suit[])并不是绝对必要的， 但是可以使代码快0.5 ns。)