如何枚举一个枚举 [英] How to enumerate an enum

问题描述

如何在 C# 中枚举 enum?

How can you enumerate an enum in C#?

例如以下代码无法编译:

E.g. the following code does not compile:

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

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

它给出了以下编译时错误:

And it gives the following compile-time error:

'Suit' 是一种'类型'，但用作'变量'

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

它在 Suit 关键字上失败，第二个.

It fails on the Suit keyword, the second one.

推荐答案

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

注意:转换到 (Suit[]) 并不是绝对必要的，但它确实使代码快了 0.5 ns.

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

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