我在一个枚举变量中设置了三个枚举常量,有没有办法从枚举变量中检索枚举常量作为数组？

Question

下面我在一个枚举变量中设置三个枚举常量,有没有办法从枚举变量中检索枚举常量作为数组？

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();

        Fruits fruit1 = Fruits.Apple;
        Fruits fruit2 = Fruits.Mango;

        Fruits mixedFruits = Fruits.Apple | Fruits.Orange | Fruits.Banana;

        string allFruits = mixedFruits.ToString();
        // I want the output to be "Apple, Orange, Banana"
        //Is this possible??
    }
}

public enum Fruits
{
    Apple,
    Mango,
    Orange,
    Grapes,
    Banana,
}

Answer 1

您必须使用[Flags]属性并将枚举值设置为2的幂:

[Flags]
public enum Fruits
{
    Apple = 1,
    Mango = 2,
    Orange = 4,
    Grapes = 8,
    Banana = 16
}

现在,allFruits.ToString()将打印"Apple, Orange, Banana".