C#中enum类型

最近碰到了枚举类型，就顺便整理下。

枚举的基类Enum，可以是除 Char 外的任何整型。不做显示声明的话，默认是整形（Int32）。

声明一个Enum类型：

        /// <summary>

        /// 颜色

        /// </summary>

        public enum People

        {

            [Description("婴儿")]

            Baby = 0,

            [Description("儿童")]

            Children = 5,

            [Description("青年")]

            Youth = 20,

            [Description("老人")]

            Old = 60

        }

Enum转化为String类型：

(1)利用Object.ToString()方法：

People.Baby.ToString();

(2)利用Enum的静态方法GetName：

Enum.GetName(typeof(People), 0)

Enum.GetName(typeof(People), People.Baby)

String类型转化为Enum：

(1)利用Enum的静态方法Parse：

(People)Enum.Parse(typeof(People), "Children")

Enum转化为整数：

(1)强制转化化

(int)People.Youth;

(byte)People.Youth;//byte的数值范围，0-255，小心有些会溢出

int转化为Enum：

(People)(60)
(People)Enum.ToObject(typeof(People), 60)

获取Enum字符串数组：

foreach (var item in Enum.GetNames(typeof(People)))

{

    Console.WriteLine(item);

}

判断某个整形是否定义在Enum中：

Enum.IsDefined(typeof(People), 60);//返回true或false

结果为：

获取枚举类型头上的Description值：

class Program

    {

        static void Main(string[] args)

        {

            Console.WriteLine(GetDes(People.Youth));

            Console.ReadKey();

        }

        public static string GetDes(Enum value)

        {

            return ((DescriptionAttribute)Attribute.GetCustomAttribute(value.GetType().GetField(value.ToString()), typeof(DescriptionAttribute))).Description;

        }

        public enum People

        {

            [Description("婴儿")]

            Baby = ,

            [Description("儿童")]

            Children = ,

            [Description("青年")]

            Youth = ,

            [Description("老人")]

            Old = 

        }

    }

结果：

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巴特西

C#中enum类型

枚举的基类Enum，可以是除 Char 外的任何整型。不做显示声明的话，默认是整形（Int32）。

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