从枚举获取XmlEnumAttribute [英] Get XmlEnumAttribute from enum

问题描述

我有枚举：

public enum Operation {
    /// <remarks/>
    [System.Xml.Serialization.XmlEnumAttribute("01")]
    Item01,

    /// <remarks/>
    [System.Xml.Serialization.XmlEnumAttribute("02")]
    Item02,

    /// <remarks/>
    [System.Xml.Serialization.XmlEnumAttribute("03")]
    Item03,

    /// <remarks/>
    [System.Xml.Serialization.XmlEnumAttribute("04")]
    Item04,
}

我怎样才能得到XmlEnumAttribute值

How I can get XmlEnumAttribute value?

我想在那？

var res = Operation.Item1;
var result = (res.GetType().GetField("Item01").GetCustomAttributes(typeof(XmlEnumAttribute), true)[0] as XmlEnumAttribute).Name;

可能存在更好的方法？

May be exists better method?

推荐答案

您可以创建一个帮手（静态）类，这种扩展方法

You could create an helper (static) class, with this extension method

public static string GetXmlEnumAttributeValueFromEnum<TEnum>(this TEnum value) where TEnum : struct, IConvertible
        {
            var enumType = typeof(TEnum);
            if (!enumType.IsEnum) return null;//or string.Empty, or throw exception

            var member = enumType.GetMember(value.ToString()).FirstOrDefault();
            if (member == null) return null;//or string.Empty, or throw exception

            var attribute = member.GetCustomAttributes(false).OfType<XmlEnumAttribute>().FirstOrDefault();
            if (attribute == null) return null;//or string.Empty, or throw exception
            return attribute.Name;
        }

使用

usage

var res = Operation.Item1;
var result = res.GetXmlAttributeValueFromEnum();

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