强制枚举在C#中将数字识别为字符串

Question

我需要将以下代码放入枚举中:

 10, 11, 13, AA, BB, EE

我正在努力让他们进入C#中的枚举.我目前有这个:

 public enum REASON_CODES { _10, _11, _13, AA, BB, CC }

但想拥有这个,数字被识别为字符串,而不是整数:

 public enum REASON_CODES { 10, 11, 13, AA, BB, CC }

这可能还是我在做梦？

Answer 1

尝试使用枚举和DescriptionAttribute:

public enum REASON_CODES
{
    [Description("10")]
    HumanReadableReason1,
    [Description("11")]
    SomethingThatWouldMakeSense,
    /* etc. */
}

然后你可以使用一个帮助器(比如Enumerations.GetDescription)获得"真实"值(同时保持在C#命名约束内).

为了使它成为一个完整的答案:

• @BryanRowe编写了一个Enum-to-Description方法
  /sf/answers/125958101/
• @max写了一个描述到枚举方法
  /sf/answers/305750791/

万一有人想要一个与这两张海报结婚的扩展课:

public static class EnumExtensions
{
    public static String ToDescription<TEnum>(this TEnum e) where TEnum : struct
    {
        var type = typeof(TEnum);
        if (!type.IsEnum) throw new InvalidOperationException("type must be an enum");

        var memInfo = type.GetMember(e.ToString());
        if (memInfo != null & memInfo.Length > 0)
        {
            var descAttr = memInfo[0].GetCustomAttributes(typeof(DescriptionAttribute), false);
            if (descAttr != null && descAttr.Length > 0)
            {
                return ((DescriptionAttribute)descAttr[0]).Description;
            }
        }
        return e.ToString();
    }

    public static TEnum ToEnum<TEnum>(this String description) where TEnum : struct
    {
        var type = typeof(TEnum);
        if (!type.IsEnum) throw new InvalidOperationException("type must be an enum");

        foreach (var field in type.GetFields())
        {
            var descAttr = field.GetCustomAttributes(typeof(DescriptionAttribute), false);
            if (descAttr != null && descAttr.Length > 0)
            {
                if (((DescriptionAttribute)descAttr[0]).Description == description)
                {
                    return (TEnum)field.GetValue(null);
                }
            }
            else if (field.Name == description)
            {
                return (TEnum)field.GetValue(null);
            }
        }
        return default(TEnum); // or throw new Exception();
    }
}

然后:

public enum CODES
{
    [Description("11")]
    Success,
    [Description("22")]
    Warning,
    [Description("33")]
    Error
}

// to enum
String response = "22";
CODES responseAsEnum = response.ToEnum<CODES>(); // CODES.Warning

// from enum
CODES status = CODES.Success;
String statusAsString = status.ToDescription(); // "11"