[C#] Enum, enum

 

 

 

https://learn.microsoft.com/ko-kr/dotnet/api/system.enum.getnames?view=net-9.0

Enum.GetNames 메서드 (System)

 

Enum value 이름들 가져오기

Enum.GetNames(typeof(InternalRuleCommand));

 

Enum 이름 가져오기

 case nameof(SomeEnum.SomeValue):

 

 

 

 

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Get Enum Description

 

public static class EnumHelper
{
    public static string Description(this Enum value)
    {
        var attributes = value.GetType().GetField(value.ToString()).GetCustomAttributes(typeof(DescriptionAttribute), false);
        if (attributes.Any())
            return (attributes.First() as DescriptionAttribute).Description;

        // If no description is found, the least we can do is replace underscores with spaces
        // You can add your own custom default formatting logic here
        TextInfo ti = CultureInfo.CurrentCulture.TextInfo;
        return ti.ToTitleCase(ti.ToLower(value.ToString().Replace("_", " ")));
    }

    public static IEnumerable<ValueDescription> GetAllValuesAndDescriptions(Type t)
    {
        if (!t.IsEnum)
            throw new ArgumentException($"{nameof(t)} must be an enum type");

        return Enum.GetValues(t).Cast<Enum>().Select((e) => new ValueDescription() { Value = e, Description = e.Description() }).ToList();
    }
}

 

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enum Description으로 value 가져오기

 

public static class EnumExtensions
{
    public static T GetValueFromDescription<T>(string description) where T : Enum
    {
        foreach (var field in typeof(T).GetFields())
        {
            var attribute = Attribute.GetCustomAttribute(field,
                typeof(DescriptionAttribute)) as DescriptionAttribute;
            if (attribute != null)
            {
                if (attribute.Description == description)
                    return (T)field.GetValue(null);
            }
            else
            {
                if (field.Name == description)
                    return (T)field.GetValue(null);
            }
        }
        throw new ArgumentException("Not found.", nameof(description));
    }
}

 

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