使用用户友好的字符串枚举 ToString [英] Enum ToString with user friendly strings

问题描述

我的枚举由以下值组成:

My enum consists of the following values:

private enum PublishStatusses{
    NotCompleted,
    Completed,
    Error
};

不过，我希望能够以用户友好的方式输出这些值.
我不需要能够再次从字符串到值.

I want to be able to output these values in a user friendly way though.
I don't need to be able to go from string to value again.

推荐答案

我使用 Description 属性来自 System.ComponentModel 命名空间.简单地装饰枚举:

I use the Description attribute from the System.ComponentModel namespace. Simply decorate the enum:

private enum PublishStatusValue
{
    [Description("Not Completed")]
    NotCompleted,
    Completed,
    Error
};

然后使用此代码检索它:

Then use this code to retrieve it:

public static string GetDescription<T>(this T enumerationValue)
    where T : struct
{
    Type type = enumerationValue.GetType();
    if (!type.IsEnum)
    {
        throw new ArgumentException("EnumerationValue must be of Enum type", "enumerationValue");
    }

    //Tries to find a DescriptionAttribute for a potential friendly name
    //for the enum
    MemberInfo[] memberInfo = type.GetMember(enumerationValue.ToString());
    if (memberInfo != null && memberInfo.Length > 0)
    {
        object[] attrs = memberInfo[0].GetCustomAttributes(typeof(DescriptionAttribute), false);

        if (attrs != null && attrs.Length > 0)
        {
            //Pull out the description value
            return ((DescriptionAttribute)attrs[0]).Description;
        }
    }
    //If we have no description attribute, just return the ToString of the enum
    return enumerationValue.ToString();
}

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