C#可以通过反射，来获取枚举的描述信息或通过描述信息获取到指定类型的枚举
/// <summary>
/// 获取枚举描述
/// </summary>
/// <param name="enumName"></param>
/// <returns></returns>
public static string GetDescription(this Enum enumName)
{
string description;
FieldInfo fieldInfo = enumName.GetType().GetField(enumName.ToString());
DescriptionAttribute[] attributes = fieldInfo.GetDescriptAttr();
if (attributes != null && attributes.Length > )
description = attributes[].Description;
else
throw new ArgumentException($"{enumName} 未能找到对应的枚举描述.", nameof(enumName));
return description;
} /// <summary>
/// 获取枚举描述属性
/// </summary>
/// <param name="fieldInfo"></param>
/// <returns></returns>
private static DescriptionAttribute[] GetDescriptAttr(this FieldInfo fieldInfo)
{
return (DescriptionAttribute[])fieldInfo?.GetCustomAttributes(typeof(DescriptionAttribute), false);
} /// <summary>
/// 通过描述获取枚举值
/// </summary>
/// <typeparam name="TEnum"></typeparam>
/// <param name="description"></param>
/// <returns></returns>
public static TEnum GetEnum<TEnum>(string description)
{
Type type = typeof(TEnum);
foreach (FieldInfo field in type.GetFields())
{
DescriptionAttribute[] curDesc = field.GetDescriptAttr();
if (curDesc != null && curDesc.Length > )
{
if (curDesc[].Description == description)
return (TEnum)field.GetValue(null);
}
else
{
if (field.Name == description)
return (TEnum)field.GetValue(null);
}
}
throw new ArgumentException($"{description} 未能找到对应的枚举.", nameof(description));
}