/// <summary>
/// 获得指定枚举值的第一个描述
/// （即获取枚举的自定义特性EnumDescriptionAttribute的Description属性）
/// </summary>
/// <param name="value">枚举值</param>
/// <param name="decriptionTag">对枚举的描述的分类标签</param>
/// <returns></returns>
public static string GetDescription(Enum value, int decriptionTag = 0)
{
if (value == null)
{
throw new ArgumentException("枚举参数value为空！");
}
string name = value.ToString();
string description = name;
var fieldInfo = value.GetType().GetField(name);
var attributes = (EnumDescriptionAttribute[])fieldInfo.GetCustomAttributes(typeof(EnumDescriptionAttribute), false);
if (attributes.Length > 0)
{
EnumDescriptionAttribute attribute = null;
foreach (var att in attributes)
{
if (att.DescriptionTag == decriptionTag)
{
attribute = att;
break;
}
}
description = attribute?.Description;
}
return(description);
}
/// <summary>
/// 获得枚举的所有枚举值的名称和第一个描述的键值对，T必须是枚举类型
/// </summary>
/// <param name="decriptionTag">对枚举的描述的分类标签</param>
/// <returns></returns>
public static Dictionary <string, string> GetNameAndDescriptionDict <T>(int decriptionTag) where T : struct
{
var enumType = typeof(T);
string[] names = Enum.GetNames(enumType);
Dictionary <string, string> result = new Dictionary <string, string>();
foreach (var name in names)
{
var fieldInfo = enumType.GetField(name);
var attributes = (EnumDescriptionAttribute[])fieldInfo.GetCustomAttributes(typeof(EnumDescriptionAttribute), false);
if (attributes.Length > 0)
{
EnumDescriptionAttribute attribute = null;
foreach (var att in attributes)
{
if (att.DescriptionTag == decriptionTag)
{
attribute = att;
break;
}
}
result.Add(name, attribute == null ? name : attribute.Description);
}
else
{
result.Add(name, name);
}
}
return(result);
}