從描述屬性獲取Enum我有一個泛型擴展方法，它獲取Description屬性的Enum:enum Animal{
[Description("")]
NotSet = 0,
[Description("Giant Panda")]
GiantPanda = 1,
[Description("Lesser Spotted Anteater")]
LesserSpottedAnteater = 2}public static string GetDescription(this Enum value){
FieldInfo field = value.GetType().GetField(value.ToString());
DescriptionAttribute attribute = Attribute.GetCustomAttribute(field, typeof(DescriptionAttribute))
as DescriptionAttribute;
return attribute == null ? value.ToString() : attribute.Description;}所以我可以.。string myAnimal = Animal.GiantPanda.GetDescription(); // = "Giant Panda"現(xiàn)在，我試著在另一個方向上計算出等價的函數(shù)，就像.Animal a = (Animal)Enum.GetValueFromDescription("Giant Panda", typeof(Animal));
3 回答
拉風的咖菲貓
TA貢獻1995條經(jīng)驗 獲得超2個贊
public static class Utility{
public static string GetDescriptionFromEnumValue(Enum value)
{
DescriptionAttribute attribute = value.GetType()
.GetField(value.ToString())
.GetCustomAttributes(typeof (DescriptionAttribute), false)
.SingleOrDefault() as DescriptionAttribute;
return attribute == null ? value.ToString() : attribute.Description;
}
public static T GetEnumValueFromDescription<T>(string description)
{
var type = typeof(T);
if (!type.IsEnum)
throw new ArgumentException();
FieldInfo[] fields = type.GetFields();
var field = fields .SelectMany(f => f.GetCustomAttributes(
typeof(DescriptionAttribute), false), (
f, a) => new { Field = f, Att = a })
.Where(a => ((DescriptionAttribute)a.Att)
.Description == description).SingleOrDefault();
return field == null ? default(T) : (T)field.Field.GetRawConstantValue();
}}var result1 = Utility.GetDescriptionFromEnumValue( Animal.GiantPanda);var result2 = Utility.GetEnumValueFromDescription<Animal>( "Lesser Spotted Anteater");
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