Enum扩展特性实例代码

    /// <summary>/// 枚举帮助类/// </summary>public static class EnumTools
    {/// <summary>///  获取当前枚举值的描述和排序/// </summary>/// <param name="value"></param>/// <returns>返回元组Tuple(string,int)</returns>public static Tuple<string,int> GetDescription(this Enum value)
        {int order = 0;string description = string.Empty;

            Type type = value.GetType();// 获取枚举FieldInfo fieldInfo = type.GetField(value.ToString());// 获取枚举自定义的特性DescriptionAttributeobject[] attrs = fieldInfo.GetCustomAttributes(typeof(DescriptionAttribute), false);
            DescriptionAttribute attr = (DescriptionAttribute)attrs.FirstOrDefault(a => a is DescriptionAttribute);

            description = fieldInfo.Name;if (attr != null)
            {
                order = attr.Order;
                description = attr.Name;
            }return new Tuple<string,int>(description,order);

        }/// <summary>/// 获取当前枚举的所有描述/// </summary>/// <returns></returns>public static List<KeyValuePair<int, string>> GetAll<T>()
        {return GetAll(typeof(T));
        }/// <summary>/// 获取所有的枚举描述和值/// </summary>/// <param name="type"></param>/// <returns></returns>public static List<KeyValuePair<int, string>> GetAll(Type type)
        {

            List<EnumToolsModel> list = new List<EnumToolsModel>();// 循环枚举获取所有的Fieldsforeach (var field in type.GetFields())
            {// 如果是枚举类型if (field.FieldType.IsEnum)
                {object tmp = field.GetValue(null);
                    Enum enumValue = (Enum)tmp;int intValue = Convert.ToInt32(enumValue);var dec = enumValue.GetDescription();int order= dec.Item2;string showName = dec.Item1; // 获取描述和排序list.Add(new EnumToolsModel { Key = intValue, Name = showName, Order = order });
                }
            }// 排序并转成KeyValue返回return list.OrderBy(i => i.Order).Select(i => new KeyValuePair<int, string>(i.Key, i.Name)).ToList();

        }/// <summary>/// 枚举Model/// </summary> partial class EnumToolsModel
        {public int Order { get; set; }public string Name { get; set; }public int Key { get; set; }
        }

    }/// <summary>/// 枚举特性/// </summary>[AttributeUsage(AttributeTargets.Field, AllowMultiple = false, Inherited = false)]public class DescriptionAttribute : Attribute
    {/// <summary>/// 排序/// </summary>public int Order { get; set; }/// <summary>/// 名称/// </summary>public string Name { get; set; }/// <summary>/// 定义描述名称/// </summary>/// <param name="name">名称</param>public DescriptionAttribute(string name)
        {
            Name = name;
        }/// <summary>/// 定义描述名称和排序/// </summary>/// <param name="name">名称</param>/// <param name="order">排序</param>public DescriptionAttribute(string name, int order)
        {
            Name = name;
            Order = order;
        }

    }