由于对英语的天生缺陷，在枚举时一直使用中文，这样就不用看注释就知道枚举意思，今天看到博文
使用特性代替了直接使用中文作为属性。特意摘抄部分为以后使用方便
/// <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;
}
}
view code
把原文中的out参数替换成返回元组，由于项目是vs2015开发，不能用c#7.0特性，否则用7.0中的值元组应该更好一点。性能和显示友好性都会有改进。
以上就是enum扩展特性实例代码的详细内容。