关于枚举enum的tostring方法不能重写的一种替代方案
2009-05-02 17:18 kenty06 阅读(1224) 评论(0) 编辑 收藏 举报本文内容来源 http://blogs.msdn.com/abhinaba/archive/2005/10/20/483000.aspx
在.net 中,枚举的ToString 方法不能够被重写,有时候我们不想直接显示枚举的标识的时候,想已另一种方式替代显示内容,就可以采取下面介绍的这种方式来实现。
using System;
using System.Reflection;
enum Coolness : byte
{
[Description("Not so cool")]
NotSoCool = 5,
Cool, // since description same as ToString no attr are used
[Description("Very cool")]
VeryCool = NotSoCool + 7,
[Description("Super cool")]
SuperCool
}
class Description : Attribute
{
public string Text;
public Description(string text)
{
Text = text;
}
}
class Program
{
static string GetDescription(Enum en)
{
Type type = en.GetType();
MemberInfo[] memInfo = type.GetMember(en.ToString());
if (memInfo != null && memInfo.Length > 0)
{
object[] attrs = memInfo[0].GetCustomAttributes(typeof(Description),
false);if (attrs != null && attrs.Length > 0)
return ((Description)attrs[0]).Text;
}
return en.ToString();
}
static void Main(string[] args)
{
Coolness coolType1 = Coolness.Cool;
Coolness coolType2 = Coolness.NotSoCool;
Console.WriteLine(GetDescription(coolType1));
Console.WriteLine(GetDescription(coolType2));
}
}