您是否可以访问特定枚举值的长描述

Question

我通常访问枚举描述以获得相应的值,例如:

Enum.GetName(typeof(MyEnum),myid);

我需要一个可以使用任何字符的枚举,例如"hello world%^ $£%&"

我见过有人附加属性并添加扩展名,如下所示:

http://weblogs.asp.net/stefansedich/archive/2008/03/12/enum-with-string-values-in-c.aspx

但如果可以用来访问长描述,我无法解决.

有人做过类似的事吗？

谢谢

戴维

Answer 1

为什么不能解决问题呢？

您可以通过从属性中继承来创建自己的属性

public class EnumInformation: Attribute
{
    public string LongDescription { get; set; }
    public string ShortDescription { get; set; }
}

public static string GetLongDescription(this Enum value) 
{
    // Get the type
    Type type = value.GetType();

    // Get fieldinfo for this type
    FieldInfo fieldInfo = type.GetField(value.ToString());

    // Get the stringvalue attributes
    EnumInformation [] attribs = fieldInfo.GetCustomAttributes(
        typeof(EnumInformation ), false) as EnumInformation [];

    // Return the first if there was a match.
    return attribs != null && attribs.Length > 0 ? attribs[0].LongDescription : null;
}

public static string GetShortDescription(this Enum value) 
{
    // Get the type
    Type type = value.GetType();

    // Get fieldinfo for this type
    FieldInfo fieldInfo = type.GetField(value.ToString());

    // Get the stringvalue attributes
    EnumInformation [] attribs = fieldInfo.GetCustomAttributes(
        typeof(EnumInformation ), false) as EnumInformation [];

    // Return the first if there was a match.
    return attribs != null && attribs.Length > 0 ? attribs[0].ShortDescription : null;
}

你的Enum看起来像这样

public enum MyEnum
{
    [EnumInformation(LongDescription="This is the Number 1", ShortDescription= "1")]
    One,
    [EnumInformation(LongDescription = "This is the Number Two", ShortDescription = "2")]
    Two
}

你可以这样使用它

MyEnum test1 = MyEnum.One;

Console.WriteLine("test1.GetLongDescription = {0}", test1.GetLongDescription());
Console.WriteLine("test1.GetShortDescription = {0}", test1.GetShortDescription());

它输出

test1.GetLongDescription =这是数字1

test1.GetShortDescription = 1

您实际上可以向属性添加属性以获取各种信息.然后,您可以支持您正在寻找的本地化.