关于c＃：如何获取枚举的属性

How to get attributes of enum

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Possible Duplicate:
Getting attributes of Enum’s value

这是我的课：

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[AttributeUsage(AttributeTargets.Field)]
public sealed class LabelAttribute : Attribute
{

public LabelAttribute(String labelName)
{
Name = labelName;
}

public String Name { get; set; }

}

我想得到属性的字段：

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public enum ECategory
{
[Label("Safe")]
Safe,
[Label("LetterDepositBox")]
LetterDepositBox,
[Label("SavingsBookBox")]
SavingsBookBox,
}

读取ecategory.safe label属性值：

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var type = typeof(ECategory);
var info = type.GetMember(ECategory.Safe.ToString());
var attributes = info[0].GetCustomAttributes(typeof(LabelAttribute), false);
var label = ((LabelAttribute)attributes[0]).Name;

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var fieldsMap = typeof(ECategory).GetFields()
.Where(fi => fi.GetCustomAttributes().Any(a => a is LabelAttribute))
.Select(fi => new
{
Value = (ECategory)fi.GetValue(null),
Label = fi.GetCustomAttributes(typeof(LabelAttribute), false)
.Cast<LabelAttribute>()
.Fist().Name
})
.ToDictionary(f => f.Value, f => f.Label);

然后，您可以检索每个值的标签，如下所示：

1	var label = fieldsMap[ECategory.Safe];

您可以创建扩展名：

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public static class CustomExtensions
{
public static string GetLabel(this ECategory value)
{
Type type = value.GetType();
string name = Enum.GetName(type, value);
if (name != null)
{
FieldInfo field = type.GetField(name);
if (field != null)
{
LabelAttribute attr = Attribute.GetCustomAttribute(field, typeof(LabelAttribute )) as LabelAttribute ;
if (attr != null)
{
return attr.Name;
}
}
}
return null;
}
}

然后你可以做：

1 2	var category = ECategory.Safe; var labelValue = category.GetLabel();