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Get enum from enum attribute
Get enum from enum attribute
我希望以最可维护的方式绑定枚举,并将它与关联的本地化字符串值相关联.
如果我把枚举和类放在同一个文件中,我觉得有些安全,但我必须假设有更好的方法.我还考虑过将枚举名称与资源字符串名称相同,但我担心我不能总是在这里强制执行.
using CR = AcmeCorp.Properties.Resources;
public enum SourceFilterOption
{
LastNumberOccurences,LastNumberWeeks,DateRange
// if you add to this you must update FilterOptions.GetString
}
public class FilterOptions
{
public Dictionary<SourceFilterOption,String> GetEnumWithResourceString()
{
var dict = new Dictionary<SourceFilterOption,String>();
foreach (SourceFilterOption filter in Enum.GetValues(typeof(SourceFilterOption)))
{
dict.Add(filter,GetString(filter));
}
return dict;
}
public String GetString(SourceFilterOption option)
{
switch (option)
{
case SourceFilterOption.LastNumberOccurences:
return CR.LAST_NUMBER_OF_OCCURANCES;
case SourceFilterOption.LastNumberWeeks:
return CR.LAST_NUMBER_OF_WEEKS;
case SourceFilterOption.DateRange:
default:
return CR.DATE_RANGE;
}
}
}
解决方法
您可以将DescriptionAttribute添加到每个枚举值.
public enum SourceFilterOption
{
[Description("LAST_NUMBER_OF_OCCURANCES")]
LastNumberOccurences,...
}
在需要时拉出描述(资源键).
FieldInfo fi = value.GetType().GetField(value.ToString());
DescriptionAttribute[] attributes = (DescriptionAttribute[])fi.GetCustomAttributes(typeof(DescriptionAttribute),if (attributes.Length > 0)
{
return attributes[0].Description;
}
else
{
return value.ToString();
}
编辑：对评论的回应(@Tergiver).在我的示例中使用(现有)DescriptionAttribute是为了快速完成工作.您最好实现自己的自定义属性,而不是使用其目的之外的属性.像这样的东西：
[AttributeUsage(AttributeTargets.Field,AllowMultiple = false,Inheritable = false)]
public class EnumResourceKeyAttribute : Attribute
{
public string ResourceKey { get; set; }
}
