代码片段搜集

[ichengzi]

00. c# enum 读取attribute 扩展方法

public enum ApiStatus
{
    [Description("成功")]
    OK = 0,
    [Description("资源未找到")]
    NotFound = 2,
    [Description("拒绝访问")]
    AccessDenied = 3
}
static class EnumExtensions
{
    public static string GetDescription(this Enum val)
    {
        var field = val.GetType().GetField(val.ToString());
        var customAttribute = Attribute.GetCustomAttribute(field, typeof(DescriptionAttribute));
        if (customAttribute == null)
        {
            return val.ToString();
        }
        else
        {
            return ((DescriptionAttribute)customAttribute).Description;
        }
    }
}
static void Main(string[] args)
{
    Console.WriteLine(ApiStatus.Ok.GetDescription()); // "成功"
}