C# 获取Enum 描述

public class EnumHelper
    {

        /// <summary>
        /// get all information of enum,include value,name and description
        /// </summary>
        /// <param name="enumName">the type of enumName</param>
        /// <returns></returns>
        public static List<dynamic> GetAllItems(Type enumName)
        {
            List<dynamic> list = new List<dynamic>();
            // get enum fileds
            FieldInfo[] fields = enumName.GetFields();
            foreach (FieldInfo field in fields)
            {
                if (!field.FieldType.IsEnum)
                {
                    continue;
                }
                // get enum value
                int value = (int)enumName.InvokeMember(field.Name, BindingFlags.GetField, null, null, null);
                string text = field.Name;
                string description = string.Empty;
                object[] array = field.GetCustomAttributes(typeof(DescriptionAttribute), false);
                if (array.Length > 0)
                {
                    description = ((DescriptionAttribute)array[0]).Description;
                }
                else
                {
                    description = ""; //none description,set empty
                }
                //add to list
                dynamic obj = new ExpandoObject();
                obj.Value = value;
                obj.Text = text;
                obj.Description = description;
                list.Add(obj);
            }
            return list;
        }

        public static List<string> GetEnumDescriptions(Type enumType)
        {
            List<string> nameList = new List<string>();
            foreach (var e in Enum.GetValues(enumType))
            {
                // 转换成Description后添加至List
                object objArr = e.GetType().GetField(e.ToString()).GetCustomAttributes(typeof(DescriptionAttribute), true)[0];
                nameList.Add((objArr as DescriptionAttribute).Description);
            }
            return nameList;
        }

        /// <summary>
        /// get enum description by name
        /// </summary>
        /// <typeparam name="T">enum type</typeparam>
        /// <param name="enumItemName">the enum name</param>
        /// <returns></returns>
        public static string GetDescriptionByName<T>(T enumItemName)
        {
            FieldInfo fi = enumItemName.GetType().GetField(enumItemName.ToString());

            DescriptionAttribute[] attributes = (DescriptionAttribute[])fi.GetCustomAttributes(
                typeof(DescriptionAttribute), false);

            if (attributes != null && attributes.Length > 0)
            {
                return attributes[0].Description;
            }
            else
            {
                return enumItemName.ToString();
            }
        }

    }

 

　　

 

调用

    public enum CameraIndex
    {
        [Description("入料定位相机")]
        MoveInCamera,
        [Description("异物检测相机")]
        RarityCamera,
        [Description("Sealant上检测相机")]
        SealantUpCamera,
        [Description("Sealant下检测相机")]
        SealantButtomCamera,
        [Description("顶部拍照相机")]
        TopCamera,
    }

List<string> strList = EnumHelper.GetEnumDescriptions(typeof(CameraIndex));
            List<dynamic> data = EnumHelper.GetAllItems(typeof(CameraIndex));

            CameraIndex cam = CameraIndex.MoveInCamera;
            string itemDesrip = EnumHelper.GetDescriptionByName<CameraIndex>(cam);
            string desp = data[0].Description;
            int val = data[0].Value;