c# Enum获取name,value和description

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波霸38

最新推荐文章于 2025-03-24 07:51:34 发布

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c# Enum获取name,value和description

如果我们的枚举类型结构如下,我们需要获取enum的name,value以及description

public enum EnumTest
    {
        [Description("Attribute")]
        Attribute1 = 1,
        [Description("Attribute")]
        Attribute2 = 2,
        [Description("Measure")]
        Measure1 = 3,
        [Description("Measure")]
        Measure2 = 4
    }

获取的函数代码如下:

 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;
        }


        /// <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();
            }
        }

    }