添加项目文件。

OrpaonEMS.App/Com/EnumExtension.cs

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+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace OrpaonEMS.App.Com
+{
+    public static class EnumExtension
+    {
+        #region 获取枚举描述内容
+
+        public static Attribute GetEnumAttribute(this Enum value, Type attribute)
+        {
+            var enumType = value.GetType();
+            var name = Enum.GetName(enumType, value);
+            if (name != null)
+            {
+                // 获取枚举字段。
+                var fieldInfo = enumType.GetField(name);
+                if (fieldInfo != null)
+                {
+                    // 获取描述的属性。
+                    var attr = Attribute.GetCustomAttribute(fieldInfo,
+                        attribute, false);
+                    return attr;
+                }
+            }
+            return null;
+        }
+
+        public static T GetEnumAttribute<T>(this Enum value)
+        {
+            var enumType = value.GetType();
+            var name = Enum.GetName(enumType, value);
+            if (name != null)
+            {
+                // 获取枚举字段。
+                var fieldInfo = enumType.GetField(name);
+                if (fieldInfo != null)
+                {
+                    // 获取描述的属性。
+                    var attr = Attribute.GetCustomAttribute(fieldInfo, typeof(T), false);
+                    return (T)(object)attr;
+                }
+            }
+            return default(T);
+        }
+
+        /// <summary>
+        /// 获取枚举描述内容;
+        /// </summary>
+        /// <param name="value"></param>
+        /// <param name="defaultval"></param>
+        /// <returns></returns>
+        public static string GetEnumDescription(this Enum value, string defaultval = "")
+        {
+            var attr = GetEnumAttribute(value, typeof(DescriptionAttribute));
+            return (attr as DescriptionAttribute)?.Description ?? defaultval;
+        }
+
+        #endregion
+
+        #region 获取枚举列表
+
+        /// <summary>
+        /// 通过枚举对象获取枚举列表
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static List<T> GetEnumList<T>(this T value)
+        {
+            var list = new List<T>();
+            if (value is Enum)
+            {
+                var valData = Convert.ToInt32((T)Enum.Parse(typeof(T), value.ToString()));
+                var tps = Enum.GetValues(typeof(T));
+
+                list.AddRange(from object tp in tps where ((int)Convert.ToInt32((T)Enum.Parse(typeof(T), tp.ToString())) & valData) == valData select (T)tp);
+            }
+
+            return list;
+        }
+
+        /* 参考：https://www.codenong.com/17123548/ */
+
+        /// <summary>
+        /// 通过枚举类型获取枚举列表;
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static List<T> GetEnumList<T>() where T : Enum
+        {
+            List<T> list = Enum.GetValues(typeof(T)).OfType<T>().ToList();
+            return list;
+        }
+
+        /* 参考：https://www.codenong.com/105372/ */
+
+        /// <summary>
+        /// Gets all items for an enum value.（通过枚举对象获取所有枚举）
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value">The value.</param>
+        /// <returns></returns>
+        public static IEnumerable<T> GetAllItems<T>(this Enum value)
+        {
+            foreach (object item in Enum.GetValues(typeof(T)))
+            {
+                yield return (T)item;
+            }
+        }
+
+        /// <summary>
+        /// Gets all items for an enum type.（通过枚举类型获取所有枚举）
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <returns></returns>
+        public static IEnumerable<T> GetAllItems<T>() where T : struct
+        {
+            foreach (object item in Enum.GetValues(typeof(T)))
+            {
+                yield return (T)item;
+            }
+        }
+
+        #endregion
+
+        /// <summary>
+        /// 将枚举转换为值
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static T ToValue<T>(this Enum value) where T : struct
+        {
+            return (T)(object)value;
+        }
+    }
+}