初始化项目

Services/Extensions/EnumerableExtensions.cs

@@ -0,0 +1,130 @@
+using System;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Reflection;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Services.Extensions
+{
+    /// <summary>
+    /// 枚举扩展
+    /// </summary>
+    public static class EnumerableExtensions
+    {
+        /// <summary>
+        /// 对枚举器的每个元素执行指定的操作
+        /// </summary>
+        /// <typeparam name="T">枚举器类型参数</typeparam>
+        /// <param name="source">枚举器</param>
+        /// <param name="action">要对枚举器的每个元素执行的委托</param>
+        public static void ForEach<T>(this IEnumerable<T> source, Action<T> action)
+        {
+            if (source.IsNullOrEmpty<T>() || action == null)
+            {
+                return;
+            }
+            foreach (T obj in source)
+            {
+                action(obj);
+            }
+        }
+
+        /// <summary>
+        /// 指示指定的枚举器是null还是没有任何元素
+        /// </summary>
+        /// <typeparam name="T">枚举器类型参数</typeparam>
+        /// <param name="source">要测试的枚举器</param>
+        /// <returns>true:枚举器是null或者没有任何元素 false:枚举器不为null并且包含至少一个元素</returns>
+        public static bool IsNullOrEmpty<T>(this IEnumerable<T> source)
+        {
+            return source == null || !source.Any<T>();
+        }
+
+        /// <summary>
+        /// 得到枚举中文备注
+        /// </summary>
+        /// <param name="enumValue"></param>
+        /// <returns></returns>
+        public static string GetEnumDesc(this System.Enum enumValue)
+        {
+            string value = enumValue.ToString();
+            System.Reflection.FieldInfo field = enumValue.GetType().GetField(value);
+            object[] objs = field.GetCustomAttributes(typeof(DescriptionAttribute), false);    //获取描述属性
+            if (objs.Length == 0)    //当描述属性没有时，直接返回名称
+                return value;
+            DescriptionAttribute descriptionAttribute = (DescriptionAttribute)objs[0];
+            return descriptionAttribute.Description;
+        }
+
+        public static string GetEnumDesc(this Type enumType, object val)
+        {
+            string enumvalue = Enum.GetName(enumType, val);
+            if (string.IsNullOrEmpty(enumvalue))
+            {
+                return "";
+            }
+            FieldInfo finfo = enumType.GetField(enumvalue);
+            object[] enumAttr = finfo.GetCustomAttributes(typeof(DescriptionAttribute), true);
+            if (enumAttr.Length > 0)
+            {
+                DescriptionAttribute desc = (DescriptionAttribute)enumAttr[0];
+                if (desc != null)
+                {
+                    return desc.Description;
+                }
+            }
+            return enumvalue;
+        }
+
+        /// <summary>
+        /// 获取所有的枚举描述和值
+        /// </summary>
+        /// <param name="type"></param>
+        /// <returns></returns>
+        public static List<EnumDto> GetEnumListItem(this Type type)
+        {
+
+            List<EnumDto> list = new List<EnumDto>();
+
+            // 循环枚举获取所有的Fields
+            foreach (var field in type.GetFields())
+            {
+                // 如果是枚举类型
+                if (field.FieldType.IsEnum)
+                {
+                    object tmp = field.GetValue(null);
+                    Enum enumValue = (Enum)tmp;
+                    int intValue = Convert.ToInt32(enumValue);
+                    string showName = enumValue.GetEnumDesc(); // 获取描述和排序
+                    list.Add(new EnumDto { Value = intValue, Description = showName });
+                }
+            }
+            //返回
+            return list;
+
+        }
+
+        public class EnumDto
+        {
+            /// <summary>
+            /// 枚举code
+            /// </summary>
+            public string Code { get; set; }
+
+            /// <summary>
+            /// 值
+            /// </summary>
+            public int Value { get; set; }
+
+            /// <summary>
+            /// 描述
+            /// </summary>
+            public string Description { get; set; }
+        }
+
+    }
+
+}