[.NET]根据某个数值，获取Flags枚举所代表的所有值

来源：互联网发布：windows字体打包下载编辑：程序博客网时间：2024/05/21 10:35

public static IEnumerable<T> GetEnumValuesFromFlagsEnum<T>(Int32 value) where T : struct        {            T[] values = (T[])Enum.GetValues(typeof(T));            foreach (var itemValue in values)            {                if((value & Convert.ToInt32(itemValue)) != 0)                {                    yield return itemValue;                }            }        }

测试

[TestMethod]        public void GetEnumValuesFromFlagsEnumTestHelper()        {            var foods  = EnumHelper.GetEnumValuesFromFlagsEnum<Foods>(9);            Assert.AreEqual(2,foods.Count());            Assert.IsTrue(foods.Contains(Foods.主食));            Assert.IsTrue(foods.Contains(Foods.菜3));            foreach (var food in foods)            {                Console.WriteLine(food);            }        } [Flags] public enum Foods {        主食=1,        菜1 = 2,        菜2 = 4,        菜3=8,        菜4 = 16 }