添加枚举描述转枚举的方式

Jx.Toolbox.Test/EnumTest.cs

@@ -37,4 +37,14 @@ public void GetDescription()
         Assert.Equal("测试", TestEnum.test.GetDescription());
         Assert.Equal("test1", TestEnum.test1.GetDescription());
     }
+
+    [Fact]
+    public void GetEnumFromDescription()
+    {
+        Assert.Equal(TestEnum.test, "测试".GetValueFromDescription<TestEnum>());
+        Assert.Equal(TestEnum.test1, "test1".GetValueFromDescription<TestEnum>());
+        Assert.Equal(TestEnum.test, typeof(TestEnum).GetValueFromDescription("测试"));
+        Assert.Throws<ArgumentException>(() => typeof(EnumTest).GetValueFromDescription("测试"));
+        Assert.Throws<ArgumentException>(() => typeof(TestEnum).GetValueFromDescription("测试1"));
+    }
 }

Jx.Toolbox/Extensions/EnumExtension.cs

@@ -64,5 +64,50 @@ public static string GetDescription(this Enum @enum)
             var attr = field.GetCustomAttribute(typeof(DescriptionAttribute));
             return attr == null ? @enum.ToString() : (attr as DescriptionAttribute)?.Description;
         }
+
+        /// <summary>
+        /// 根据枚举的描述获取枚举
+        /// </summary>
+        /// <param name="description">描述</param>
+        /// <typeparam name="T">枚举类型</typeparam>
+        /// <returns></returns>
+        /// <exception cref="ArgumentException"></exception>
+        public static T GetValueFromDescription<T>(this string description) where T : Enum
+        {
+            var type = typeof(T);
+            return (T)GetValueFromDescription(type, description);
+        }
+
+        /// <summary>
+        /// 根据枚举的描述获取枚举
+        /// </summary>
+        /// <param name="enumType">枚举类型</param>
+        /// <param name="description">描述</param>
+        /// <returns></returns>
+        /// <exception cref="ArgumentException"></exception>
+        public static object GetValueFromDescription(this Type enumType, string description)
+        {
+            if (!enumType.IsEnum)
+            {
+                throw new ArgumentException("类型不是枚举类型");
+            }
+            foreach(var field in enumType.GetFields())
+            {
+                if (Attribute.GetCustomAttribute(field,
+                        typeof(DescriptionAttribute)) is DescriptionAttribute attribute)
+                {
+                    if (attribute.Description == description)
+                        return field.GetValue(null);
+                }
+                else
+                {
+                    if (field.Name == description)
+                        return field.GetValue(null);
+                }
+            }
+
+            throw new ArgumentException("未找到.", nameof(description));
+            // Or return default(T);
+        }
     }
 }

Jx.Toolbox/Jx.Toolbox.csproj

@@ -9,7 +9,7 @@
         <PackageProjectUrl>https://github.com/j4587698/Jx.Toolbox</PackageProjectUrl>
         <PackageLicenseExpression>MIT</PackageLicenseExpression>
         <PackageTags>tool</PackageTags>
-        <PackageVersion>0.3.1</PackageVersion>
+        <PackageVersion>0.3.2</PackageVersion>
     </PropertyGroup>
 
 </Project>

README.md

@@ -79,6 +79,8 @@ EnumExtension
 "字符串".ToEnum(转换失败返回枚举类型, 是否区分大小写); // 字符串转换为枚举类型，如果转换失败，则返回默认类型
 枚举类型.ToEnum(枚举字符串, 是否区分大小写); // 字符串转换为枚举类型
 枚举值.GetDescription(); // 获取枚举的Description，如果没有，则返回内容
+枚举类型.ToEnum(枚举描述); // 根据枚举的描述获取枚举
+"枚举描述字符串".ToEnum<枚举类型>(); // 根据枚举的描述获取枚举
 ```
 
 StringArrayExtension