c# Enum获取name,value和description

谁践踏了优雅 2022-04-24 05:10 293阅读 0赞

# [c\# Enum获取name,value和description][c_ Enum_name_value_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();
                }
            }
    
        }

posted @ 2019-02-11 14:10 [波霸38][38] 阅读( ...) 评论( ...) [编辑][Link 1] 收藏

[c_ Enum_name_value_description]: https://www.cnblogs.com/sharing1986687846/p/10361682.html
[38]: https://www.cnblogs.com/sharing1986687846/
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