c#中Enum类型定义与获取值或描述方法- 半语小马哥- CSDNBlog

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这里定义一个枚举如下:

 

        /**//// <summary>
        /// 用户状态枚举
        /// </summary>
        [Flags]
        public enum UserFlag
        ...{
            [Description("启用")]
            UnForbidden = 1,
            [Description("禁用")]
            Forbidden = 2,
            [Description("删除")]
            Deleted = 4
        }

下面定义两个枚举类型操作函数:

 


        /**//// <summary>
        ///  根据枚举类型返回类型中的所有 ,文本及描述
        /// </summary>
        /// <param  name="type"></param>
        /// <returns>返回三列数组,第0列为Description,第1列为Value,第2列为Text</returns>
        public static List<string[]> GetEnumOpt(Type type)
        ...{
            List<string[]> Strs = new List<string[]>();
            FieldInfo[] fields = type.GetFields();
            for (int i = 1, count = fields.Length; i < count; i++)
            ...{
                string[] strEnum = new string[3];
                FieldInfo  field = fields[i];
                //
                strEnum[1] = ((int)Enum.Parse(type,  field. Name)).ToString();
                //文本列赋
                strEnum[2] =  field. Name;

                object[] objs =  field.GetCustomAttributes(typeof(DescriptionAttribute), false);
                if (objs == null || objs.Length == 0)
                ...{
                    strEnum[0] =  field. Name;
                }
                else
                ...{
                    DescriptionAttribute da = (DescriptionAttribute)objs[0];
                    strEnum[0] = da.Description;
                }

                Strs.Add(strEnum);
            }
            return Strs;
        }

        /**//// <summary>
        ///  获取枚举类子项描述信息
        /// </summary>
        /// <param  name="enumSubitem">枚举类子项</param>        
        public static string GetEnumDescription(object enumSubitem)
        ...{
            enumSubitem=(Enum)enumSubitem;
            string strValue = enumSubitem.ToString();

            FieldInfo fieldinfo = enumSubitem.GetType().GetField(strValue);

            if (fieldinfo != null)
            ...{

                Object[] objs = fieldinfo.GetCustomAttributes(typeof(DescriptionAttribute), false);

                if (objs == null || objs.Length == 0)
                ...{
                    return strValue;
                }
                else
                ...{
                    DescriptionAttribute da = (DescriptionAttribute)objs[0];
                    return da.Description;
                }
            }
            else
            ...{
                return "不限";
            }

        }

其中  public static List<string[]> GetEnumOpt(Type type) 函数为获取一个枚举类型所有选项并添加到List<string[]>中,为前台控件绑定提供数据源,前台示例代码如下:

            List<string[]> strEnums = EnumDefine.GetEnumOpt(typeof(EnumDefine.UserFlag));
            foreach (string[] strEnum in strEnums)
            {
                ddlUserType.Items.Add(new ListItem(strEnum[0], strEnum[1]));
            }

而  public static string GetEnumDescription(object enumSubitem)函数则为获取某一项文字描述信息项函数,前台可以通过调用该类型获取该类型的文字描述,示例代码如下:

EnumDefine.GetEnumDescription(UserFlag.UnForbidden)

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