/// 学科

/// </summary>

public enum Subject

{

     None = ,

     [Description("语文")]

     Chinese = , 

     [Description("数学")]

     Mathematics = , 

     [Description("英语")]

     English = , 

     [Description("政治")]

     Politics = , 

     [Description("物理")]

     Physics = , 

     [Description("化学")]

     Chemistry = , 

     [Description("历史")]

     History = , 

     [Description("地理")]

     Geography = , 

     [Description("生物")]

     Biology =

}

/// 枚举辅助类

    /// </summary>

    public static class EnumHelper

    {

        /// <summary>

        /// 获得枚举类型数据项（不包括空项）

        /// </summary>

        /// <param name="enumType">枚举类型</param>

        /// <returns></returns>

        public static IList<object> GetItems(this Type enumType)

        {

            if (!enumType.IsEnum)

                throw new InvalidOperationException();

            IList<object> list = new List<object>();

            // 获取Description特性

            Type typeDescription = typeof(DescriptionAttribute);

            // 获取枚举字段

            FieldInfo[] fields = enumType.GetFields();

            foreach (FieldInfo field in fields)

            {

                if (!field.FieldType.IsEnum)

                    continue;

                 // 获取枚举值

                int value = (int)enumType.InvokeMember(field.Name, BindingFlags.GetField, null, null, null);

                // 不包括空项

                if (value > )

                {

                    string text = string.Empty;

                    object[] array = field.GetCustomAttributes(typeDescription, false);

                    if (array.Length > ) text = ((DescriptionAttribute)array[]).Description;

                    else text = field.Name; //没有描述，直接取值

                    //添加到列表

                    list.Add(new { Value = value, Text = text });

                }

            }

            return list;

        }

    }

ddlSubject.DataSource = typeof(Subject).GetItems();

ddlSubject.DataTextField = "Text";

ddlSubject.DataValueField = "Value";

ddlSubject.DataBind();