实现：根据定义的枚举，展示下拉框

 

 

解决：

1、 页面

<td  style="white-space: nowrap" align="right">&nbsp;单位等级：<asp:DropDownList ID="ddle_DeptLevel_i" runat="server" width="121px"></asp:DropDownList></td>

2、数据库中的定义

3、赋值 

   {//单位等级,普通=0,重要=1,非常重要=2
            Dictionary<int,string> dicall = ITEM.Inherits.Bll.CollEnum_Mis4.e_DeptLevel.GetDicAll();
            this.ddle_DeptLevel_i.Items.Clear();
            foreach(int ikey in dicall.Keys)
            {
                this.ddle_DeptLevel_i.Items.Add(new ListItem(dicall[ikey].ToString(),ikey.ToString()));
            }
            this.ddle_DeptLevel_i.Items.Insert(0,new ListItem());
        }

枚举中的 GetDicAll() 方法

         public static Dictionary<int, string> GetDicAll()
            {
                Dictionary<int, string> dic = new Dictionary<int, string>();
                dic.Add((int)Enum.普通, Enum.普通.ToString());
                dic.Add((int)Enum.重要, Enum.重要.ToString());
                dic.Add((int)Enum.非常重要, Enum.非常重要.ToString());
                return dic;
            }

枚举定义

        #region e_DeptLevel,单位等级,普通=0,重要=1,非常重要=2
        /// <summary>
        /// e_DeptLevel,单位等级,普通=0,重要=1,非常重要=2
        /// </summary>
        public struct e_DeptLevel
        {
            /// <summary>
            ///e_DeptLevel,单位等级,普通=0,重要=1,非常重要=2
            /// </summary>
            public enum Enum
            {
                普通 = 0,
                重要 = 1,
                非常重要 = 2,
            }
            /// <summary>
            /// 获取整数集合
            /// </summary>
            /// <returns></returns>
            public static string GetIntAll()
            {
                string s = string.Empty;
                Dictionary<int, string> dic = GetDicAll();
                foreach (int key in dic.Keys)
                {
                    string sign = s == string.Empty ? "" : ",";
                    s += sign + key.ToString();
                }
                return s;
            }
            /// <summary>
            /// 获取字符集合
            /// </summary>
            /// <returns></returns>
            public static string GetStringAll()
            {
                string s = string.Empty;
                Dictionary<int, string> dic = GetDicAll();
                foreach (int key in dic.Keys)
                {
                    string sign = s == string.Empty ? "" : ",";
                    s += sign + dic[key].ToString();
                }
                return s;
            }
            /// <summary>
            /// 获取所有的枚举类型
            /// </summary>
            /// <returns></returns>
            public static Dictionary<int, string> GetDicAll()
            {
                Dictionary<int, string> dic = new Dictionary<int, string>();
                dic.Add((int)Enum.普通, Enum.普通.ToString());
                dic.Add((int)Enum.重要, Enum.重要.ToString());
                dic.Add((int)Enum.非常重要, Enum.非常重要.ToString());
                return dic;
            }
            /// <summary>
            /// 枚举转化
            /// </summary>
            public static string GetStringByEnum(Enum e)
            {
                return e.ToString();
            }
            /// <summary>
            /// 枚举转化
            /// </summary>
            public static string GetStringByInt(int i)
            {
                if (i == (int)Enum.普通) return Enum.普通.ToString();
                else if (i == (int)Enum.重要) return Enum.重要.ToString();
                else if (i == (int)Enum.非常重要) return Enum.非常重要.ToString();
                else
                {
                    Exception ex = new Exception("Enum 转化错误");
                    throw ex;
                }
            }
            /// <summary>
            /// 枚举转化
            /// </summary>
            public static Enum GetEnumByString(string s)
            {
                if (s == Enum.普通.ToString()) return Enum.普通;
                else if (s == Enum.重要.ToString()) return Enum.重要;
                else if (s == Enum.非常重要.ToString()) return Enum.非常重要;
                else
                {
                    Exception ex = new Exception("Enum 转化错误");
                    throw ex;
                }
            }
            /// <summary>
            /// 枚举转化
            /// </summary>
            public static Enum GetEnumByString(int i)
            {
                if (i == (int)Enum.普通) return Enum.普通;
                else if (i == (int)Enum.重要) return Enum.重要;
                else if (i == (int)Enum.非常重要) return Enum.非常重要;
                else
                {
                    Exception ex = new Exception("Enum 转化错误");
                    throw ex;
                }
            }
            /// <summary>
            /// 枚举转化
            /// </summary>
            public static int GetIntByEnum(Enum e)
            {
                return (int)e;
            }
            /// <summary>
            /// 枚举转化
            /// </summary>
            public static int GetIntByString(string s)
            {
                Enum e = GetEnumByString(s);
                return GetIntByEnum(e);
            }
        }
        #endregion