AbsDB conn = DBConn.GetDBConn();

                String strSql = "select 内容 from sys_dict where 分类名称 = '角色管理'";

                OracleDataReader oraRead = conn.ExecuteReader(CommandType.Text,strSql,null);

                while (oraRead.Read())
                ...{
                    listBoxRoles.Items.Add(oraRead.GetString(0));
                }

                if (conn.Open)
                ...{
                    conn.Close();
                }
数据库的连接自己更换一下。

Combox的形式替换如下

DropDownList.Items.Add(tempStr);