public static List<AriticleGroup> SearchGroupNameByUserId(int userId)
        {
            List<AriticleGroup> groups = new List<AriticleGroup>();
            string sql = string.Format("select groupId,groupName from AriticleGroup where userId={0}", userId);
            SqlDataReader reader = ConnectionSQL.ExecuteSelect(sql);
            AriticleGroup group = null;
            while (reader.Read())
            {
                group = new AriticleGroup();
                group.AriticleGroupId = (int)reader["groupId"];
                group.AriticleGroupName = reader["groupName"].ToString();
                groups.Add(group);
            }
            reader.Close();
            ConnectionSQL.CloseConn();
            return groups;
        }