/// <summary>
 /// 返回userName所有上级数据(包括userName)
 /// By xzz 2010-12-1
 /// </summary>
 /// <param name="userNames"></param>
 /// <returns></returns>
 public IList <Agent> GetAgentByUserNames(string userNames)
 {
     return(agentService.GetAgentByUserNames(userNames));
 }