/// <summary>
        /// 更新占成
        /// By xzz
        /// 2010-10-8
        /// </summary>
        /// <param name="userName"></param>
        /// <param name="percent"></param>
        /// <param name="roleId"></param>
        /// <returns></returns>
        public static string UpdatePercent(int ID, double percent, int roleId)
        {
            double maxPercent = 0;
            double UpPercent  = 10;
            object ob;

            if (roleId == 5)
            {
                UserService userService = new UserService();
                ob = userService.GetMaxPercentByUserName(ID);
                if (!Convert.IsDBNull(ob))
                {
                    maxPercent = Convert.ToDouble(ob);
                }
            }
            else
            {
                ob = agentService.GetMaxPercentByUserName(ID);
                if (!Convert.IsDBNull(ob))
                {
                    maxPercent = Convert.ToDouble(ob);
                }
            }

            Agent agent = GetAgentByPK(ID);

            if (agent != null)
            {
                if (roleId != 2)
                {
                    Agent upAgent = GetAgentByPK(agent.UpUserID);
                    if (upAgent != null)
                    {
                        UpPercent = upAgent.Percent;
                    }
                }
            }



            if (percent < maxPercent)
            {
                return("不能小于下级最大占成:" + maxPercent.ToString(""));
            }
            else if (percent > UpPercent)
            {
                return("不能大于上级占成:" + UpPercent.ToString(""));
            }
            else
            {
                if (agentService.UpdatePercent(percent, ID))
                {
                    //更新会员占成
                    if (roleId == 5)
                    {
                        agentService.UpdatePercentAll(UpPercent - percent, percent, agent.RoleId, agent.UserName);
                    }
                    else
                    {
                        IList <Agent> nextAgents = agentService.GetAgentByupUsername(agent.UserName);
                        foreach (Agent info in nextAgents)
                        {
                            agentService.UpdatePercentAll(UpPercent - percent, percent - info.Percent, agent.RoleId, info.UserName);
                        }
                    }
                    return("ok");
                }
                else
                {
                    return("更新失败");
                }
            }
        }