public static string adddpt(string schid, string dptname, string pid, string stat)
        {
            schid   = Com.Public.SqlEncStr(schid);
            dptname = Com.Public.SqlEncStr(dptname);
            pid     = Com.Public.SqlEncStr(pid);
            stat    = Com.Public.SqlEncStr(stat);
            string ret = "";

            if (Com.Session.userid == null)
            {
                ret = "expire";
            }
            else
            {
                try
                {
                    SchSystem.BLL.SchDepartInfo bll = new SchSystem.BLL.SchDepartInfo();
                    DataTable dtTopOrderOne         = bll.GetList("top 1 OrderId", "Schid='" + schid + "' and Pid='" + pid + "' Order By OrderId Desc").Tables[0];
                    DataRow[] drTopOrderOne         = dtTopOrderOne.Select();
                    int       OrderId = 0;
                    if (dtTopOrderOne.Rows.Count == 0)//如果子类为空,设置OrderId默认值为0;
                    {
                        OrderId = 0;
                    }
                    else//否则,获取最大值并加1
                    {
                        foreach (DataRow item in drTopOrderOne)
                        {
                            OrderId = Convert.ToInt32(item["OrderId"]) + 1;
                        }
                    }
                    SchSystem.Model.SchDepartInfo model = new SchSystem.Model.SchDepartInfo();
                    model.RecTime = DateTime.Now;
                    model.RecUser = Com.Session.userid;
                    model.SchId   = int.Parse(schid);

                    model.OrderId = OrderId;

                    if (pid.ToString() == "null")
                    {
                        model.Pid = Convert.ToInt32(0);
                    }
                    else
                    {
                        model.Pid = int.Parse(pid);
                    }
                    model.Stat        = int.Parse(stat);
                    model.DepartName  = Com.Public.SqlEncStr(dptname);
                    model.LastRecTime = DateTime.Now;
                    model.LastRecUser = Com.Session.userid;
                    int id = bll.Add(model);
                    ret = id.ToString();
                }
                catch (Exception ex)
                {
                    ret = ex.Message;
                }
            }
            return(ret);
        }