C#最大值

  dtToSList = sqlAccess.ExecuteTable(CommandText);
  
   ToSNo = Convert.ToString(dtToSList.Rows[i].ItemArray[1]);
   
      if (Convert.ToInt32(sqlAccess.ExecuteScalar(CommandText)) > 0)
            {
                string LastToSID;
                CommandText = "SELECT ToSNo FROM OverSystems_ToSInfo where ToSNo like '" + NewToSID + "%' order by ToSNo desc";
                LastToSID = Convert.ToString(sqlAccess.ExecuteScalar(CommandText)).Substring(4);
                if (LastToSID.IndexOf("-") >= 0)
                    LastToSID = LastToSID.Substring(0, LastToSID.IndexOf("-"));
                NewToSID += (Convert.ToInt32(LastToSID) + 1).ToString("000");
            }
			
			
			//所选合同中都没有子项。因此注释寻找最大值代码。
                //dtPom = pc.GetPoMaster(" where ToSNO like '" + Ponum + "%' order by PoID desc ");
                int max = 0;
                //for (int v = 0; v < dtPom.Rows.Count; v++)
                //{
                //    //编号'-'后的最大值
                //    int[] num = new int[1000];
                //    for (int c = 0; c < dtPom.Rows.Count; c++)
                //    {
                //        string Pono = Convert.ToString(dtPom.Rows[c]["ToSNO"]);
                //        if (Pono.Contains("-"))
                //        {
                //            string pn = Pono.Split('-')[1];
                //            num[c] = Convert.ToInt32(pn);
                //        }
                //    }
                //     max = num.Max();
                //}