list 排序 不规则model字段排序

            for (int i = 0; i < list.Count; i++)
            {
                foreach (JhoutpatCpNodeVsParent l in list)
                {
                    if (list[i].ParentId == "" || list[i].ParentId == null)
                    {
                        list[i].ParentId = "0";
                        newlist.Add(list[i]);
                        break;
                    }
                    if (i > 0)
                    {
                        string a = (i - 1).ToString();
                        JhoutpatCpNodeVsParent model = newlist.Where(q => q.ParentId == a).FirstOrDefault();
                        if (model == null)
                        {
                            break;
                        }
                        var s = list.Where(x => x.ParentId == model.NodeId).FirstOrDefault();
                        if (s != null)
                        {
                            s.ParentId = i.ToString();
                            newlist.Add(s);
                            break;
                        }
                    }
                }
                DataRow[] ret = patientNodeIds.Select("NODEID='" + newlist[i].NodeId + "'");

            }