遍历输出嵌套报表

public class OTTimeReportListBuilder
    ...{
        ReportArg _reportArg = null;
        
        public OTTimeReportListBuilder(ReportArg reportArg)
        ...{
            _reportArg = reportArg;
            Query();
        }

        private void Query()
        ...{
            Planing.OTTimeReport report = new Achievo.PMS.Planing.OTTimeReport();
            this._items = report.GetItems(this._reportArg);
        }

        /**//// <summary>
        /// user name(lower case)/user id
        /// </summary>
        /// <param name="filterList"></param>
        public void Filter(SortedList listForFilter)
        ...{
            ArrayList filteredList = new ArrayList();
            if(this._items!=null)
            ...{
                foreach(Planing.OTTimeReportItem tempItem in this._items)
                ...{
                    string key = tempItem.EngineerName.ToLower();
                    if(listForFilter.Contains(key))
                        filteredList.Add(tempItem);
                }
                this._items = (Planing.OTTimeReportItem[])filteredList.ToArray(typeof(Planing.OTTimeReportItem));
                if(this._items.Length==0)
                    this._items=null;
            }
        }

        public bool HasRecords
        ...{
            get...{return (this._items!=null && this._items.Length>0);}
        }

        Planing.OTTimeReportItem[] _items = null;
        public Planing.OTTimeReportItem[] GetDetailItems()
        ...{
            return _items;
        }

        public string GetMonthLyReportString()
        ...{
            if(this._items==null || this._items.Length==0)
                return "";
            //
            StringBuilder resultBuilder = new StringBuilder();
            NestedList linkList = new NestedList();
            foreach(Planing.OTTimeReportItem tempItem in this._items)
            ...{
                string[] names = new string[]...{tempItem.ProductName
                                                 ,tempItem.ProjectName
                                                 ,tempItem.WeekEnd.ToString("MM/dd/yyyy")
                                                 ,tempItem.EngineerName
                                                 };
                linkList.AddOrUpdate(names ,tempItem.OTHours);
            }
            string htmlString = linkList.ToHTMLString();
            return htmlString;
        }

        class NestedList : SortedList
        ...{
            property#region property
            private float _sum = 0;
            public float Sum
            ...{
                get...{return _sum;}
                set...{_sum=value;}
            }

            private int _level = 1;
            /**//// <summary>
            /// from 1 to end
            /// </summary>
            public int Level
            ...{
                get...{return _level;}
                set...{_level=value;}
            }

            private int _levelCount = 1;
            /**//// <summary>
            /// level number, including itself
            /// </summary>
            public int LevelCount
            ...{
                get...{return _levelCount;}
                set...{_levelCount=value;}
            }

            private int _rowSpan = 0;
            public int RowSpan
            ...{
                get...{return _rowSpan;}
                set...{_rowSpan=value;}
            }

            private int _colSpan = 1;
            public int ColSpan
            ...{
                get...{return _colSpan;}
                set...{_colSpan=value;}
            }

            private bool _isLastList = false;
            public bool IsLastList
            ...{
                get...{return _isLastList;}
                set...{_isLastList=value;}
            }

            private NestedList _parent = null;
            public NestedList Parent
            ...{
                get...{return _parent;}
                set...{_parent=value;}
            }
            #endregion

            public bool AddOrUpdate(string[] keys ,float value)
            ...{
                if(keys==null || keys.Length==0)
                    return false;
                NestedList actionList = this;
                for(int i=0;i<keys.Length;i++)
                ...{
                    actionList.Sum += value;
                    actionList.Level  = i+1;
                    actionList.LevelCount  = keys.Length-i;
                    actionList.ColSpan = keys.Length-i+1;
                    actionList.IsLastList = (i==(keys.Length-1));
                    string key = keys[i];
                    if(actionList.Contains(key))
                    ...{
                        if(actionList[key] is NestedList)
                            actionList = (NestedList)actionList[key];
                        else
                            actionList[key] = float.Parse(actionList[key].ToString()) + value;
                    }
                    else
                    ...{
                        NestedList addingList = new NestedList();
                        if(actionList.IsLastList)
                            actionList.Add(key ,value);
                        else
                            actionList.Add(key ,addingList);
                        addingList.Parent = actionList;
                        actionList = addingList;
                        UpdateStatistics(addingList);
                    }
                }
                return true;
            }

            private void UpdateStatistics(NestedList actionList)
            ...{
                NestedList parent = actionList.Parent;
                while(parent!=null)
                ...{
                    parent.RowSpan++;
                    parent = parent.Parent;
                }
            }

            public string ToHTMLString()
            ...{
                StringBuilder htmlBuilder = new StringBuilder();
                bool isFirstNode = true;
                for(int i=0;i<this.Keys.Count;i++)
                ...{
                    isFirstNode = (i==0);
                    string key = this.GetKey(i).ToString();
                    NestedList tempList = this[key] as NestedList;
                    if(tempList==null)
                    ...{
                        float tempValue = float.Parse(this[key].ToString());
                        if(isFirstNode)
                            htmlBuilder.Append(string.Format("<td>{0}</td><td>{1}</td></tr> " ,key ,tempValue));
                        else
                            htmlBuilder.Append(string.Format("<tr class="DataGridItemStyleForList"><td>{0}</td><td>{1}</td></tr> " ,key ,tempValue));
                    }
                    else
                    ...{
                        string showName = key.Trim()=="" ? "(No Name)" : key;
                        string rowLeftPart = ((!isFirstNode || this.Level==1)) ? "<tr class="DataGridItemStyleForList">" : "";
                        string rowMiddlePart = string.Format(@"<td rowSpan=""{0}"">{1}</td>" ,tempList.RowSpan ,showName);
                        string rowRightPart = tempList.ToHTMLString();
                        string rowTemplate = @"<tr class=""DataGridItemStyleForList""><td colSpan=""{0}"">{1} {2}</td><td>{3}</td></tr>" + " ";
                        string rowTotal = string.Format(rowTemplate ,tempList.ColSpan ,showName ,Global.UserLan.GetItem("OTTimeReport_searchCondition_list_header_SubTotal") ,tempList.Sum);
                        htmlBuilder.Append(rowLeftPart + rowMiddlePart + rowRightPart + rowTotal);
                    }
                }
                if(this.Level==1 && this.Keys.Count>1)
                ...{
                    string rowTemplate = @"<tr class=""DataGridItemStyleForList""><td colSpan=""{0}"">{1}</td><td>{2}</td></tr>" + " ";
                    string rowTotal = string.Format(rowTemplate ,this.ColSpan-1 ,Global.UserLan.GetItem("OTTimeReport_searchCondition_list_header_Total") ,this.Sum);
                    htmlBuilder.Append(rowTotal);
                }
                string returnString = htmlBuilder.ToString();
                return returnString;
            }
        }
    }