/*使用示例：
         * DataSet ds=(DataSet)Session["AdBrowseHitDayList"];//本ds中有多个Dt
            string ExcelFolder=Assistant.GetConfigString("ExcelFolder");
            string FilePath=Server.MapPath(".")+"\\"+ExcelFolder+"\\";
            
            //生成列的中文对应表
            Hashtable nameList = new Hashtable();
            nameList.Add("ADID", "广告编码");
            nameList.Add("ADName", "广告名称");
            nameList.Add("year", "年");
            nameList.Add("month", "月");
            nameList.Add("browsum", "显示数");
            nameList.Add("hitsum", "点击数");
            nameList.Add("BrowsinglIP", "独立IP显示");
            nameList.Add("HitsinglIP", "独立IP点击");
            //利用excel对象
            DataToExcel dte=new DataToExcel();
            string filename="";
            try
            {            
                if(ds.Tables[0].Rows.Count>0)
                {
                    filename=dte.DataExcel(ds.Tables[0],"标题",FilePath,nameList);
                }
            }
            catch
            {
                //dte.KillExcelProcess();
            }
            
            if(filename!="")
            {
                Response.Redirect(ExcelFolder+"\\"+filename,true);
            }
         * 
         * */



   public string DataExcel(System.Data.DataTable dt, string strTitle, string FilePath, Hashtable nameList)
        {
            COM.Excel.cExcelFile excel = new COM.Excel.cExcelFile();
            ClearFile(FilePath);
            string filename = DateTime.Now.ToString("yyyyMMddHHmmssff") + ".xls";
            excel.CreateFile(FilePath + filename);
            excel.PrintGridLines = false;

            COM.Excel.cExcelFile.MarginTypes mt1 = COM.Excel.cExcelFile.MarginTypes.xlsTopMargin;
            COM.Excel.cExcelFile.MarginTypes mt2 = COM.Excel.cExcelFile.MarginTypes.xlsLeftMargin;
            COM.Excel.cExcelFile.MarginTypes mt3 = COM.Excel.cExcelFile.MarginTypes.xlsRightMargin;
            COM.Excel.cExcelFile.MarginTypes mt4 = COM.Excel.cExcelFile.MarginTypes.xlsBottomMargin;

            double height = 1.5;
            excel.SetMargin(ref mt1, ref height);
            excel.SetMargin(ref mt2, ref height);
            excel.SetMargin(ref mt3, ref height);
            excel.SetMargin(ref mt4, ref height);

            COM.Excel.cExcelFile.FontFormatting ff = COM.Excel.cExcelFile.FontFormatting.xlsNoFormat;
            string font = "宋体";
            short fontsize = 9;
            excel.SetFont(ref font, ref fontsize, ref ff);

            byte b1 = 1,
                b2 = 12;
            short s3 = 12;
            excel.SetColumnWidth(ref b1, ref b2, ref s3);

            string header = "页眉";
            string footer = "页脚";
            excel.SetHeader(ref header);
            excel.SetFooter(ref footer);


            COM.Excel.cExcelFile.ValueTypes vt = COM.Excel.cExcelFile.ValueTypes.xlsText;
            COM.Excel.cExcelFile.CellFont cf = COM.Excel.cExcelFile.CellFont.xlsFont0;
            COM.Excel.cExcelFile.CellAlignment ca = COM.Excel.cExcelFile.CellAlignment.xlsCentreAlign;
            COM.Excel.cExcelFile.CellHiddenLocked chl = COM.Excel.cExcelFile.CellHiddenLocked.xlsNormal;

            // 报表标题
            int cellformat = 1;
            //            int rowindex = 1,colindex = 3;                    
            //            object title = (object)strTitle;
            //            excel.WriteValue(ref vt, ref cf, ref ca, ref chl,ref rowindex,ref colindex,re