NOPI导出Excel

            DataTable dt = GetMonthQsEditData(mainId);//数据  
            using (FileStream file = new FileStream(HttpContext.Current.Server.MapPath("/Files/Templetes/月清算模板.xls"), FileMode.Open, FileAccess.Read))
            {
                HSSFWorkbook hssfworkbook = new HSSFWorkbook(file);
                ISheet sheet = hssfworkbook.GetSheetAt(0);
                int startRow = 2;//开始行
                int count = 0;
                List<int> merg = new List<int>();
                string unitId = "";
                IRow row = null;
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    if (i == 0)
                    {
                        row = sheet.GetRow(startRow);
                    }
                    else
                    {
                        row = CopyRow(hssfworkbook, sheet, startRow, startRow + i,false);
                    }

                    if (unitId != dt.Rows[i]["UNITID"].ToString())
                    {
                        if (count != 0)
                        {
                            merg.Add(count);
                        }
                        count = 0;
                        row.GetCell(0).SetCellValue(dt.Rows[i]["UNITNAME"].ToString());
                        row.GetCell(1).SetCellValue(dt.Rows[i]["SFNAME"].ToString());
                        row.GetCell(2).SetCellValue(dt.Rows[i]["SFID"].ToString());
                        row.GetCell(3).SetCellValue(string.Format("{0:0.0}", dt.Rows[i]["YEARTOTAL"]));
                        row.GetCell(4).SetCellValue(string.Format("{0:0.0}", dt.Rows[i]["MONTHPROPORTION"]));
                        row.GetCell(5).SetCellFormula("D" + (3 + i) + "*E" + (3 + i) + "/100");
                        row.GetCell(6).SetCellValue(string.Format("{0:0.0}", dt.Rows[i]["ACTUAL"]));
                        unitId = dt.Rows[i]["UNITID"].ToString();
                    }
                    else
                    {
                        row.GetCell(0).SetCellValue(dt.Rows[i]["UNITNAME"].ToString());
                        row.GetCell(1).SetCellValue(dt.Rows[i]["SFNAME"].ToString());
                        row.GetCell(2).SetCellValue(dt.Rows[i]["SFID"].ToString());
                        row.GetCell(3).SetCellValue(string.Format("{0:0.0}", dt.Rows[i]["YEARTOTAL"]));
                        row.GetCell(4).SetCellValue(string.Format("{0:0.0}", dt.Rows[i]["MONTHPROPORTION"]));
                        row.GetCell(5).SetCellFormula("D" + (3 + i) + "*E" + (3 + i) + "/100");
                        row.GetCell(6).SetCellValue(string.Format("{0:0.0}", dt.Rows[i]["ACTUAL"]));
                    }
                    count++;
                }
                int rowNum = 2;
                foreach (int v in merg)
                {
                    CellRangeAddress cellRangeAddress = new CellRangeAddress(rowNum, rowNum + v - 1, 0, 0);
                    sheet.AddMergedRegion(cellRangeAddress);
                    rowNum = rowNum + v;
                }
                MemoryStream ms = new MemoryStream();
                hssfworkbook.Write(ms);
                HttpContext curContext = HttpContext.Current;
                curContext.Response.ContentType = "application/vnd.ms-excel";
                curContext.Response.ContentEncoding = Encoding.UTF8;
                curContext.Response.Charset = "";
                curContext.Response.AddHeader("Content-Disposition", string.Format("attachment; filename={0}.xls", HttpUtility.UrlEncode(pjName + DateTime.Now.ToString("yyyy-MM-dd"), System.Text.Encoding.UTF8)));
                curContext.Response.BinaryWrite(ms.ToArray());
                // curContext.Response.End();
                curContext.ApplicationInstance.CompleteRequest();
                hssfworkbook = null;
                ms.Close();
                ms.Dispose();
            }