Asp.net MVC 利用 Nopi 导出 Excel

/// <summary>
		/// 导出认账流水
		/// </summary>
		/// <returns></returns>
		public ActionResult ExportAdmitBankTrans(BankTransQueryModel queryModel)
		{
			HSSFWorkbook workBook = new HSSFWorkbook();
			ISheet sheet = workBook.CreateSheet("商务报表"); 
			IRow row = sheet.CreateRow(0);

			// 获取样式
			Func<ICellStyle> getCellStyle = () =>
			{
				ICellStyle cellStyle = workBook.CreateCellStyle();
				cellStyle.Alignment = HorizontalAlignment.Center;
				return cellStyle;
			};

			ICellStyle headerStyle = getCellStyle();
			IFont fontHeade = workBook.CreateFont();
			fontHeade.FontHeightInPoints = 11;
			fontHeade.FontName = "微软雅黑";
			fontHeade.Boldweight = (short)FontBoldWeight.Bold;
			headerStyle.SetFont(fontHeade);

			Func<string, int, ICell> setCellStyle = (string cellText, int colindex) =>
			{
				ICell cell = row.CreateCell(colindex);
				sheet.SetColumnWidth(colindex, 9000);
				cell.SetCellValue(cellText);
				cell.CellStyle = headerStyle;
				return cell;
			};
			setCellStyle("供应商名称", 0);
			setCellStyle("采购编号", 1);
			setCellStyle("实际到账", 2);
			setCellStyle("到账日期", 3);
			int rowStart = 1;

			var list = BankTransBll.Instance.GetAllBankTransRealList(queryModel);
			if (list != null)
			{
				foreach (var item in list)
				{
					IRow myrow = sheet.CreateRow(rowStart);
					myrow.CreateCell(0).SetCellValue(item.CompanyName);
					myrow.CreateCell(1).SetCellValue(item.ContractNo);
					myrow.CreateCell(2).SetCellValue(item.Amount.ToString("f2"));
					myrow.CreateCell(3).SetCellValue(item.REC_CREATETIME.ToShortDateString());

					rowStart++;
				}
			}

			using (MemoryStream ms = new MemoryStream())
			{
				workBook.Write(ms);
				byte[] buffers = ms.ToArray();

				return File(buffers, "application/vnd.ms-excel", string.Format("{0}.xls", DateTime.Now.ToString("yyyyMMddHHmmss")));

			}
		}