public FileResult ExcelNewKeyPromotion()

        {

            string title = "Market Sensing-Key Promotion";

            var model = GetList();

            NPOI.HSSF.UserModel.HSSFWorkbook book = new NPOI.HSSF.UserModel.HSSFWorkbook();

            NPOI.SS.UserModel.ISheet sheet1 = book.CreateSheet("Sheet1");

            IFont font = book.CreateFont();

            font.FontHeightInPoints = ;

            font.Boldweight = (short)NPOI.SS.UserModel.FontBoldWeight.Bold;//加粗

            IFont font1 = book.CreateFont();

            font1.FontHeightInPoints = ;

            font1.Boldweight = (short)NPOI.SS.UserModel.FontBoldWeight.Bold;//加粗

            NPOI.SS.UserModel.IRow row0 = sheet1.CreateRow();

            SetCellRangeAddress(sheet1, , , , ); //设置夸单元格

            ICellStyle cellstyle = book.CreateCellStyle();//设置垂直居中格式

            cellstyle.Alignment = HorizontalAlignment.Center; //设置水平居中

            cellstyle.VerticalAlignment = VerticalAlignment.Center;//垂直居中

            cellstyle.SetFont(font); //设置字体

            ICell cell = row0.CreateCell();

            cell.CellStyle = cellstyle;

            cell.SetCellValue(title);

            NPOI.SS.UserModel.IRow row1 = sheet1.CreateRow();

            ICellStyle Rowstyle = book.CreateCellStyle();//设置垂直居中格式

            Rowstyle.VerticalAlignment = VerticalAlignment.Center;//垂直居中

            Rowstyle.Alignment = HorizontalAlignment.Center; //设置水平居中

            Rowstyle.FillPattern = FillPattern.SolidForeground;

            Rowstyle.FillForegroundColor = NPOI.HSSF.Util.HSSFColor.Grey25Percent.Index; //设置背景色

            Rowstyle.SetFont(font1);

            var lstTitle = new List<string> { "Year", "Week", "Date"};

            for (int i = ; i < lstTitle.Count(); i++)

            {

                ICell cellRow1 = row1.CreateCell(i);

                cellRow1.CellStyle = Rowstyle;

                cellRow1.SetCellValue(lstTitle[i]);

            }

            // row1.CreateCell(12).SetCellValue("Photo");

            ICell cellRow2 = row1.CreateCell();

            cellRow2.CellStyle = Rowstyle;

            cellRow2.SetCellValue("Photo");

            Rowstyle.SetFont(font1);

            SetCellRangeAddress(sheet1, , , , ); //设置夸单元格

            int rowIndex = ;

            for (int i = ; i < model.Count; i++)

            {

                NPOI.SS.UserModel.IRow rowtemp = sheet1.CreateRow(i + );

                rowtemp.Height = ; //设置行高              

                rowtemp.CreateCell().SetCellValue(model[i].Id.ToString());

                rowtemp.CreateCell().SetCellValue(model[i].Name.ToString());

                rowtemp.CreateCell().SetCellValue(model[i].CreateTime.ToString("yyyy-MM-dd hh:mm:ss"));

                rowIndex++;

            }

            System.IO.MemoryStream ms = new System.IO.MemoryStream();

            book.Write(ms);

            ms.Seek(, SeekOrigin.Begin);

            string fileName = "Market Sensing / KeyPromotion.xls";

            return File(ms, "application/vnd.ms-excel", fileName);

        }