public FileResult ToExcel()

{//数据源

var source =ProductsService.List();//保存路径

string prirkdFilePath = HttpContext.Server.MapPath("~/DownLoad") + "\\" + DateTime.Now.ToString("yyyyMM") + "\\";if (!Directory.Exists(prirkdFilePath))

Directory.CreateDirectory(prirkdFilePath);//文件名称

string fileNameNoExtension = "产品列表(" + DateTime.Now.ToString("yyyyMMddHHmmssfff") + ")";string fileName = fileNameNoExtension + ".xlsx";//模板路径

string priModel = Server.MapPath(@"~/DownLoad\ExcelTemp\产品列表.xlsx");//生成模板读取IO流

FileStream fileStreamRead = newFileStream(priModel, FileMode.Open, FileAccess.Read);//创建工作簿对象

XSSFWorkbook workBook = newXSSFWorkbook(fileStreamRead);//预设单元格样式

XSSFCellStyle comStyle =(XSSFCellStyle)workBook.CreateCellStyle();

comStyle.Alignment= HorizontalAlignment.Center;//垂直居中

XSSFCellStyle dateStyle=(XSSFCellStyle)workBook.CreateCellStyle();

dateStyle.Alignment= HorizontalAlignment.Center;//垂直居中

XSSFDataFormat format =(XSSFDataFormat)workBook.CreateDataFormat();

dateStyle.DataFormat= format.GetFormat("yyyy-mm-dd HH:mm:ss");//日期样式

XSSFCellStyle decimalStyle=(XSSFCellStyle)workBook.CreateCellStyle();

decimalStyle.Alignment=HorizontalAlignment.Center;

XSSFDataFormat format2=(XSSFDataFormat)workBook.CreateDataFormat();

decimalStyle.DataFormat= format2.GetFormat("0.00");//获取工作表

XSSFSheet xssfSheet = workBook.GetSheetAt(0) asXSSFSheet;int rowIndex = 1;//填充数据

foreach (V_Product row insource)

{//创建行

XSSFRow xssfRow = xssfSheet.CreateRow(rowIndex) asXSSFRow;

xssfRow.CreateCell(0).SetCellValue(row.ProductNumber);

xssfRow.Cells[0].CellStyle =comStyle;

xssfRow.CreateCell(1).SetCellValue(row.ProductName);

xssfRow.Cells[1].CellStyle =comStyle;

xssfRow.CreateCell(2);

xssfRow.CreateCell(3).SetCellValue(row.ProductStandard);

xssfRow.Cells[3].CellStyle =comStyle;

xssfRow.CreateCell(4).SetCellValue(Convert.ToDouble(row.Price));

xssfRow.Cells[4].CellStyle =decimalStyle;

xssfRow.CreateCell(5).SetCellValue(Convert.ToDouble(row.OrderId));

xssfRow.Cells[5].CellStyle =comStyle;

xssfRow.CreateCell(6).SetCellValue(row.CategoryName);

xssfRow.Cells[6].CellStyle =comStyle;

xssfRow.CreateCell(7).SetCellValue(row.Creator);

xssfRow.Cells[7].CellStyle =comStyle;

xssfRow.CreateCell(8).SetCellValue(Convert.ToDateTime(row.Createtime));

xssfRow.Cells[8].CellStyle =dateStyle;//第二列添加图片

if (!string.IsNullOrEmpty(row.ProductImg))

{byte[] picBytes =getImageByte(row.ProductImg);int pictureIdx = workBook.AddPicture(picBytes, NPOI.SS.UserModel.PictureType.JPEG); //添加图片

XSSFDrawing patriarch=(XSSFDrawing)xssfSheet.CreateDrawingPatriarch();

XSSFClientAnchor anchor= new XSSFClientAnchor(0, 0, 100, 50, 2, rowIndex, 2 + 1, rowIndex + 1);//图片位置，图片左上角为(col, row)

XSSFPicture pict =(XSSFPicture)patriarch.CreatePicture(anchor, pictureIdx);//pict.Resize();//用图片原始大小来显示

}

}//合并路径

prirkdFilePath =Path.Combine(prirkdFilePath, fileName);//转化为流保存

FileStream files = newFileStream(prirkdFilePath, FileMode.Create);

workBook.Write(files);

files.Close();

files.Dispose();

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

}