使用NPOI将数据库里信息导出Excel表格并提示用户下载

 1         //mvc项目可以传多个id以逗号相隔的字符串
 2         public ActionResult execl(string ids)
 3         {
 4             List<PayLog> list = new List<PayLog>();
 5             string[] idsstring = ids.Split(new char[] { ‘,‘ }, StringSplitOptions.RemoveEmptyEntries);//拆字符串
 6             for (int j = 0; j < idsstring.Length; j++)
 7             {
 8                 string str = idsstring[j];
 9                 list.Add(DbSession.PayLogRepository.Fetch(x => x.FInvoiceId == str));//链接数据库读取数据对象
10             }
11             HSSFWorkbook work = new HSSFWorkbook();//创建页
12             HSSFSheet sheet = work.CreateSheet();//创建列
13             HSSFRow row = sheet.CreateRow(0);//第一行
14             row.CreateCell(0, HSSFCell.CELL_TYPE_STRING).SetCellValue("流水号");
15             row.CreateCell(1, HSSFCell.CELL_TYPE_STRING).SetCellValue("编码");
16             //循环对象集合创建数据列
17             for (int i = 0; i < list.Count; i++)
18             {
19                 HSSFRow rows = sheet.CreateRow(i + 1);
20                 rows.CreateCell(0, HSSFCell.CELL_TYPE_STRING).SetCellValue(list[i].FPayInNo);
21                 rows.CreateCell(1, HSSFCell.CELL_TYPE_STRING).SetCellValue(list[i].FEnterpriseId);
22             }
23             string path = @"F:\信息.xls";//项目中应改为相对路径而不是绝对路径
24             using (FileStream file = new FileStream(path, FileMode.Create))
25             {
26                 work.Write(file);
27             }
28             return File(new FileStream(path, FileMode.Open), "application/ms-excel", "信息.xls");