NPOI从数据库中导出数据到Excel

首先要添加NPOI.dll程序集 https://yunpan.cn/cMeSTELJSXmJJ  访问密码 8d83

把里面的程序集都添加到引用里

下面的代码是从数据库导出到Excel

   public void DaoChuExcel(string path)         {  //path是导出的excel要保存的路径
             using (Stream fs = new FileStream(path, FileMode.Create, FileAccess.Write))
             {  //创建一个表
                 XSSFWorkbook work = new XSSFWorkbook();
                //创建页
                 ISheet sheet = work.CreateSheet("zx");
                 List<MemberInfo> list = memDal.GetAllMemberByDelFlag();
                //创建行
                 for (int i = ; i < list.Count; i++)
                 {
                     IRow row = sheet.CreateRow(i); //定义excel中的一行

                       //下面的Icell代表行中的单元格
                     ICell cell2 = row.CreateCell(, CellType.String);
                     cell2.SetCellValue(list[i].MemName);

                     ICell cell3 = row.CreateCell(, CellType.String);
                     cell3.SetCellValue(list[i].MemMobilePhone);

                     ICell cell4 = row.CreateCell(, CellType.String);
                     cell4.SetCellValue(list[i].MemAddress);

                     ICell cell5 = row.CreateCell(, CellType.Numeric);
                     cell5.SetCellValue(list[i].MemType);

                     ICell cell6 = row.CreateCell(, CellType.String);
                     cell6.SetCellValue(list[i].MemNum);

                     ICell cell7 = row.CreateCell(, CellType.String);
                     cell7.SetCellValue(list[i].MemGender);

                     ICell cell8 = row.CreateCell(, CellType.Numeric);
                     cell8.SetCellValue(list[i].MemDiscount);

                     ICell cell9 = row.CreateCell(, CellType.Numeric);
                     cell9.SetCellValue(list[i].MemMoney);

                     ICell cell10 = row.CreateCell(, CellType.Numeric);
                     cell10.SetCellValue(list[i].DelFlag);

                     ICell cell11 = row.CreateCell(, CellType.String);
                     cell11.SetCellValue(list[i].SubTime.ToShortDateString());

                     ICell cell12 = row.CreateCell(, CellType.Numeric);
                     cell12.SetCellValue(list[i].MemIntegral);

                     ICell cell13 = row.CreateCell(, CellType.String);
                     cell13.SetCellValue(list[i].MemEndTime.ToShortDateString());

                     ICell cell14 = row.CreateCell(, CellType.String);
                     cell14.SetCellValue(list[i].MemBirthday.ToShortDateString());
                 }
                 work.Write(fs);  //最后把表写入IO流中

             }

         }

下面是从excel中导入数据库

  public void ReadExcel(string path)
         {
             using (Stream fs = new FileStream(path,FileMode.Open,FileAccess.Read))  //从指定路径读入excel表
             {
                 List<MemberInfo> list = new List<MemberInfo>();
             //工作表
                 IWorkbook workbook = WorkbookFactory.Create(fs);
                 //获取页
                 ISheet sheet = workbook.GetSheetAt();
                 //遍历行
                 for (int i = ; i <=sheet.LastRowNum; i++)
                 {
                     MemberInfo mem = new MemberInfo();
                    //获取行
                     IRow row = sheet.GetRow(i);

                     mem.MemName = row.GetCell().StringCellValue;
                     mem.MemMobilePhone = row.GetCell().StringCellValue;
                     mem.MemAddress = row.GetCell().StringCellValue;
                     mem.MemType = Convert.ToInt32(row.GetCell().NumericCellValue);
                     mem.MemNum = row.GetCell().StringCellValue;
                     mem.MemGender = row.GetCell().StringCellValue;
                     mem.MemDiscount = Convert.ToDouble(row.GetCell().NumericCellValue);
                     mem.MemMoney = row.GetCell().NumericCellValue;
                     mem.DelFlag = Convert.ToInt32(row.GetCell().NumericCellValue);

                     mem.SubTime =Convert.ToDateTime(row.GetCell().StringCellValue);
                     mem.MemIntegral = Convert.ToInt32(row.GetCell().NumericCellValue);
                     mem.MemEndTime = Convert.ToDateTime(row.GetCell().StringCellValue);
                     mem.MemBirthday = Convert.ToDateTime(row.GetCell().StringCellValue);
                     list.Add(mem);
                 }
                 memDal.AddMemberInfo(list);  //把数据体添加到数据库
             }

         }