C# NPOI导入Excel C#使用NPOI导入Excel的方法详解

using System.IO;
using System.Reflection;
using NPOI.HSSF.UserModel;
using NPOI.SS.UserModel;
using System.Web;

string path = "~/上传文件/custompersonsalary/" + id + "/"+id+".xls";
string filePath = Server.MapPath(path);
FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite) //打开.xls文件

HSSFWorkbook wk = new HSSFWorkbook(fs); //把xls文件中的数据写入wk中

for (int i = 0; i < wk.NumberOfSheets; i++) //NumberOfSheets是xls文件中总共的表数

ISheet sheet = wk.GetSheetAt(i); //读取当前表数据

for (j = 1; j <= sheet.LastRowNum; j++) //LastRowNum 是当前表的总行数
{
  IRow row = sheet.GetRow(j); //读取当前行数据

row.Cells[2].ToString();

row.Cells[2].NumericCellValue

/// <summary>
/// 导入操作
/// </summary>
/// @author: 刘放
/// @date: 2015/10/17
/// <param name="id">主表id</param>
/// <returns>如果成功，返回ok，如果失败，返回不满足格式的姓名</returns>
public string InDB(string id)
{
 int j=0;
 StringBuilder sbr = new StringBuilder();
 string path = "~/上传文件/custompersonsalary/" + id + "/"+id+".xls";
 string filePath = Server.MapPath(path);
 using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite)) //打开123.xls文件
 {
  //定义一个工资详细集合
  List<HR_StaffWage_Details> staffWageList = new List<HR_StaffWage_Details>();
  try
  {
   HSSFWorkbook wk = new HSSFWorkbook(fs); //把xls文件中的数据写入wk中
   for (int i = 0; i < wk.NumberOfSheets; i++) //NumberOfSheets是xls文件中总共的表数
   {
    ISheet sheet = wk.GetSheetAt(i); //读取当前表数据
    for (j = 1; j <= sheet.LastRowNum; j++) //LastRowNum 是当前表的总行数
    {
     IRow row = sheet.GetRow(j); //读取当前行数据
     if (row != null)
     {
      //for (int k = 0; k <= row.LastCellNum; k++) //LastCellNum 是当前行的总列数
      //{
      //如果某一行的员工姓名，部门，岗位和员工信息表不对应，退出。
      SysEntities db = new SysEntities();
      if (CommonHelp.IsInHR_StaffInfo(db, row.Cells[2].ToString(), row.Cells[0].ToString(), row.Cells[1].ToString()) == false)//姓名，部门，岗位
      {
       //返回名字以便提示
       return row.Cells[2].ToString();
      }
      //如果符合要求，这将值放入集合中。
      HR_StaffWage_Details hr_sw = new HR_StaffWage_Details();
      hr_sw.Id = Result.GetNewIdForNum("HR_StaffWage_Details");//生成编号
      hr_sw.SW_D_Name = row.Cells[2].ToString();//姓名
      hr_sw.SW_D_Department = row.Cells[0].ToString();//部门
      hr_sw.SW_D_Position = row.Cells[1].ToString();//职位
      hr_sw.SW_D_ManHour = row.Cells[3].ToString() != "" ? Convert.ToDouble(row.Cells[3].ToString()) : 0;//工数
      hr_sw.SW_D_PostWage = row.Cells[4].NumericCellValue.ToString() != "" ? Convert.ToDouble(row.Cells[4].NumericCellValue.ToString()) : 0;//基本工资
      hr_sw.SW_D_RealPostWage = row.Cells[5].NumericCellValue.ToString() != "" ? Convert.ToDouble(row.Cells[5].NumericCellValue.ToString()) : 0;//岗位工资
      hr_sw.SW_D_PieceWage = row.Cells[6].NumericCellValue.ToString() != "" ? Convert.ToDouble(row.Cells[6].NumericCellValue.ToString()) : 0;//计件工资
      hr_sw.SW_D_OvertimePay = row.Cells[7].NumericCellValue.ToString() != "" ? Convert.ToDouble(row.Cells[7].NumericCellValue.ToString()) : 0;//加班工资
      hr_sw.SW_D_YearWage = row.Cells[8].NumericCellValue.ToString() != "" ? Convert.ToDouble(row.Cells[8].NumericCellValue.ToString()) : 0;//年假工资
      hr_sw.SW_D_MiddleShift = row.Cells[9].NumericCellValue.ToString() != "" ? Convert.ToDouble(row.Cells[9].NumericCellValue.ToString()) : 0;//中班
      hr_sw.SW_D_NightShift = row.Cells[10].NumericCellValue.ToString() != "" ? Convert.ToDouble(row.Cells[10].NumericCellValue.ToString()) : 0;//夜班
      hr_sw.SW_D_MedicalAid = row.Cells[11].NumericCellValue.ToString() != "" ? Convert.ToDouble(row.Cells[11].NumericCellValue.ToString()) : 0;//医补
      hr_sw.SW_D_DustFee = row.Cells[12].NumericCellValue.ToString() != "" ? Convert.ToDouble(row.Cells[12].NumericCellValue.ToString()) : 0;//防尘费
      hr_sw.SW_D_Other = row.Cells[13].NumericCellValue.ToString() != "" ? Convert.ToDouble(row.Cells[13].NumericCellValue.ToString()) : 0;//其他
      hr_sw.SW_D_Allowance = row.Cells[14].NumericCellValue.ToString() != "" ? Convert.ToDouble(row.Cells[14].NumericCellValue.ToString()) : 0;//津贴
      hr_sw.SW_D_Heat = row.Cells[15].NumericCellValue.ToString() != "" ? Convert.ToDouble(row.Cells[15].NumericCellValue.ToString()) : 0;//防暑费
      hr_sw.SW_D_Wash = row.Cells[16].NumericCellValue.ToString() != "" ? Convert.ToDouble(row.Cells[16].NumericCellValue.ToString()) : 0;//澡费
      hr_sw.SW_D_Subsidy = row.Cells[17].NumericCellValue.ToString() != "" ? Convert.ToDouble(row.Cells[17].NumericCellValue.ToString()) : 0;//补助
      hr_sw.SW_D_Bonus = row.Cells[18].NumericCellValue.ToString() != "" ? Convert.ToDouble(row.Cells[18].NumericCellValue.ToString()) : 0;//奖金
      hr_sw.SW_D_Fine = row.Cells[19].NumericCellValue.ToString() != "" ? Convert.ToDouble(row.Cells[19].NumericCellValue.ToString()) : 0;//罚款
      hr_sw.SW_D_Insurance = row.Cells[20].NumericCellValue.ToString() != "" ? Convert.ToDouble(row.Cells[20].NumericCellValue.ToString()) : 0;//养老保险
      hr_sw.SW_D_MedicalInsurance = row.Cells[21].NumericCellValue.ToString() != "" ? Convert.ToDouble(row.Cells[21].NumericCellValue.ToString()) : 0;//医疗保险
      hr_sw.SW_D_Lunch = row.Cells[22].NumericCellValue.ToString() != "" ? Convert.ToDouble(row.Cells[22].NumericCellValue.ToString()) : 0;//餐费
      hr_sw.SW_D_DeLunch = row.Cells[23].NumericCellValue.ToString() != "" ? Convert.ToDouble(row.Cells[23].NumericCellValue.ToString()) : 0;//扣餐费
      hr_sw.SW_D_De = row.Cells[24].NumericCellValue.ToString() != "" ? Convert.ToDouble(row.Cells[24].NumericCellValue.ToString()) : 0;//扣项
      hr_sw.SW_D_Week = row.Cells[25].NumericCellValue.ToString() != "" ? Convert.ToDouble(row.Cells[25].NumericCellValue.ToString()) : 0;//星期
      hr_sw.SW_D_Duplex = row.Cells[26].NumericCellValue.ToString() != "" ? Convert.ToDouble(row.Cells[26].NumericCellValue.ToString()) : 0;//双工
      hr_sw.SW_D_ShouldWage = row.Cells[27].NumericCellValue.ToString() != "" ? Convert.ToDouble(row.Cells[27].NumericCellValue.ToString()) : 0;//应发金额
      hr_sw.SW_D_IncomeTax = row.Cells[28].NumericCellValue.ToString() != "" ? Convert.ToDouble(row.Cells[28].NumericCellValue.ToString()) : 0;//所得税
      hr_sw.SW_D_FinalWage = row.Cells[29].NumericCellValue.ToString() != "" ? Convert.ToDouble(row.Cells[29].NumericCellValue.ToString()) : 0;//实发金额
      hr_sw.SW_D_Remark = row.Cells[30].ToString();//备注
      hr_sw.SW_Id = id;//外键
      hr_sw.SW_D_WageType = null;//工资类型
      staffWageList.Add(hr_sw);
     }
    }
   }
  }
  catch (Exception e) {
   //错误定位
   int k = j;
  }
  //再将list转入数据库
  double allFinalWage = 0;
  foreach (HR_StaffWage_Details item in staffWageList)
  {
   SysEntities db = new SysEntities();
   db.AddToHR_StaffWage_Details(item);
   db.SaveChanges();
   allFinalWage +=Convert.ToDouble(item.SW_D_FinalWage);
  }
  //将总计赋予主表
  SysEntities dbt = new SysEntities();
  HR_StaffWage sw = CommonHelp.GetHR_StaffWageById(dbt, id);
  sw.SW_WageSum = Math.Round(allFinalWage,2);
  dbt.SaveChanges();
 }
 sbr.ToString();
  return "OK";
}