NPOI 数据导入导出

{
//数据导入
            OpenFileDialog open = new OpenFileDialog();
            open.Filter = "Excle文件|*.xls";
            open.Title="导入数据....";

            if (open.ShowDialog() != true)
            {
                return;
            }
            else
            {
                string filename = open.FileName;
                using (Stream stream = File.OpenRead(filename))
                {
                    HSSFWorkbook booke = new HSSFWorkbook(stream);
                    ISheet sheet = booke.GetSheetAt();
                    DataTable table = new DataTable();
                    table.Columns.Add("Name");
                    table.Columns.Add("Age");
                    table.Columns.Add("Indate");
                  //  DataRow row = new DataRow();
                    //  row["Name"]=

                    for(int i=;i< sheet.LastRowNum;i++)
                    {
                        IRow HssRow=sheet.GetRow(i);
                        DataRow row = table.NewRow();
                       row["Name"] = HssRow.GetCell().StringCellValue;
                        if (HssRow.GetCell().CellType == CellType.NUMERIC)
                        {
                            row["Age"] = HssRow.GetCell().NumericCellValue;
                        }

                        else if (HssRow.GetCell().CellType == CellType.STRING)
                        {
                            row["Age"] = Convert.ToInt32(HssRow.GetCell().NumericCellValue);
                        }
                        else
                        {
                            MessageBox.Show("数据类型出错");
                            return;
                       }
                        if (HssRow.GetCell().CellType == CellType.NUMERIC)
                        {
                        row["Indate"] =(DateTime) HssRow.GetCell().DateCellValue;}
                        table.Rows.Add(row);
                 }
                    TODB(table);
                }

            }
        }

        public void TODB(DataTable table)
        {
            using (SqlBulkCopy copy = new SqlBulkCopy("Password=HRMSys;Persist Security Info=True;User ID=HRMSys;Initial Catalog=HRMSys;Data Source=."))
            {
                copy.DestinationTableName = "T_Tex";
                copy.ColumnMappings.Add("Name","Name");
                copy.ColumnMappings.Add("Age", "Age");
                copy.ColumnMappings.Add("Indate", "Indate");
                if (table == null)
                {
                    MessageBox.Show("Table 参数为空", "错误提示" );
              return;
                }
                copy.WriteToServer(table);
                MessageBox.Show("数据导入成功","消息提示框");
                refashush();
            }
        }

//数据导出

          SaveFileDialog save = new SaveFileDialog();
            save.Filter="Excle文件|*.xls";
            save.Title="保存文件....";

            if (save.ShowDialog()!=true)
            {
                return;

            }
            else
            {
                List<TexMode> mo = this.listView.ItemsSource as List<TexMode>;
                TexMode [] mode= mo.ToArray();
                if(mode==null)
                {
                    MessageBox.Show("TexMode mode 数据为空");
                    return;
                }
               string fileName =save.FileName;
              HSSFWorkbook workbook = new HSSFWorkbook();
             ISheet sheet=  workbook.CreateSheet("员工数据");
              IRow HeaderRow = sheet.CreateRow();
              HeaderRow.CreateCell(, CellType.STRING).SetCellValue("姓名");
              HeaderRow.CreateCell(, CellType.NUMERIC).SetCellValue("年龄");
              HeaderRow.CreateCell(, CellType.STRING).SetCellValue("日期");
              ICellStyle style = workbook.CreateCellStyle();
              IDataFormat frommate = workbook.CreateDataFormat();
              style.DataFormat = frommate.GetFormat("yyyy/m/d");
              for (int i = ;i< mode.Length; i++)
              {

                  IRow row = sheet.CreateRow(i);
                  row.CreateCell(,CellType.STRING).SetCellValue(mode[i-].Name);
                  row.CreateCell(, CellType.NUMERIC).SetCellValue(mode[i-].Age);
                 ICell indate = row.CreateCell(,CellType.NUMERIC);
                 indate.CellStyle = style;
                  indate.SetCellValue(mode[i-].Indate);

              }

                  using (Stream strea = File.OpenWrite(fileName))
                  {
                      workbook.Write(strea);
                  }
               MessageBox.Show("文件保存在：" + fileName,"消息提示框");

            }

<菜鸟学习大神勿喷> 测试代码，提供的大概思路，部分代码可精简