C# 文件导出 EXCEL

#region 读excel
            //using (Stream stream = File.OpenRead(@"c:\Book1.xls"))
            //{
            //    //内存中的excel文件
            //    HSSFWorkbook workBook = new HSSFWorkbook(stream);
            //    //读取sheet
            //    HSSFSheet sheet = workBook.GetSheetAt(0);

            //    //Console.WriteLine(sheet.GetRow(0).GetCell(0).NumericCellValue);
            //    StringBuilder sb = new StringBuilder();

            //    for (int i = 1; i <= sheet.LastRowNum; i++)
            //    {
            //        //行
            //        HSSFRow row = sheet.GetRow(i);
            //        //遍历列
            //        for (int j = 0; j < row.LastCellNum; j++)
            //        {
            //            HSSFCell cell = row.GetCell(j);
            //            //判断单元格的类型。分别用不通类型读取单元格的值
            //            if (cell == null)
            //            {
            //                sb.Append("");
            //                continue;
            //            }
            //            if (cell.CellType == HSSFCell.CELL_TYPE_STRING)
            //            {
            //                sb.Append(cell.StringCellValue);
            //            }
            //            else if(cell.CellType == HSSFCell.CELL_TYPE_NUMERIC)
            //            {
            //                sb.Append(cell.NumericCellValue);
            //            }
            //        }
            //        sb.Append("\r\n");
            //    }
            //    Console.WriteLine(sb.ToString());
            //}
#endregion

            #region 创建excel
            ////创建excel
            ////在内存中创建了一个空的excel文件
            //HSSFWorkbook workBook = new HSSFWorkbook();
            ////在workBook中创建一个sheet
            //HSSFSheet sheet = workBook.CreateSheet();
            ////sheet中创建行
            //HSSFRow row = sheet.CreateRow(0);
            ////创建cell 并设置cell的类型
            //HSSFCell cell = row.CreateCell(0,HSSFCell.CELL_TYPE_STRING);
            //cell.SetCellValue("15028008001");
            ////
            //cell = row.CreateCell(1, HSSFCell.CELL_TYPE_NUMERIC);
            //cell.SetCellValue(456);

            //using (Stream stream = File.OpenWrite("c:\\1111.xls"))
            //{
            //    workBook.Write(stream);
            //}
            //Console.WriteLine("chenggong ");
#endregion