NPOI导入导出Excel

1、读取

using (FileStream stream = new FileStream(@"c:客户资料.xls", FileMode.Open, FileAccess.Read))

{

HSSFWorkbook workbook = new HSSFWorkbook(stream);

MessageBox.Show(workbook.GetSheetName(0));

}

• 读取字符串类型数据 MessageBox.Show(sheet.GetRow(3).GetCell(4).StringCellValue); 读取数字类型数据NumericCellValue 。

• 判断单元格数据类型：读取 GetCell(4).CellType ，与 HSSFCell 类中定义的常量比较即可。

• 判断使用区域：结束行号： Last RowNum

2.写入Excel

HSSFWorkbook workbook = new HSSFWorkbook();

HSSFSheet sheet = workbook.CreateSheet();

HSSFRow row = sheet.CreateRow(0);

row.CreateCell(0, HSSFCell.CELL_TYPE_STRING).SetCellValue("Hello");

row.CreateCell(1, HSSFCell.CELL_TYPE_NUMERIC).SetCellValue(3.14);

using (FileStream stream = new FileStream(@"c:1.xls", FileMode.OpenOrCreate, FileAccess.ReadWrite))

{

workbook.Write(stream);

}