C# 读写Excel文件的类库NPOI
建立文件
HSSFWorkbook workbook2003 = new HSSFWorkbook(); //新建xls工作簿
workbook2003.CreateSheet("Sheet1"); //新建3个Sheet工作表
workbook2003.CreateSheet("Sheet2");
workbook2003.CreateSheet("Sheet3");
FileStream file2003 = new FileStream(@"E:\Excel2003.xls", FileMode.Create);
workbook2003.Write(file2003);
file2003.Close(); //关闭文件流
workbook2003.Close();
读取
IWorkbook workbook = null; //新建IWorkbook对象
string fileName = "D:\\表格.xlsx";
FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read);
if (fileName.IndexOf(".xlsx") > 0) // 2007版本
{
workbook = new XSSFWorkbook(fileStream); //xlsx数据读入workbook
}
else if (fileName.IndexOf(".xls") > 0) // 2003版本
{
workbook = new HSSFWorkbook(fileStream); //xls数据读入workbook
}
ISheet sheet = workbook.GetSheetAt(0); //获取第一个工作表
IRow row;// = sheet.GetRow(0); //新建当前工作表行数据
for (int i = 0; i < sheet.LastRowNum; i++) //对工作表每一行
{
row = sheet.GetRow(i); //row读入第i行数据
if (row != null)
{
for (int j = 0; j < row.LastCellNum; j++) //对工作表每一列
{
string cellValue = row.GetCell(j).ToString(); //获取i行j列数据
Console.WriteLine(cellValue);
}
}
}
Console.ReadLine();
fileStream.Close();
workbook.Close();
创建
HSSFWorkbook workbook2003 = new HSSFWorkbook(); //新建工作簿
workbook2003.CreateSheet("Sheet1"); //新建1个Sheet工作表
HSSFSheet SheetOne = (HSSFSheet)workbook2003.GetSheet("Sheet1"); //获取名称为Sheet1的工作表
//对工作表先添加行，下标从0开始
for (int i = 0; i < 10; i++)
{
SheetOne.CreateRow(i); //创建10行
}
//对每一行创建10个单元格
HSSFRow SheetRow = (HSSFRow)SheetOne.GetRow(0); //获取Sheet1工作表的首行
HSSFCell[] SheetCell = new HSSFCell[10];
for (int i = 0; i < 10; i++)
{
SheetCell[i] = (HSSFCell)SheetRow.CreateCell(i); //为第一行创建10个单元格
}
//创建之后就可以赋值了
SheetCell[0].SetCellValue(true); //赋值为bool型
SheetCell[1].SetCellValue(0.000001); //赋值为浮点型
SheetCell[2].SetCellValue("Excel2003"); //赋值为字符串
SheetCell[3].SetCellValue("123456789987654321");//赋值为长字符串
for (int i = 4; i < 10; i++)
{
SheetCell[i].SetCellValue(i); //循环赋值为整形
}
FileStream file2003 = new FileStream(@"E:\Excel2003.xls", FileMode.Create);
workbook2003.Write(file2003);
file2003.Close();
workbook2003.Close();
https://www.cnblogs.com/zagelover/articles/3291536.html
https://www.cnblogs.com/amylis_chen/p/7841261.html(主要)
https://blog.csdn.net/echoerror/article/details/80902493
