C# .NET 使用 NPOI 生成 .xlsx 格式 Excel

IWorkbook workbook = new XSSFWorkbook();
ISheet sheet = workbook.CreateSheet("-");
IRow row = sheet.CreateRow(0);//標題

IRow titleRow = row.CreateCell(0);
Row.SetCellValue("標題列1");

IRow dataRow = sheet.CreateRow(1);
dataRow.CreateCell(0).SetCellValue(“第一行第一列數值”);

string fileName = "demo.xlsx";

FileStream file = new FileStream("C:\\Desktop\\" + fileName, FileMode.Create);//把這個HSSFWorkbook實例寫入文件
workbook.Write(file);
file.Close();

/*如果此處要下載*/
//MemoryStream ms = new MemoryStream();
//workbook.Write(ms);