Workbook wb = new Workbook();
wb.Worksheets[0].Cells[“B3”].Value = $"{typeof(Workbook).Assembly} {DateTime.Now}";
wb.Save(“test.xlsx”);
wb.Dispose();
easy code, but sometimes the output file can not be open by office 2021,
as we all know xlsx is just a zip file, I found xl\workbook.xml is empty,
copy <?xml version="1.0" encoding="UTF-8" standalone="yes"?><workbook xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="x15" xmlns:x15="http://schemas.microsoft.com/office/spreadsheetml/2010/11/main"><fileVersion appName="xl" lastEdited="4" lowestEdited="4" rupBuild="9302" /><workbookPr /><bookViews><workbookView xWindow="240" yWindow="120" windowWidth="14940" windowHeight="9225" activeTab="0" /></bookViews><sheets><sheet name="Sheet1" sheetId="1" r:id="rId3" /></sheets><definedNames /><calcPr fullCalcOnLoad="1" /></workbook> back to zip, can open success