Vb: how to convert .XLS to .XLSX

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Excel-2016

Hi, I am having some problem which is right now I had transfer my data into excel. But, since my computer no longer support xls, i need to convert to xlsx. Here is my coding

'Declaration for XLS
Dim excelApp As New excel.Application
Dim wbReport As Workbook
Dim wsReport As Worksheet
Dim rejRs As ADODB.Recordset

excelApp.Visible = False
excelApp.ScreenUpdating = False
excelApp.Interactive = False
excelApp.IgnoreRemoteRequests = True

Set wbReport = excelApp.Workbooks.Add
Set wsReport = wbReport.ActiveSheet

'***Formatting
With wsReport
'Here will be my data that will transfer to excel
.Cells(1, 1).Value = "Student REPORT : " & stud

'This is anywhere code state I will save my excel
wbReport.SaveAs "C:\studReport\" & stud & "_WIP_" & Format(xserverdate, "YYYYMMDD") & ".xls"

What I have tried:

Right now, I try to change the code at SaveAs from xls become xlsx

wbReport.SaveAs "C:\studReport\" & stud & "_WIP_" & Format(xserverdate, "YYYYMMDD") & ".xlsx"

And it said the format is not valid. How can I convert to xlsx?
Please help

Update:: Since my excel is 2003, i cannot convert to xlsx. Thanks for the help

Posted 4-Aug-22 17:55pm

Member 14670863

Updated 21-Aug-22 21:42pm

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0x01AA · Accepted Answer · 2022-08-04T18:43:00

You need to specify the file format explicitely. This works for me:

private void buttonExcel97_Click(object sender, EventArgs e)
     {
         string safeExcelFilePath = @"c:\temp\cp.excel";

         string excel97File = Path.Combine(safeExcelFilePath, "Excel97.xls");
         string excelOpenXMLFile = Path.Combine(safeExcelFilePath, "ExcelOpenXML.xlsx");

         // Excel Application
         Microsoft.Office.Interop.Excel.Application _excel = new _Excel.Application();

         // Open workbook
         Workbook workbook1 = _excel.Workbooks.Open(excel97File);

         // Save as xlsx
         workbook1.SaveAs(excelOpenXMLFile, XlFileFormat.xlOpenXMLWorkbook);

         // Note: In case there are Macros involved
         //     workbook1.SaveAs("FileName.xlsm", XlFileFormat.xlOpenXMLWorkbookMacroEnabled);
     }

For detail information have a look here: XlFileFormat enumeration (Excel) | Microsoft Docs[^]