Save XLS Using Interop Excel

Question

The Current Setup:

So, I can use the following code to save a file as an XLS:

_myWorkbook.SaveAs("FileName.xls", Excel.XlFileFormat.xlWorkbookNormal)

I can also use the following code to save a file as an XLSX (Since I use Office 2010):

_myWorkbook.SaveAs("FileName.xlsx", Excel.XlFileFormat.xlWorkbookDefault)

The Issue:

I have tried (unsuccessfully) to save the file as an XLSX using the following code:

_myWorkbook.SaveAs("FileName.xlsx", Excel.XlFileFormat.xlExcel12)

Why does this not work? Last I checked, Excel 12 was Excel 2007 (a version that supports XLSX). Am I missing something?

(For those interested, I get a This extension can not be used with the selected file type error)

@Sorax: It does...but when the file is opened, there is a The document is not in the format the extension says it is in. Do you trust it? dialog that I'd rather avoid. — Onion-Knight
– Onion-Knight, Commented Apr 5, 2012 at 15:03
I haven't used the 2010 interop, I've switched to the OpenXML SDK, but I'm familiar with prior interops and I'm at a loss. What you're doing should work. I wish I could help. — Sorax
– Sorax, Commented Apr 5, 2012 at 15:07

pabdulin · Accepted Answer · 2012-04-05 16:46:56Z

18

Actually XlFileFormat.xlExcel12 is Excel 12.0 binary format (xlsb) , for OpenXML (i.e. xlsx) you need to use XlFileFormat.xlOpenXMLWorkbook enum value.

For a complete reference see here.

answered Apr 5, 2012 at 16:46

pabdulin

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