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Editorial Team
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Asked: 2026-05-23T18:32:31+00:00

The xls file opens fine and the data is correct but each time I

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The xls file opens fine and the data is correct but each time I open the file, the warning:

“The file you are trying to open, [filename] is in a different format… Verify that the file is not corrupted…”

pops up. I’ve read that there is no cleaner workaround to this except tweaking the registry/group policy to ‘suppress’ the message. But then, this doesn’t appear on real xls files made from excel.

So is there a way/format that excel will open the file without this warning message? Should exporting the datagrid to xml/csv work?

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1 Answer

  1. Editorial Team

    found the answer same day, forgot to post the answer as soon as I got it working.

    Here’s a handy library to help create and read excel files properly. Works on SL4 but you could just tweak the source code to make it usable in SL3
    http://excellite.codeplex.com/

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