[Solved] Excel cannot open the file 'File.xlsx' because the file format or extension is not valid.

meeram39...

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User: meeram395
Posted: on May 14, 2015 03:23 AM
Forum: Excel
Answer: 2
Views: 10264

Sir,

I was trying to implement the functionality mentioned in this URL, http://www.aspsnippets.com/Articles/Export-Windows-Forms-DataGridView-to-Excel-using-C-and-VBNet.aspx, and am able to do that without any issues. The excel able generated successfully.

However, while trying to open the file I am getting an error saying that "Excel cannot open the file "File.xlsx" because the file format or extension is not valid. Verify that the file has not been corrupted and that the file extension matches the format of the file.". I am using .Net Framework 4.5 and Excel 2013.

Could you please advise me where I am going wrong here?

Download FREE API for Word, Excel and PDF in ASP.Net

Mudassar

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User: Mudassar
Replied: on May 14, 2015 03:35 AM
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Have you tried sample directly or made some changes? As the sample works for me in Excel 2013

meeram39...

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User: meeram395
Replied: on May 15, 2015 03:58 AM
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Issue resolved. The program works correctly. Issue was, I was deleting and recreating the file again which is causing a problem.

Thank you Mudassar Sir , Andrea.

I agree, here is the link: https://www.e-iceblue.com/Introduce/spire-office-for-net-free.html

[Solved] Excel cannot open the file 'File.xlsx' because the file format or extension is not valid.

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