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I'm using the NPOI library to read and write XLSX spreadsheets in a C# application. This library seems to work, I could open, write and re-open an Excel file.

I found a problem when I tried to open a NPOI file with MS Excel, its say that the file has some corrupted content. However NPOI library can open its file. I could understand that this is a compression issue, seems that the zip compression of xlsx is not valid for Excel and this issue is caused by ICSharpCode.SharpZipLib.dll, for this reason a copy of this dll is distribuited with the NPOI library.

I tried to add this dll in my project references, but the compression still doesn't work. How to solve this issue?

JasonMArcher
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Tobia
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2 Answers2

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Try to use DotNetCore.NPOI with version 1.2.0 (it`s works for me).

Maksym Voronytskyi
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I recommmend you use official NPOI release: https://www.nuget.org/packages/NPOI/

Tony Qu
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