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ClosedXML
ClosedXML is a .NET library for reading, manipulating and writing Excel 2007+ (.xlsx, .xlsm) files. It aims to provide an intuitive and user-friendly interface to dealing with the underlying OpenXML API.
We use Closed XML in a .Net Core service app - Still under windows but it *should* be ok under linux - I don't think it has deps. on System.Data.OleDb
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Sevalla
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NPOI
a .NET library that can read/write Office formats without Microsoft Office installed. No COM+, no interop.
Try NPOI
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Open-XML-SDK, which is officially supported by Microsoft.
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Have you tried https://github.com/ExcelDataReader/ExcelDataReader ?
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If all you need is the ability to read data out of a worksheet, and not create a worksheet, then I could suggest my own library Sylvan.Data.Excel. It only supports reading data, but is open sourced and MIT licensed. It supports .xlsx and .xls files.
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It isn't exactly a full-featured library, but it is cross-platform and is the fastest and lowest allocating Excel reader that I'm aware of for .NET. That might not be a huge concern if you're just processing the occasional file.
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ExcelMapper
An Excel to object mapper. Maps POCOs to and from Excel. Configuration via convention, attributes, or fluent methods.
You should take a look at ExcelMapper https://github.com/mganss/ExcelMapper
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InfluxDB
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