Any free XLSX ( Excel 2007 or above) reader and writer Helper Class or Library

Now I am in need of a Excel Library. Any free XLSX ( Excel 2开发者_Python百科007 or above) reader and writer Helper Class or Library

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Check out the OpenXML SDK. There are also a number of questions on SO that relate to using the OpenXML SDK, so this site is a great resource as well.

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See OpenXML 2.0 from MS...

It is a free library that does NOT require office to be installed... you can read + write Office files including Excel and Word (Version 2007 and up...).

IF you need more features (like rendering to PDF etc.) then you would need some 3rd-party library...