Read Office Excel files from the Azure application

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We have a requirement to read an excel sheet from the Azure worker role. I understand that we can do this using Open XML SDK. It seems we cannot use Interop assemblies (correct me if I am wrong). We need to able to read ALL version of excel (2003 and older). Any pointers will be appreciated.


I think NPOI is available for the case, because NPOI can read old excels(but I have never tried in practice).
This is a link of NPOI http://npoi.codeplex.com/

And Open XML SDK can not read the excel (2003 and older).