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Adding a hidden attribute to a cell/row/column

May 24, 2013 at 3:52 PM
I'm using XLSX files as an interface for upload/download

I need to store some GUID's with the cell text so that if the user modifies a cell on the XLSX file, when I upload again I can read the GUID and not the cell text value.

Is there a way to store attributes on rows and columns, and for more granularity on cells?