I need to manuplate an excel sheet workbook (add sheets/ add data/ hide columns / protect cells with password / change fields contents/ etc etc)
should I use the COM objects provided by microsoft (but then i think they have few problems being used in asp.NET)
or is there a good (commurcial or free) library / plug in to be used for doing this kind of activity.
please help
try spread Sheet Gear third party component
http://www.spreadsheetgear.com/