How to save .xls file through portal

Currently i have a .xls file uploaded in my oracle portal. The idea is to enable all user to read only the .xls file and to enable only authorized user to read-write and save the changes made to the .xls file. How am i able to do this? Please give me a step-by-step solution since I'm very new to oracle portal 10g.
TQ
Edited by: user10869241 on Jan 28, 2009 4:44 PM

If the Excel spreadsheet is published as a File Item, grant Manage access on the item (requires Item Level Access to be enabled on the page) to the authorized user (or group) that makes the updates to the spreadsheet so that s/he can upload the updated spreadsheet whenever needed. Then just grant View access on that same file item to the group(s) or individual(s) that just need to view the spreadsheet. They'll still be able to save off the spreadsheet to their pc, so utilize the protection settings in Excel, if needed.

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