C# Excel 2010 Workbook Open error

Question

We recently upgraded from Excel 2007 to Excel 2010, and we have found that existing code started failing.

Exception Message:

Office has detect

Answer 1

Late to the game here, but this is a common annoyance: you need to define a 'Trusted Location'.

You're not the only developers encountering this problem when your code tries to open a spreadsheet file, and "Office has detected a problem with this file. To help protect your computer this file cannot be opened." is an extremely unhelpful error message.

Look up the Trusted Location code published by Daniel Pineault on DevHut.net in 2010:

DevHut code example: Trusted Location using VBScript

I'll get downvoted to hellandgone for posting VBA in a C# forum, so I'd better not post my implementation of Daniel's code (yes, I'm a VBA developer, bashing out VBA macros all day, not a real coder working with pointy things and curly braces). If you really want to see the VBA, it's in a reply to another post:

https://stackoverflow.com/questions/2962728/office-trusted-locations/28115700#28115700

I believe the proper salutation is 'Share and Enjoy'.

Do, please, put an acknowledgement of the original author, Daniel Pineault, if you reuse the code: it's been widely published without attribution on 'Expert' sites, and that's rather rude.