How to suppress the file corrupt warning at Excel download?

excel coldfusion
Arnkrishn picture Arnkrishn · Jun 2, 2009 · Viewed 75.7k times · Source

I have a web page which links to an Excel 2007 worksheet. It is a .xls file and not .xlsx file. When I click on the link I get the usual dialog box to either open/save the Excel file. On clicking 'Open', I get the following warning message-

The file you are trying to open, 'filename.xls' is in a different format than specified by the file extension. Verify that the file is not corrupted and is from a trusted source before opening the file. Do you want to open the file now?

Can I some how suppress this warning message programmatically (i.e. to hide it or prevent it from showing up?) I'm using ColdFusion for web development.

Answer

jgallant picture jgallant · Jun 2, 2009

If you don’t want to look for a solution, but just want to solve the problem, insert this key in your registry to suppress the notification:

[HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Excel\Security] “ExtensionHardening”=dword:00000000

You can accomplish the above by doing the following:

  1. Open your Registry (Start -> Run -> regedit.exe)
  2. Navigate to HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\OFFICE\12.0\EXCEL\SECURITY
  3. Right click in the right window and choose New -> DWORD
  4. Type “ExtensionHardening” as the name (without the quotes)
  5. Verify that the data has the value “0″

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