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.netinstallationwixwindows-installerwix3

Detect if an assembly is in the GAC via WiX 3?

I'd like to detect in WiX 3 (preferably via a Condition) whether a particular assembly is in the GAC. I know the name, version, and public key token of said assembly. Is there any built in way to do this, or will I have to write a CustomAction to do it? And how would I go about setting up that CustomAction? (This would be before the install begins.)

Solution

  • You can use FileSearch to search for the file in %windir%\assembly\GAC (If you know all the other values) a bit hacky but works.
    The full file path will be stored inside a property which you can use in condition before the install start.