How can I determine the ProductCode for the included products in my WiX ManagedBootstrapperApplication at runtime?

Question

I have a managed bootstrapper application with a bundle that includes four products. Each of the products are defined with "*" for the Id and have a unique UpgradeCode.

In my managed bootstrapper, I need to get the ProductCode (GUID) for the products that are part of my bundle. The detect event handlers' event args (such as DetectPackageCompleteEventArgs) have a PackageId value which is the name of the msi (ex: the "Common.msi" package has a PackageId of "Common.msi").

I also checked the BootstrapperApplicationData.xml file, which has the ProductCode and UpgradeCode of the bundle itself, but not in the WixPackageProperties nodes for the individual products.

In the case of a related package being detected (upgrade), the ProductCode is included in the DetectRelatedMsiPackageEventArgs, but that event doesn't fire when the running the installer for the currently-installed version (ie: clicking "Modify" on Add/Remove Programs)

How can I determine at runtime in my MBA what the ProductCode is for the included products?

Additional info:

Ultimately, I'm using the product code to get the ARPINSTALLLOCATION value using MsiGetProductInfo(productCode, "InstallLocation", strbuffer, len); This is specifically for the case where the user is "modifying" an existing installation (ie: running the same installer version as an already installed bundle -- not an upgrade) and I need to determine the folder to which they installed originally.

Answer 1

Short answer: The product code isn't provided to the BA. But an explicit registry entry (for example, following the "remember property pattern" that Rob discusses) is going to be more reliable and easier to implement than ARPINSTALLLOCATION/MsiGetProductInfo.

Longer answer: Burn runs detection the same way in all "modes" but explicitly doesn't send package-level detection messages when the version of the package in the packages is the same that's installed on the machine.

The place for this kind of static data is in the BA manifest but in v3.8 it doesn't include the product code. Please file a feature request.