I am attempting to modify a WIX installer package so that it can detect the presence of a specific Microsoft Knowledge Base patch/update, and then offer the user a chance to download and install it on-the-fly if the patch is not detect. My order of operations would be:
- Detect if user is installing on Windows 8.1 or not (trivial, compare against
VersionNT
). - Detect if KB 2883200 is already installed.
- If detected, provide a dialogue box offering the chance to download and install the package.
Steps 2
and 3
aren't 100% obvious to me. I've found a possible solution via another StackOverflow post, but I don't understand why both a hash and the KB number need to be provided. eg:
Sample Function
public static bool IsPatchAlreadyInstalled(string productCode, string patchCode)
{
var patches =
PatchInstallation.GetPatches(null, productCode, null, UserContexts.Machine, PatchStates.Applied);
return patches.Any(patch => patch.DisplayName == patchCode);
}
Use
IsPatchAlreadyInstalled("{F5B09CFD-F0B2-36AF-8DF4-1DF6B63FC7B4}", "KB2468871");// .NET Framework 4 Client Profile 64-bit
IsPatchAlreadyInstalled("{8E34682C-8118-31F1-BC4C-98CD9675E1C2}", "KB2468871");// .NET Framework 4 Extended 64-bit
IsPatchAlreadyInstalled("{3C3901C5-3455-3E0A-A214-0B093A5070A6}", "KB2468871");// .NET Framework 4 Client Profile 32-bit
IsPatchAlreadyInstalled("{0A0CADCF-78DA-33C4-A350-CD51849B9702}", "KB2468871");// .NET Framework 4 Extended 32-bit
So, the first part of my question would be: How can I use the code above to detect if the KB 2883200 patch is installed, and how do I generate the appropriate hash/UUID for the first argument passed to the function?
Next, I am trying to make a modal dialogue box appear, offering the user the chance to install the patch? If the user goes "Back" in the installer, I'd like the dialogue to re-appear when reaching the appropriate step again, in case they accidentally declined the offer to install the driver.
For the second and final part of my question: how do I provide such a dialogue box, and is there any existing method to download and install a MS KB patch through the installer, or do I have to implement my own methods from scratch?
Thank you.