问题
Due to user confusion, our app requires separate installers for 32-bit and 64-bit versions of Windows. While the 32-bit installer runs fine on win64, it has the potential to create support headaches and we would like to prevent this from happening.
I want to prevent the 32-bit MSI installer from running on 64-bit Windows machines. To that end I have the following condition:
<Condition Message="You are attempting to run the 32-bit installer on a 64-bit version of Windows.">
<![CDATA[Msix64 AND (NOT Win64)]]>
</Condition>
With the Win64 defined like this:
<?if $(var.Platform) = "x64"?>
<?define PlatformString = "64-bit"?>
<?define Win64 ?>
<?else?>
<?define PlatformString = "32-bit"?>
<?endif?>
Thing is, I can't get this check to work right. Either it fires all the time, or none of the time. The goal is to check presence of the run-time msix64 variable against the compile-time Win64 variable and throw an error if these don't line up, but the logic is not working how I intend it to. Has anyone come up with a better solution?
回答1:
Include the Condition element only in your 32-bit package (i.e., using ?if? preprocessor statement). The Condition would be "NOT Msix64": Launch conditions are things that must be true, so if Msix64 is set, the launch condition would fail and that means it's an x64 OS and a 32-bit package and the correct thing to do is to block.
回答2:
We use the following...
<?if $(var.ProcessorArchitecture)=x86 ?>
<Condition Message="!(loc.LaunchCondition_Error64)">
<![CDATA[Installed OR Not VersionNT64]]>
</Condition>
<?endif?>
回答3:
The condition element works with windows installer properties, which exist during an installation.
However, you are defining a Win64 as a wix variable, not a windows installer property. Wix variables only exist while the setup is created. You have to reference them as $(var.MyWixVariable) where you use them, and the wix preprocessor will then replace them with their defined value.
I would try this instead:
<?if $(var.Platform) = "x64"?>
<?define PlatformString = "64-bit"?>
<Property Id="Win64" Value="1" />
<?else?>
<?define PlatformString = "32-bit"?>
<?endif?>
If $(var.Platform) has the right value when the setup is created, then this will cause a "Win64" property to be recorded in the windows installer database (i.e. the MSI file) and the property will be available during installation for use in a condition element.
回答4:
Add this condition
<Condition Message="This is designed for 32bit OS">%PROCESSOR_ARCHITECTURE ~= "x86" AND %PROCESSOR_ARCHITEW6432 <> "amd64"></Condition>
You could create one installer with a 32bit component and a 64bit component and put these two conditions in the respective components
<Component Id="bit32Component" Guid="..." Feature="ProductFeature">
<Condition>%PROCESSOR_ARCHITECTURE~="x86" AND %PROCESSOR_ARCHITEW6432<>"amd64"></Condition>
</Component>
<Component Id="bit64Component" Guid="..." Feature="ProductFeature">
<Condition>%PROCESSOR_ARCHITECTURE~="amd64" OR %PROCESSOR_ARCHITEW6432~="amd64"></Condition>
</Component>
here is a reference I used
http://blogs.msdn.com/david.wang/archive/2006/03/26/HOWTO-Detect-Process-Bitness.aspx
来源：https://stackoverflow.com/questions/2458550/wix-prevent-32-bit-installer-from-running-on-64-bit-windows