That's correct - they're uncomfortably like some C /C++ types, to use that as an approximate analogy. People trip over this sometimes with the standard properties. For example the Installed property isn't set to true or false. It's a string which (IIRC) is a date.
Phil Wilson
-----Original Message-----
From: Buddell, James [mailto:
[hidden email]]
Sent: Wednesday, July 01, 2009 6:04 AM
To: General discussion for Windows Installer XML toolset.
Subject: Re: [WiX-users] Boolean paramaters
>From memory so this may not be 100% - Windows Installer evaluates
properties as true if they are set, and false if they are not. i.e.
setting MYFLAG=true on the command line will result in boolean condition
tests on MYFLAG returning true, but so will setting MYFLAG=false, as the
MYFLAG property will be set to the string false.
So you'll need to use string comparison tests, and you'll probably want
to use MYFLAG~="true" which will perform a case-insensitive string
comparison, i.e. true for MYFLAG=True or MYFLAG=true, but not for
MYFLAG=false.
Cheers,
James
-----Original Message-----
From: Christopher Karper [mailto:
[hidden email]]
Sent: 01 July 2009 12:25
To: General discussion for Windows Installer XML toolset.
Subject: Re: [WiX-users] Boolean paramaters
You have a boolean operator right in that very example... I'm just
winging
this, but try:
<Condition Message="Required prerequisite (PowerShell 1.0) is not
found.">
<![CDATA[Installed OR ((POWERSHELL >= "1.0") And (MYFLAG))]]>
</Condition>
On Wed, Jul 1, 2009 at 12:21 AM, sandun css <
[hidden email]> wrote:
> Hi,
>
> I have some conditions in my msi, like the following,
>
>
> <Condition Message="Required prerequisite (PowerShell 1.0) is not
found.">
>
> <![CDATA[Installed OR (POWERSHELL >= "1.0")]]>
>
> </Condition>
>
> But I need to run these conditions only if a certain parameter is set
to
> 'true'. (i.e. msiexec /i installer.msi MYFLAG=true)
>
> Are there boolean parameters, or do I need to treat 'true' and 'false'
> valuse as strings?
>
> Thanks,
>
> Sandun
>
>
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