I'm kind of suprised with Rob's answer. Can you write an install in WiX
that does a minor upgrade of an installer written in IS? Perhaps. It'd
have to be very careful coding to keep all the primary keys and components
the same and get the media built the same way. I suppose it's technicially
possible.
But then you'd end up with the same possibly sloppy authoring that
InstallShield did and you'd need to come up with your own update.exe to
service it. What would be the advantage of that? What's the ROI? The
only value I see in this is a good thought excercise to test your MSI
chops.
If it was me, I suspect I'd do a complete cleanup / refactoring of the
install and major upgrade it.
From: "Rob Mensching"
Sent: Sunday, May 13, 2012 4:42 PM
To: "General discussion for Windows Installer XML toolset."
Subject: Re: [WiX-users] Update from Install Shield
With very careful coding, you should be able create a minor upgrade from
an
InstallShield based MSI. It's all just MSI in the end.
On Fri, May 11, 2012 at 12:34 AM, Christoph Goetz
wrote:
> Sorry
>
>
> Hi,
>
> we use Install Shield but we want to change to WIX.
> If we want to go to WIX with an upgrade, we have to use an Major
Upgrade,
> right?
> Can we after using the Major Upgrade for the next Version come out
without
> Install Shield?
> I mean if we kann make minor upgrades upon the major upgrade.
> Is it possible to go back, with uninstallating the updgrade, to the
> install shield Version.
>
> Christoph
>
>
>
>
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