[wix-devs] Can anyone give me a nice simple example of returning values from a Custom Action.

Rob Mensching rob at firegiant.com
Mon Sep 11 09:56:08 PDT 2017

Wrong mailing list. Try wix-users. This list is about developing the WiX Toolset itself.

-----Original Message-----
From: wix-devs [mailto:wix-devs-bounces at lists.wixtoolset.org] On Behalf Of Paul Mumford via wix-devs
Sent: Monday, September 11, 2017 4:20 AM
To: wix-devs at lists.wixtoolset.org
Cc: Paul Mumford <paul.mumford at gmail.com>
Subject: [wix-devs] Can anyone give me a nice simple example of returning values from a Custom Action.

Hi, been banging my head against the wall on this!

I have a c# custom action to select an option and enter some text, how can I reference and act on it in the wxs. Really id like to optionally install different components depending on the select but I can seem to reference the property returned in session.

Here is sample:

    <Property Id="THING_INSTALL_TYPE" Value="Default" />

    <Binary Id="THINGSetupCustomActionsDLL"
    <CustomAction Id="SelectClientServerID"
DllEntry="SelectClientServer" Execute="immediate" Return="check" />

Will happily run the custom DLL.

In c# I say:

session["THING_INSTALL_TYPE"] = "Client";

The in WiX I want to conditionally install components based on the result, see condition in bold below. I have to do it this way because of various reasons but it just doesnt seem to return the property back from the custom action. Any ideas?

            <Component Id='AppComponentID'
              <File Id='THINGEXEFileID' Name='THING.exe' DiskId='1'
Source='.\Compiled\THING.exe' KeyPath='yes'>
                <Shortcut Id="startmenuTHINGLink"
Directory="ProgramMenuDir" Name="THINGWorkingDirectory='INSTALLDIR' Icon="
THING.exe" IconIndex="0" Advertise="yes" />
                <Shortcut Id="desktopTHING" Directory="DesktopFolder" Name="
THING" WorkingDirectory='INSTALLDIR' Icon="THINGApp.exe" IconIndex="0"
Advertise="yes" />
             * <Condition>**THING_INSTALL_TYPE = "Client"</Condition>*
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