问题
I have a WiX installer project that utilises a custom dialog box to ask for parameters to update a web.config file and run a database script on install. Everything works correctly and the application is installed and runs correctly.
However, the custom dialog box is also displayed when I uninstall the software and it certainly doesn't need to be (as I'm not updating a web.config file).
Is there a way to suppress the custom dialog when the application is being uninstalled?
(I should also remove the sql procs I install, at uninstall time but that is outside of this issue).
回答1:
The solution to your question is to condition the custom action with the condition (Not REMOVE="ALL"). This will make the action run on fresh install and maintenance install, but not on uninstall. If you don't need to run on maintenance install, but only on a fresh install you can set the condition to be: (Not Installed AND Not(REMOVE="ALL")). Full list of MSI properties and brief descriptions here: http://msdn.microsoft.com/en-us/library/aa370905(VS.85).aspx.
The sequencing and custom action logic in MSI files is VERY complicated. It really pays off to avoid custom actions whenever you can.
There is more - all MSI files have built-in support for silent installation. This means that the entire GUI sequence can be skipped, and the MSI file installed without user interaction. This is a crucial feature for corporate deployment via SMS / SCCM or other deployment mechanisms. Showing a custom dialog box when the setup is run in silent mode is a violation of this basic MSI feature. You can work around this by properly conditioning the display of the dialog based on the property UILevel: http://msdn.microsoft.com/en-us/library/aa372096(VS.85).aspx. Just to keep things interesting and confusing Microsoft has defined 4 levels of GUI during an installation ranging from completely silent, through various options such as progress bar only etc... See the link for details.
I could add a lot of details here about MSI sequences, conditions, custom actions and similar, but it wouldn't answer your question. Please add any follow-up questions.
回答2:
Wix snippet to show the creation of a custom action and its insertion into the InstallExecuteSequence:
<!--Custom Action Sample Section-->
<Binary Id='VBScriptCustomAction.vbs' SourceFile='VBScriptCustomAction.vbs'/>
<CustomAction Id='test' BinaryKey='VBScriptCustomAction.vbs' VBScriptCall='Hello' Return='ignore'/>
<InstallExecuteSequence>
<Custom Action="test" Sequence='4111'><![CDATA[NOT REMOVE~="ALL"]]></Custom>
</InstallExecuteSequence>
<!-- End of Custom Action Sample Section-->
来源：https://stackoverflow.com/questions/1528438/stopping-display-of-custom-dialog-boxes-in-wix-uninstall