Detect silent install in .NET Custom Action

c#, windows-installer

Solution

Taking the hint from nobugz, I did the following:

On the Custom Actions view of the .msi setup project, I added the following to my CustomActionData (to pass the UILevel through to my custom installer):

/UILevel="[UILevel]"

Within my C# code for the code derived from base class Installer, I added code to get the value:

string uiLevelString = Context.Parameters["UILevel"];

It was then simple to parse the string for an int value. If the value is <= 3, it is a silent install.

Problem

How do you detect that the install is running in silent mode? I have a custom application that I've added a .msi setup project. I run the .msi file with the /qb switch, and in my custom installer c# code I would like to be able to detect this. Edit: nobugs says to test the UILevel property. How do I access the UILevel property from a class derived from the System.Configuration.Install.Installer class?

Original source