Wix bootstrapper conditional installation - wix

Question

I created a wix bootstrapper app with a user interface that has 2 checkboxes. The user can choose what to install. This is part of my bootstrapper app:
<MsiPackage
InstallCondition="ClientCondition"
DisplayInternalUI='yes'
Visible="yes"
SourceFile="D:\Project\FirstInstaller.msi"
/>
<MsiPackage
InstallCondition="ServerCondition"
DisplayInternalUI='yes'
Visible="yes"
SourceFile="D:\Project\SecondInstaller.msi"
/>
Problem :
For example, I already have FirstInstaller installed, and I'm trying to install the second one. Due to a false condition, my FirstInstaller will be uninstalled. But this is not what I expected. How do I fix this and have some "ignore" value for the Msi package in the chain ?

Answer 1

I don't know wich language your bootstrapper is written on, but, as option, you can control your msi installation directly from your code via cmd and msiexec command.
Code example for C#:
var command = #"/c msiexec /i c:\path\to\package.msi";
//for silent: /quiet /qn /norestart
//for log: /log c:\path\to\install.log
//with properties: PROPERTY1=value1 PROPERTY2=value2";
var output = string.Empty;
using (var p = new Process())
{
p.StartInfo = new ProcessStartInfo()
{
FileName = "cmd.exe",
Arguments = command,
UseShellExecute = false,
RedirectStandardError = true,
RedirectStandardOutput = true,
CreateNoWindow = true,
};
p.Start();
while (!p.StandardOutput.EndOfStream)
{
output += $"{p.StandardOutput.ReadLine()}{Environment.NewLine}";
}
p.WaitForExit();
if (p.ExitCode != 0)
{
throw new Exception($"{p.ExitCode}:{ p.StandardError.ReadToEnd()}");
}
Console.WriteLine(output);
Console.ReadKey();
}