How to detect net core 3.1 windows desktop app runtime is installed

Question

I am trying to detect if the net core 3.1 windows desktop app runtime is installed and not run the installer if it is.

However on a test system that has net core 3.1 windows desktop app runtime installed I can see the installer run and after looking at the log, NetCoreInstalled, evaluates to 0 even though the directory exists. How can I get this working?

<Fragment>

    <util:FileSearch 
      Id="NetCoreInstalled" 
      Variable="NetCoreInstalled"
      Path="[ProgramFiles64Folder]dotnet\shared\Microsoft.WindowsDesktop.App\3.1.0"
      Result="exists" />
    
    <PackageGroup Id="NetCore310x64">


        <ExePackage
     Id="NetCore310x64"
     Cache="no"
     Compressed="yes"
     PerMachine="yes"
     InstallCondition="(VersionNT64) AND (NOT NetCoreInstalled)"
          DetectCondition="NetCoreInstalled"
          InstallCommand="/quiet /passive"
     Vital="yes"
     Permanent="yes"
     SourceFile="..\..\..\Requirements\windowsdesktop-runtime-3.1.0-win-x64.exe"
     Name="Redist\windowsdesktop-runtime-3.1.0-win-x64.exe" />

    </PackageGroup>


  </Fragment>

Where did you find the Conditions such as 'InstallCondition="(VersionNT64) AND (NOT NetCoreInstalled)"'? — Fy Z1K, Apr 11 '20 at 15:17

score 2 · Accepted Answer · answered Dec 17 '19 at 03:09

2

You want DirectorySearch, not FileSearch.

answered Dec 17 '19 at 03:09

Bob Arnson

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See https://github.com/dotnet/designs/blob/master/accepted/install-locations.md for the official doc. – Bob Arnson Dec 17 '19 at 19:58

How to detect net core 3.1 windows desktop app runtime is installed

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