Problem with referencing a COM object from ASP.NET Core 2.1 Targeting .NET 461.

[bmiller-pm]

Hi, I've found that just adding a reference to a COM object causes the build to fail with this single error:

….nuget\packages\microsoft.aspnetcore.razor.design\2.1.2\build\netstandard2.0\Microsoft.AspNetCore.Razor.Design.CodeGeneration.targets(69,5): error : The assembly path obj\Debug\net461\win7-x86\Interop.MyComLib.dll is invalid. Assembly paths must be rooted.

As a quick work-around I disabled the error in RazorTagHelper.cs, rebuilt and replaced my current 2.1.2\tasks\netstandard2.0\Microsoft.AspNetCore.Razor.Tasks.dll
It’s unclear to me where the path of the referenced COM import library is stored let alone created. Maybe the “rooted assembly path” check should verify it’s not a COM object first?

   // My work-around is:
       protected override bool ValidateParameters()
        {
           ...
            for (var i = 0; i < Assemblies.Length; i++)
            {
                if (!Path.IsPathRooted(Assemblies[i]))
                {
                    // my COM object doesn't seem to have a rooted path and this fails - so lets make it a warning instead
                    //Log.LogError("The assembly path {0} is invalid. Assembly paths must be rooted.", Assemblies[i]);
                    //return false;
                    Log.LogWarning("The assembly path {0} is invalid. Assembly paths must be rooted.", Assemblies[i]);
                }
            }

[mkArtakMSFT]

Thanks for contacting us, @quickwire.
In order for us to investigate this issue, please provide a minimalistic repro project that illustrates the problem.

[pranavkm]

Feel free to reopen this issue once you have a repro sample

[boris008]

Hello, I need to use SQLXMLBulkLoad COM reference and it is not possible due to this error. Is there any workaround? Or any solution to make SQL table with data like this library?

[toniarnold]

The solution minimal.nuget.core.sln with the minimal.nuget.core.csproj mentioned in toniarnold/aspnettest#2 might be something like "a minimalistic repro project that illustrates the problem."

[pranavkm]

Thanks @toniarnold, reopening for investigation in preview2.