Windows Store App with Plugin using RuntimeComponent in C++

Unity Engine
,
1

Hi,

We created an example project to test a plugin, but we have some errors.

The library is a test, it only returns a double value. It contains three projects:

  • Stub for Unity
  • RuntimeComponent in C++
  • Windows Store Library that uses the RuntimeComponent

First of all, if we create the build in Unity, appears the following error:

Error building Player: Exception: Failed to run Reference Rewriter with cmdline --target=“Temp/StagingArea\CS_Library.dll” --framework=“C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETCore\v4.5” --platform=“C:\Program Files (x86)\Windows Kits\8.0\References\CommonConfiguration\Neutral\Windows.winmd” --support=“Temp/StagingArea\WinRTLegacy.dll” --system=System --dbg=pdb --alt=System.Xml.Serialization --ignore=System.IConvertible,mscorlib.[Temp/StagingArea\CS_Library.dll]
Catastrophic failure while running rrw: Mono.Cecil.AssemblyResolutionException: Failed to resolve assembly: ‘WinRT_CPP, Version=255.255.255.255, Culture=neutral, PublicKeyToken=null’

So, we put the dll in the unprocessed plugins list in PlayerSettings. Also, using [DllImport(“CS_Library”)] apparently solves this issue.

But the big problem occurs when we execute the project in Visual Studio:

1059×237 26.9 KB

The RuntimeComponent can’t be loaded.

Had someone the same error? Please, share with us how you solved this.

Thanks.

2

Could you create a bug with small repro attached, this scenario should work as far as I know.

You could also check if plugin is added to References section in generated solution.

3

Thanks to answer!

If we try to add the WinRT_CPP.dll appears this:

There is the RuntimeComponent: Dropbox - Error - Simplify your life
It has the output folders with the dll’s.

And there is the Unity project: Dropbox - Error - Simplify your life

4

if it’s a c++ winrt component, you need to add winmd file, not dll file.

5

There’s also seems to be a problem with this code:

public double Function()
{
this.rc = new RuntimeComponent();
IList<double> result = this.rc.ComputeResult(6.0);
return result.GetEnumerator().Current;
}

I am getting
A first chance exception of type ‘System.InvalidOperationException’ occurred in mscorlib.dll

I tried to call this function from App.xaml.cs, but I get same issue there, something is wrong with this implementation, but I am not sure what, try changing
return result.GetEnumerator().Current;

to

return result[0];

P.S in the future please use this section for Windows Store Apps - Unity Engine - Unity Discussions

Cheers

6

The C# code needs:
result.GetEnumerator().MoveNext();
That’s the error.

There is a problem with the winmd, it isn’t resolved:

Could you upload your project? We think there are some things that need to be active or similar, and we don’t know which are.

7

Oh by the way, are you using Visual Studio 2013 Update 4, because there’s a known bug, that it incorrectly adds WinRT C++ components to AppXManifest file

8

Here’s the exported project without Players folder - https://oc.unity3d.com/public.php?service=files&t=86e867e1008360a6054bfbc5af64710d.

Here’s what I did:

  • Opened project with Unity 4.6.1f1
  • Fixed error in plugin “return result.GetEnumerator().Current;”
  • Built to Windows Store Apps SDK 8.0
  • Opened exported Visual Studio solution
  • Build & Run
9

Oh, we don’t know this bug… We have the version 12.0.21005.1 REL. How we know if we have the update?

Which version of visual studio we need?

Thanks a lot for your help.

10

That version should be fine - it’s not affected.

Did you try building the application? I wouldn’t mind the exclamation marks in the references window - chance are they will go away once you run the application.