UWP run Exe file with Parameters

Question

on UWP, I want to run a Exe file with parameter. Here is an example.

process.exe filename.txt

this Command line application process the text file and output a result file as Text.

My Question is

How to pass the parameter. I success to run Exe file on UWP, but the input full path for filename maybe wrong and failed.

in ViewModels,

await FullTrustProcessLauncher.LaunchFullTrustProcessForCurrentAppAsync("spectrum");

in Package.appxmanifest

  <Extensions>
    <desktop:Extension Category="windows.fullTrustProcess" Executable="Assets\identify\process.exe" >
      <desktop:FullTrustProcess>
        <desktop:ParameterGroup GroupId="spectrum" Parameters="Assets\Identify\filename.txt"/>
      </desktop:FullTrustProcess>
    </desktop:Extension>
  </Extensions>
...
<Capabilities>
<rescap:Capability Name="runFullTrust" />
</DeviceCapability>

Now, I put a file on Assets\identify folder. it is same folder with exe file. but Exefile can not find the input file.

How should I write in "desktop:ParameterGroup...." ??

Is there anyway to pass Argument in programmatically ? Honestly, I do not want to write argement in Package.appxmanifest.

Update 1: I tried this too. but can not find the filename.

        <desktop:ParameterGroup GroupId="spectrum" Parameters=".\Assets\Identify\filename.txt"/>

Update 2

my external application show this error :

This mean, My external applicaiton received strange string as input argument. "*/InvokerPRAID : App Appx/identify/souma.spe"

What is /InvokerPRAID : App ??

Answer 1

If you want to pass the parameter to the arguments of the Win32 application, the value is in the third argument.

UWP Package Manifest:

<desktop:ParameterGroup GroupId="spectrum" Parameters=".\Assets\Identify\filename.txt"/>

Win 32 Application

static void Main(string[] args)
{
   //args[0] = "/InvokerPRAID :"
   //args[1] = "App"
   var fullTrustProcessParam = args[2]; //".\Assets\Identify\filename.txt"
}