appsettings.json and environments

[xperiandri]

How can I use different complementary appsettings.{environment}.json for different environments

Now what I do is

        var builder = this.CreateBuilder(args)
            .Configure(host => host
#if DEBUG
                // Switch to Development environment when running in DEBUG
                .UseEnvironment(Environments.Development)
                //.UseEnvironment(Environments.Development + "Local")
#endif
                .UseThemeSwitching()
                .UseConfiguration(configure: configBuilder =>
                    configBuilder
                        .EmbeddedSource<App>()
                        .Section<ServerOptions>(ServerOptions.SectionName))

However, I want the app to work with production, staging, and development environments.
Is it possible to achieve this without using custom platforms with custom compile-time variables and rebuilding app using conditional compilation?

[jeromelaban]

Thanks for the question. You can always read the browser's address bar parameters, or using the OnLaunched parameters to change the current environment.

[xperiandri]

Do you mean launching with a commanline switch?

[AuderixDev]

@xperiandri
The environment in appsettings.{environment}.jsoncomes from the EnvironmentVariable ASPNETCORE_ENVIRONMENT.

For local development we created different launchSettings (in Properties > launchSettings.json)

 "Development": {
...
     "environmentVariables": {
         "ASPNETCORE_ENVIRONMENT": "Development"
     },
     "applicationUrl": "https://localhost:5000",
...
 },
  "Test": {
...
     "environmentVariables": {
         "ASPNETCORE_ENVIRONMENT": "TestStage"
     },
     "applicationUrl": "https://testapplication.com",
     "commandLineArgs": "-l"
...
 },

This ASPNETCORE_ENVIRONMENT can also be set from outside. e.g. on the system environment variables, or at your CI, or in the azure environmentvariables.

[xperiandri]

Have you tested that it works?
In VS `launchsettings.jeon’ it does not work

[AuderixDev]

Yes, it works for us. We use it for two different developments (local development + Azure testing).
But maybe your problem is that WASM can't access enviroment variables.
For WASM we read the browser's address.

[xperiandri]

I use WinUI and other non WASM