为什么在Azure上设置ASPNETCORE_ENVIRONMENT变量时需要发布我的project.json

Question

I start a new website, with to default VS2015 template for ASP.NET Core. Just for testing purpose I published It 'as is' on Azure.

I set my ASPNETCORE_ENVIRONMENT to Development on my Azure Website (Paas).

I set the environment variable directly in the Azure Management Portal for my Website as:

But when I do that I get :

So By default ASPNET Core on Azure is set to "Production" Environment. When I leave it that way I don't need my "project.json". But When i Add the ASPNETCORE_ENVIRONMENT I need to publish the project.json file witch is not publish automatically using VS2015 Built-In tools and/or using a linked git repository.

Is there a way to simplify this behavior or do I missed something?

Answer 1

I think the clue is in your stack trace. It's trying to look into project.json to figure out where your user secrets file is, which is only supposed to be used for local development and is enabled in the "Development" environment if using the default template. For my development/testing environments in Azure App Services, I set the Environment to "Staging", which I typically have configured the same as "Development" except for pulling user secrets.

https://docs.microsoft.com/en-us/aspnet/core/security/app-secrets