".NET Core 控制台应用程序和 aspnetcore_environment 变量"

Question

I have a .net core CONSOLE app. In the code I am reading in the appropriate environment specific appsettings.dev.json, appsettings.uat.json etc.

  var environmentName = Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT");
  configuration = new ConfigurationBuilder()
                .SetBasePath(Directory.GetParent(AppContext.BaseDirectory).FullName)
                .AddJsonFile("appsettings.json", false)
                .AddJsonFile($"appsettings.{environmentName}.json", optional: true)
                .AddEnvironmentVariables()
                .Build();

When this is run directly in Visual Studio the ASPNETCORE_ENVIRONMENT variable is set from the launchSettings.json file or from amending the project properties, debug tab and the correct appsettings.environment.json file is read.

When i want to publish the project via Visual Studio ie right click project and publish (ie I do not want to do this via the command line) I select the appropriate .pubxml file held within PublishProfile folder. In this .pubxml file I have set the environmentName.

  <EnvironmentName>dev</EnvironmentName>

However, when running the exe that is produced by the publish process - the environmentName variable specified above is always blank and consequently it doesn't pick up the correct environmentName setting and hence the appropriate appsettings.environment.json file is not read in.

Answer 1

当您想运行已发布的 .exe 文件时，请在命令行（powershell）中尝试这种方式：

$env:ASPNETCORE_ENVIRONMENT="dev";yourfile.exe

Answer 2

I discovered that if I change the actual Machine environment variable (ASPNETCORE_ENVIRONMENT), the deployed application adjust accordingly.