asp.net 核心日志记录不遵循 ConfigurationBuilder 层次结构

Question

I'm trying to configure the log level of an asp.net core application. I have this ConfigurationBuilder set up in my Startup class.

         var builder = new ConfigurationBuilder()
            .SetBasePath(env.ContentRootPath)
            .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
            .AddJsonFile("ConfigFiles/appsettings.configs.json", optional: true, reloadOnChange: true)
            .AddEnvironmentVariables();

        Configuration = builder.Build();

And then in even though I configure the LogLevel in my "ConfigFiles/appsettings.configs.json" file, like this:

  "Logging": {
    "LogLevel": {
      "Default": "Information"
    }
  }

It is simply being ignored. Instead, it is always reading directly from "appsettings.json" (the root file), no matter what. I've even tried to comment out the line of code that configures it, and surprisingly it still reads from there. I know that because I deliberately inserted a bug in the LogLevel configuration, and it throws an error. For the other configuration it works correctly, reading from both files. Looks like "Logging" mechanism statically points to the root appsettings.json file. How do I make it to read from the other file, instead of the root?

Thank you

EDIT: Framework Version: .net Core 3.0

Answer 1

From the docs :

AddJsonFile is automatically called twice when you initialize a new host builder with CreateDefaultBuilder . The method is called to load configuration from:

appsettings.json – This file is read first. The environment version of the file can override the values provided by the appsettings.json file.

appsettings.{Environment}.json – The environment version of the file is loaded based on the IHostingEnvironment.EnvironmentName.

There are two config files appsettings.json and appsettings.Development.json which overrides settings in the base appsettings.json file. And system use it in development mode. You could change the default Loglevel in appsettings.Development.json file .