How do I configure logging levels in ASP.NET Core?

How do I configure logging levels in ASP.NET Core?

You can configure logging levels in ASP.NET Core by modifying the appsettings.json file or using code in Startup.cs. Would you like to see an example?

Yes, please show me an example using appsettings.json.

Sure! In your appsettings.json, you can set the logging levels like this:

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  }
}

This configures the default log level to Information, while Microsoft logs will only show warnings.

What if I want to set different levels for different namespaces?

You can specify different log levels for different namespaces by adding them under the LogLevel section. For example:

"LogLevel": {
  "Default": "Information",
  "MyApp.Controllers": "Debug",
  "MyApp.Services": "Error"
}

This way, you can control the verbosity of logs for specific parts of your application.

Can I change logging levels at runtime?

Yes, you can change logging levels at runtime by using the ILoggerFactory and updating the logging configuration. This allows for dynamic adjustments without needing to restart the application.