Serilog ILogger to Microsoft ILogger?

Question

I am usually using injection with Serilog and ILogger but in this case I hade to create my own ILogger like this :

private static readonly ILogger _logger = Serilog.Log.ForContext<MyClass>() as ILogger;

I do however need a Microsoft ILogger instead, is there any way to create a Microsoft ILogger from Serilog or to convert a existing Serilog ILogger to Microsoft ILogger?

Edit 1: To be clear, the project is a .net microservice that use "IHostBuilder.UseSerilog" to feed the injection of Microsoft ILogger to classes. In this specific case I can however not have a ILogger injected, this would create a circular relation. So to solve this I have to manually create it within the context(example above).

The problem is that this creates a Serilog ILogger while the method I need to use takes a Microsoft ILogger.

So either I need to convert the Serilog ILogger to a Microsoft ILogger or even better, get Serilog to create a Microsoft ILogger.

Actually, best would be if I could avoid adding more Serilog stuff into the code, it makes it harder if the log system later need to be switched.

Edit 2:

I have tried this :

var logger1 = Serilog.Log.ForContext<MessageQueueSink>() as Serilog.ILogger;

            logger1.Information("test1");

            var loggerFactorytest = new LoggerFactory()
                .AddSerilog(logger1);

            var logger2 = loggerFactory.CreateLogger("Logger");

            logger2.LogInformation("test2");

The first "test1" is shown in the output but the "test2" is not. its now leaning more and more toward excluding logging from this part of the code.

Does this answer your question? [Use Serilog with Microsoft.Extensions.Logging.ILogger](https://stackoverflow.com/questions/61544047/use-serilog-with-microsoft-extensions-logging-ilogger) — Glen Thomas, Mar 04 '22 at 11:20
@GlenThomas, not not really, Im already using Serilog injections with Microsofts ILogger in my application. But in this part I can´t use the injection but I still need to use the serilog and its configuration for the application and its context. The _logger in my example are working great, I get the log data the same way as if it would be injected. The problem is however that I need to use methods that only take Microsoft ILogger so If I could create a Microsoft ILogger from Serilog or convert it would solve the problem easy. I dont get the downvote? What is the problem with the question? — Banshee, Mar 04 '22 at 13:37

score 1 · Accepted Answer · answered Mar 08 '22 at 10:43

I did not find a way to get a MS ILogger from Serilog or translate a Serilog ILogger to a MS ILogger so instead I created a custom MS ILogger that wrapped a Serilog ILogger like this :

public class CustomSerilogger : Microsoft.Extensions.Logging.ILogger
    {
        private readonly ILogger _logger;
        public CustomSerilogger(ILogger logger)
        { _logger = logger; }

        public IDisposable BeginScope<TState>(TState state) => default!;

        public bool IsEnabled(Microsoft.Extensions.Logging.LogLevel logLevel) { return _logger.IsEnabled(LogLevelToLogEventLevel(logLevel)); }

        public void Log<TState>(Microsoft.Extensions.Logging.LogLevel logLevel, Microsoft.Extensions.Logging.EventId eventId, TState state, Exception exception, Func<TState, Exception, string> formatter)
        {
            if (!IsEnabled(logLevel))
                return;

            _logger.Write(LogLevelToLogEventLevel(logLevel), exception, state.ToString());
        }

        private LogEventLevel LogLevelToLogEventLevel(Microsoft.Extensions.Logging.LogLevel loglevel)
        {
            switch(loglevel)
            {
                case Microsoft.Extensions.Logging.LogLevel.Debug:
                    return LogEventLevel.Debug;
                case Microsoft.Extensions.Logging.LogLevel.Information:
                    return LogEventLevel.Information;
                case Microsoft.Extensions.Logging.LogLevel.Warning:
                    return LogEventLevel.Warning;
                case Microsoft.Extensions.Logging.LogLevel.Error:
                    return LogEventLevel.Error;
                case Microsoft.Extensions.Logging.LogLevel.Critical:
                    return LogEventLevel.Fatal;
                case Microsoft.Extensions.Logging.LogLevel.None:
                    return LogEventLevel.Verbose;
                case Microsoft.Extensions.Logging.LogLevel.Trace:
                    return LogEventLevel.Verbose;
            }
            return LogEventLevel.Verbose;
        }
    }

Serilog ILogger to Microsoft ILogger?

1 Answers1