Build server	Platform	Build status
AppVeyor	Windows
Travis	Linux / macOS

Logger for .NET Core

Logger for .NET Core Apps that enables logging to different sources

One logger to log them all

Console

If the code that implements the logger uses a console messages can be sent to it

Database

A SQLite database is created to save the records in the path where the assembly is run

File

A file is created every hour to keep small files in the path where the assembly is run

Custom

You can create custom sources to send the messages to a different output of your preference

Configurable

All the provided sources and the ones you may create can be configured to only show specific data according to the needs of your business

How to use with default sources

class Program
{
    // Inject in a service provider
    static void Main(string[] args)
    {
        var serviceCollection = new ServiceCollection();
        ConfigureServices(serviceCollection);

        // Create service provider
        var serviceProvider = serviceCollection.BuildServiceProvider();

        // Run app
        serviceProvider.GetService<Test>().It();
    }

    private void ConfigureServices()
    {
        // Build logger
        ILogger logger = new Logger()
            .AddConsoleSource()
            .AddDatabaseSource()
            .AddFileSource();

        // Add access to generic ILogger
        serviceCollection.AddSingleton(logger);

        // Add the Test class
        serviceCollection.AddTransient<Test>();
    }
}

// Somewhere else in the code

internal class Test
{
    private readonly ILogger logger;

    internal Test(ILogger logger) => this.logger = logger;

    internal void It() => logger.Information("sample");
}

// Call it
var args = new string[] {};
Program.Main(args);

// this should produce an output to a file, database and console and display a message like this
// <INFORMATION> 2019-03-06 23:02:56 [Test::It] sample

How the Log Levels work

// This is the Level enum
public enum Level
{
    Trace = 0,
    Debug = 1,
    Verbose = 2,
    Information = 3,
    Warning = 4,
    Error = 5,
    Critical = 6,
    None = 7
}

public void Test()
{
    var consoleConfiguration = new Configuration
    {
        Level = Level.Trace // Do not ignore any level and log all messages
    };

    var databaseConfiguration = new Configuration
    {
        Level = Level.Warning // Ignore any lower levels and only log messages equal or greater than Warning
    };

    var fileConfiguration = new Configuration
    {
        Level = Level.Critical // Ignore any lower levels and only log Critical messages 
    };

    // Build logger
    ILogger logger = new Logger()
        .AddConsoleSource(consoleConfiguration)
        .AddDatabaseSource(databaseConfiguration)
        .AddFileSource(fileConfiguration);

    logger.Trace("test"); // this will only be sent to the console
    logger.Warning("test"); // this will be sent to the console and the database
    logger.Critical("test"); // this will be sent to the console, the database and the file
}

See the samples

Console application with the 3 default loggers configured