ChrisForte.Microsoft.Extensions.Logging.Files 8.0.1

Microsoft.Extensions.Logging.Files

File logger provider for Microsoft.Extensions.Logging that allows logging to local files in different formats.

Usage

In the IHostBuilder chained configuration methods, use .AddFile<IFileLoggerBaseFormatter>(configuration, formatter) under IHostBuilder.ConfigureLogging().

IHost host = Host.CreateDefaultBuilder(args)
    .ConfigureLogging((hostBuilderContext, logging) =>
    {
        logging.ClearProviders();
        logging.AddFile<BasicFormatter>(
                        configuration =>
                        {
                            configuration.Directory = @"C:\Logs";
                            configuration.UseRollingFiles = true;
                            configuration.RollingFileTimestampFormat = @"yyyy-MM-dd";
                            configuration.FileExtension = @"log";
                            configuration.FileNamePrefix = @"MyLogFile";
                            configuration.MinimumLogLevel = LogLevel.Debug;
                        },
                        formatter =>
                        {
                            formatter.CaptureScopes = true;
                            formatter.UseUtcTimestamp = true;
                            formatter.IncludePID = true;
                            formatter.IncludeUser = true;
                        })
               .AddFile<CMTraceFormatter>(configuration => { })
               .AddFile<JSONFormatter>(configuration => { });
    })
    .Build();

Use the configuration delegate action to configure the base log file options, and the formatter delegate action to configure automatic formatting and filtering used by the ILogger instance.

Messages are processed and written immediately, and use a message processor and message queue to write to the underlying FileStream.

Extensions

To create your own file logger format, create a class that implements the FileLoggerBaseFormatter class, and override the Write() method defined in IFileLoggerBaseFormatter. Pass that new class as a type parameter in .AddFile<T>()

public abstract void Write<TState>(in LogEntry<TState> logEntry, IExternalScopeProvider scopeProvider, TextWriter textWriter);

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