Net常用的一些开源日志库

using Serilog;
using Serilog.Formatting.Json;
class Program
{
    static void Main(string[] args)
    {
        // 配置 Serilog
        var loggerConfig = new LoggerConfiguration()
            .WriteTo.Console(new JsonFormatter())
            .WriteTo.File("log.txt", rollingInterval: RollingInterval.Day);
        // 创建日志实例
        var logger = loggerConfig.CreateLogger();
        // 记录日志
        logger.Information("这是一条Info级别的日志信息");
        logger.Debug("这是一条Debug级别的日志信息");
    }
}

public class LogHelper
{
    static Logger logger = GetLogger();
    static Logger GetLogger()
    {
        if (logger == null)
        {
            // 配置 Serilog
            var loggerConfig = new LoggerConfiguration()
                .WriteTo.File(CommonPath.LogFile, rollingInterval: RollingInterval.Day);
            // 创建日志实例
            logger = loggerConfig.CreateLogger();
        }
        return logger;
    }
    public static string CmdName = "";
    public static void Info(string message)
    {
        if (!string.IsNullOrWhiteSpace(CmdName))
        {
            logger.Information($"{CmdName}: {message}");
        }
        else
        {
            logger.Information($"{message}");
        }
    }
    public static void Warn(string message)
    {
        if (!string.IsNullOrWhiteSpace(CmdName))
        {
            logger.Warning($"{CmdName}: {message}");
        }
        else
        {
            logger.Warning($"{message}");
        }
    }
    public static void Error(string message)
    {
        if (!string.IsNullOrWhiteSpace(CmdName))
        {
            logger.Error($"{CmdName}: {message}");
        }
        else
        {
            logger.Error($"{message}");
        }
    }
}

using NLog;
using NLog.Config;
using NLog.Targets;
class Program
{
    private static Logger logger = LogManager.GetCurrentClassLogger();
    static void Main(string[] args)
    {
        // 配置 NLog
        var config = new LoggingConfiguration();
        // 添加控制台目标
        var consoleTarget = new ConsoleTarget();
        config.AddTarget("console", consoleTarget);
        // 添加文件目标
        var fileTarget = new FileTarget();
        config.AddTarget("file", fileTarget);
        // 设置日志级别
        config.LoggingRules.Add(new LoggingRule("*", LogLevel.Info, consoleTarget));
        config.LoggingRules.Add(new LoggingRule("*", LogLevel.Info, fileTarget));
        // 应用配置
        LogManager.Configuration = config;
        // 记录日志
        logger.Info("这是一条Info级别的日志信息");
        logger.Debug("这是一条Debug级别的日志信息");
    }
}

public class Log4NetHelper
{
    private static ILog sLogger = null;
    private readonly static ILog Logger = sLogger ?? (sLogger = InitILog());

    private static ILog InitILog()
    {
        string dir = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
        string file = Path.Combine(dir, "log4net.config");
        FileInfo info = new FileInfo(file);
        XmlConfigurator.Configure(info);

        var repository = LogManager.GetRepository();
        var appenders = repository.GetAppenders();

        if (appenders.Length != 0)
        {
            var targetApder = appenders.First(p => p.Name == "RollingLogFileAppender") as RollingFileAppender;
            //targetApder.File = Path.Combine(dir, "Log\\");
            targetApder.File = CommonPath.GetLogsDir();
            targetApder.ActivateOptions();
        }

        return LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
    }

    public static void Info(string info)
    {
        Logger.Info(info);
    }

    public static void Error(string error)
    {
        Logger.Error(error);
    }

    public static void Warning(string warning)
    {
        Logger.Warn(warning);
    }
}