C# 日志

本篇接扫 log4net 基本使用

一、导包

二、配置文件

Log4Net.config

<?xml version="1.0" encoding="utf-8"?>
<configuration>
    <configSections>
        <section name="log4net"
          type="log4net.Config.Log4NetConfigurationSectionHandler,&#xD;&#xA;log4net-net-1.0"/>
    </configSections>
    <log4net>
        <appender name="AppLog" type="log4net.Appender.RollingFileAppender">
            <param name="File" value="SysLog/" />
            <param name="AppendToFile" value="true" />
            <param name="MaxSizeRollBackups" value="-1" />
            <!--最小锁定模型以允许多个进程可以写入同一个文件-->
            <param name="lockingModel"  type="log4net.Appender.FileAppender+MinimalLock" />
            <param name="MaximumFileSize" value="10MB" />
            <param name="RollingStyle" value="Size" />
            <param name="DatePattern" value="yyyy-MM-dd" />
            <param name="StaticLogFileName" value="true" />
            <layout type="log4net.Layout.PatternLayout">
                <param name="ConversionPattern" value="%-5p %d [%c] %m%n" />
            </layout>
        </appender>
        <logger name="AppLog">
            <level value="all" />
            <appender-ref ref="AppLog" />
        </logger>
        <root>
            <level value="all" />
        </root>
    </log4net>
</configuration>

AppLog.cs

using log4net;
using log4net.Appender;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Log4net
{
    public class AppLog
    {
        private static string filepath = AppDomain.CurrentDomain.BaseDirectory + @"\SysLog\";

        private static readonly log4net.ILog logComm = log4net.LogManager.GetLogger("AppLog");

        static AppLog()
        {
            log4net.Config.XmlConfigurator.Configure(new FileInfo("log4net.config"));

            if (!Directory.Exists(filepath))
            {
                Directory.CreateDirectory(filepath);
            }
        }
        public static readonly object o = new object();
        /// <summary>
        /// 写入日志
        /// </summary>
        /// <param name="msg">日志内容</param>
        /// <param name="isWrite">是否写</param>
        /// <param name="action">写日志的方法</param>
        /// <param name="info">日志文件名，便于分开日志文件</param>
        private static void WriteLog(string msg, bool isWrite, Action<object> action, string info = "")
        {
            if (isWrite)
            {
                lock (o)
                {
                    string filename = $"AppLog_{action.Method.Name}_{info}_{ DateTime.Now.ToString("yyyyMMdd_HH")}.log";
                    var repository = LogManager.GetRepository();

                    #region MyRegion
                    var appenders = repository.GetAppenders();
                    if (appenders.Length > 0)
                    {
                        RollingFileAppender targetApder = null;
                        foreach (var Apder in appenders)
                        {
                            if (Apder.Name == "AppLog")
                            {
                                targetApder = Apder as RollingFileAppender;
                                break;
                            }
                        }
                        if (targetApder.Name == "AppLog")//如果是文件输出类型日志，则更改输出路径
                        {
                            if (targetApder != null)
                            {
                                if (!targetApder.File.Contains(filename))
                                {
                                    targetApder.File = @"SysLog\" + filename;
                                    targetApder.ActivateOptions();
                                }
                            }
                        }
                    }
                    #endregion
                    action(msg);
                    //logComm.Error(msg + "\n");
                }
            }
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="msg">日志内容</param>
        /// <param name="info">日志文件名，便于分开日志文件</param>
        /// <param name="isWrite">是否写入</param>
        public static void WriteError(string msg, string info = "", bool isWrite = true)
        {
            WriteLog(msg, isWrite, logComm.Error, info);
        }
        public static void WriteInfo(string msg, string info = "", bool isWrite = true)
        {
            WriteLog(msg, isWrite, logComm.Info, info);
        }
        public static void WriteWarn(string msg, string info = "", bool isWrite = true)
        {
            WriteLog(msg, isWrite, logComm.Warn, info);
        }
        public static void WriteFatal(string msg, string info = "", bool isWrite = true)
        {
            WriteLog(msg, isWrite, logComm.Fatal, info);
        }
    }
}

三、使用

 AppLog.WriteError("用户[张三]：点击了执行了步骤1，发送错误");