C#log4net日誌

首先在項目中添加NuGet包

在AssemblyInfo.cs文件中添加[assembly: log4net.Config.XmlConfigurator(ConfigFile = "Log4net.config", ConfigFileExtension = "config", Watch = true)]

在bin\Debug目錄下會看到有log4net的兩個文件，然後需要創建一個log4net的配置文件，可以創建個文本文檔後另存爲所有文件.config獲得

用文本文檔打開配置文件輸入

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="log4net" type="System.Configuration.IgnoreSectionHandler"/>
  </configSections>
  <log4net>
    <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
      <file value="Logging\logfile.log"/>
      <appendToFile value="true"/>
      <rollingStyle value="Composite"/>
      <datePattern value="yyyyMMdd"/>
      <maxSizeRollBackups value="10"/>
      <maximumFileSize value="50MB"/>
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date [%thread] %-5level - %message%newline"/>
      </layout>
    </appender>
    <root>
      <level value="All"/>
      <appender-ref ref="RollingLogFileAppender"/>
    </root>
  </log4net>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2"/>
  </startup>
</configuration>

最後再創建一個AppLog.cs的類

using log4net;
using log4net.Config;
using System;
using System.IO;
using System.Windows.Forms;

namespace DLPrinter.Common {
    public class AppLog {
        private static readonly ILog log;
        static AppLog() {
            XmlConfigurator.ConfigureAndWatch(new FileInfo(AppDomain.CurrentDomain.SetupInformation.ConfigurationFile));
            log = LogManager.GetLogger(typeof(AppLog));
            
        }
        public static void Debug(object message) {
            log.Debug(message);
        }
        public static void DebugFormatted(string format, params object[] args) {
            log.DebugFormat(format, args);
        }
        public static void Info(object message) {
            log.Info(message);
        }
        public static void InfoFormatted(string format, params object[] args) {
            log.InfoFormat(format, args);
        }
        public static void Warn(object message) {
            log.Warn(message);
        }
        public static void Warn(object message, Exception exception) {
            log.Warn(message, exception);
        }
        public static void WarnFormatted(string format, params object[] args) {
            log.WarnFormat(format, args);
        }
        public static void Error(object message) {
            log.Error(message);
        }
        public static void Error(object message, Exception exception) {
            log.Error(message, exception);
        }
        public static void ErrorFormatted(string format, params object[] args) {
            log.ErrorFormat(format, args);
        }
        public static void Fatal(object message) {
            log.Fatal(message);
        }
        public static void Fatal(object message, Exception exception) {
            log.Fatal(message, exception);
        }
        public static void FatalFormatted(string format, params object[] args) {
            log.FatalFormat(format, args);
        }
    }
}

 

在其他代碼中想在日誌輸出就可以直接調用AppLog.Debug("");