C#之MVC中使用Log4Net

1 下载log4net.dllweb

2 在web.config 中的 <configSections>节点内增长以下代码app

<!--log4net_s-->
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net" />
<!--log4net_e-->

3 新增Config文件夹并增长log4net.config文件具体配置能够自定义示例内容以下：spa

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net"/>
  </configSections>
  <log4net debug="false">
    <!--错误日志配置-->
    <appender name="ErrorAppender" type="log4net.Appender.RollingFileAppender">
      <param name="File" value="D:\\MyWebLog\\LogError\\" />
      <param name="AppendToFile" value="true" />
      <param name="MaxSizeRollBackups" value="100" />
      <param name="MaxFileSize" value="10240" />
      <param name="StaticLogFileName" value="false" />
      <param name="DatePattern" value="yyyyMMdd&quot;.txt&quot;" />
      <param name="RollingStyle" value="Date" />
      <layout type="log4net.Layout.PatternLayout">
        <param name="ConversionPattern" value="%n%d-------------------%n%m%n" />
      </layout>
    </appender>

    <!--信息日志配置-->
    <appender name="InfoAppender" type="log4net.Appender.RollingFileAppender">
      <param name="File" value="D:\\MyWebLog\\LogInfo\\" />
      <param name="AppendToFile" value="true" />
      <param name="MaxFileSize" value="10240" />
      <param name="MaxSizeRollBackups" value="100" />
      <param name="StaticLogFileName" value="false" />
      <param name="DatePattern" value="yyyyMMdd&quot;.txt&quot;" />
      <param name="RollingStyle" value="Date" />
      <layout type="log4net.Layout.PatternLayout">
        <param name="ConversionPattern" value="%n%d-------------------%n%m%n" />
      </layout>
    </appender>

    <!--Debug日志配置-->
    <appender name="DebugAppender" type="log4net.Appender.RollingFileAppender">
      <param name="File" value="D:\\MyWebLog\\LogDebug\\" />
      <param name="AppendToFile" value="true" />
      <param name="MaxFileSize" value="10240" />
      <param name="MaxSizeRollBackups" value="100" />
      <param name="StaticLogFileName" value="false" />
      <param name="DatePattern" value="yyyyMMdd&quot;.txt&quot;" />
      <param name="RollingStyle" value="Date" />
      <layout type="log4net.Layout.PatternLayout">
        <param name="ConversionPattern" value="%d,%m%n" />
      </layout>
    </appender>

    <!--严重错误日志配置-->
    <appender name="FataAppender" type="log4net.Appender.RollingFileAppender">
      <param name="File" value="D:\\MyWebLog\\LogFata\\" />
      <param name="AppendToFile" value="true" />
      <param name="MaxFileSize" value="10240" />
      <param name="MaxSizeRollBackups" value="100" />
      <param name="StaticLogFileName" value="false" />
      <param name="DatePattern" value="yyyyMMdd&quot;.txt&quot;" />
      <param name="RollingStyle" value="Date" />
      <layout type="log4net.Layout.PatternLayout">
        <param name="ConversionPattern" value="%d,%m%n" />
      </layout>
    </appender>

    <!--警告日志配置-->
    <appender name="WarnAppender" type="log4net.Appender.RollingFileAppender">
      <param name="File" value="D:\\MyWebLog\\LogWarn\\" />
      <param name="AppendToFile" value="true" />
      <param name="MaxFileSize" value="10240" />
      <param name="MaxSizeRollBackups" value="100" />
      <param name="StaticLogFileName" value="false" />
      <param name="DatePattern" value="yyyyMMdd&quot;.txt&quot;" />
      <param name="RollingStyle" value="Date" />
      <layout type="log4net.Layout.PatternLayout">
        <param name="ConversionPattern" value="%d,%m%n" />
      </layout>
    </appender>
    <!--log4net.LogManager.GetLogger("logerror")用这个来选择这种类型-->
    <logger name="logerror">
      <level value="ERROR" />
      <appender-ref ref="ErrorAppender" />
    </logger>
    <logger name="loginfo">
      <level value="INFO" />
      <appender-ref ref="InfoAppender" />
    </logger>
    <logger name="logdebug">
      <level value="DEBUG" />
      <appender-ref ref="DebugAppender" />
    </logger>
    <logger name="logwarn">
      <level value="WARN" />
      <appender-ref ref="WarnAppender" />
    </logger>
    <logger name="logfata">
      <level value="FATA" />
      <appender-ref ref="FataAppender" />
    </logger>

  </log4net>
</configuration>

4 添加一个Log4NetHelper类库文件内容以下：debug

public static class Log4NetHelper { private static string _debugAppender = "logdebug"; private static string _errorAppender = "logerror"; private static string _fatalAppender = "logfata"; private static string _infoAppender = "loginfo"; private static string _warnAppender = "logwarn"; #region 属性设置 /// <summary>
        /// 设置DebugAppender的值，默认为：logdebug
        /// </summary>
        public static string DebugAppender { set { _debugAppender = value; } } /// <summary>
        /// 设置ErrorAppender的值，默认为：logerror
        /// </summary>
        public static string ErrorAppender { set { _errorAppender = value; } } /// <summary>
        /// 设置FatalAppender的值，默认为：logfata
        /// </summary>
        public static string FatalAppender { set { _fatalAppender = value; } } /// <summary>
        /// 设置InfoAppender的值，默认为：loginfo
        /// </summary>
        public static string InfoAppender { set { _infoAppender = value; } } /// <summary>
        /// 设置WarnAppender的值，默认为：logwarn
        /// </summary>
        public static string WarnAppender { set { _warnAppender = value; } } #endregion /// <summary>
        /// 加载log4net的日志配置文件
        /// </summary>
        /// <param name="configFilePath">日志配置文件的完整路径</param>
        public static void LoadConfig(string configFilePath) { if (string.IsNullOrEmpty(configFilePath) || !File.Exists(configFilePath)) { throw new ArgumentNullException("日志配置文件不存在"); } XmlConfigurator.ConfigureAndWatch(new FileInfo(configFilePath)); } /// <summary>
        /// 根据指定的日志适配器名称获取日志对象
        /// </summary>
        /// <param name="appenderName">日志适配器名称</param>
        /// <returns>日志对象</returns>
        private static ILog GetLogByName(string appenderName) { if (string.IsNullOrEmpty(appenderName)) { throw new ArgumentNullException("日志配置名称不能为空"); } return LogManager.GetLogger(appenderName); } /// <summary>
        /// 记录调试日志
        /// </summary>
        /// <param name="message">日志信息，若是因异常记录日志，则message能够为null</param>
        public static void Debug(string message) { ILog logByName = GetLogByName(_debugAppender); if (logByName.IsDebugEnabled) { logByName.Debug(message); } } /// <summary>
        /// 记录调试日志
        /// </summary>
        /// <param name="message">日志信息，若是因异常记录日志，则message能够为null</param>
        /// <param name="exception">为日志附加异常信息，能够在配置中获取更准确的信息，如无异常信息，则能够为null</param>
        public static void Debug(string message, Exception exception) { ILog logByName = GetLogByName(_debugAppender); if (logByName.IsDebugEnabled) { logByName.Debug(message, exception); } } /// <summary>
        /// 记录错误日志
        /// </summary>
        /// <param name="message">日志信息，若是因异常记录日志，则message能够为null</param>
        public static void Error(string message) { ILog logByName = GetLogByName(_errorAppender); if (logByName.IsErrorEnabled) { logByName.Error(message); } } /// <summary>
        /// 记录错误日志
        /// </summary>
        /// <param name="message">日志信息，若是因异常记录日志，则message能够为null</param>
        /// <param name="exception">为日志附加异常信息，能够在配置中获取更准确的信息，如无异常信息，则能够为null</param>
        public static void Error(string message, Exception exception) { ILog logByName = GetLogByName(_errorAppender); if (logByName.IsErrorEnabled) { logByName.Error(message, exception); } } /// <summary>
        /// 记录严重错误日志
        /// </summary>
        /// <param name="message">日志信息，若是因异常记录日志，则message能够为null</param>
        public static void Fatal(string message) { ILog logByName = GetLogByName(_fatalAppender); if (logByName.IsFatalEnabled) { logByName.Fatal(message); } } /// <summary>
        /// 记录严重错误日志
        /// </summary>
        /// <param name="message">日志信息，若是因异常记录日志，则message能够为null</param>
        /// <param name="exception">为日志附加异常信息，能够在配置中获取更准确的信息，如无异常信息，则能够为null</param>
        public static void Fatal(string message, Exception exception) { ILog logByName = GetLogByName(_fatalAppender); if (logByName.IsFatalEnabled) { logByName.Fatal(message, exception); } } /// <summary>
        /// 记录信息日志
        /// </summary>
        /// <param name="message">日志信息，若是因异常记录日志，则message能够为null</param>
        public static void Info(string message) { ILog logByName = GetLogByName(_infoAppender); if (logByName.IsInfoEnabled) { logByName.Info(message); } } /// <summary>
        /// 记录信息日志
        /// </summary>
        /// <param name="message">日志信息，若是因异常记录日志，则message能够为null</param>
        /// <param name="exception">为日志附加异常信息，能够在配置中获取更准确的信息，如无异常信息，则能够为null</param>
        public static void Info(string message, Exception exception) { ILog logByName = GetLogByName(_infoAppender); if (logByName.IsInfoEnabled) { logByName.Info(message, exception); } } /// <summary>
        /// 记录警告日志
        /// </summary>
        /// <param name="message">日志信息，若是因异常记录日志，则message能够为null</param>
        public static void Warn(string message) { ILog logByName = GetLogByName(_warnAppender); if (logByName.IsWarnEnabled) { logByName.Warn(message); } } /// <summary>
        /// 记录警告日志
        /// </summary>
        /// <param name="message">日志信息，若是因异常记录日志，则message能够为null</param>
        /// <param name="exception">为日志附加异常信息，能够在配置中获取更准确的信息，如无异常信息，则能够为null</param>
        public static void Warn(string message, Exception exception) { ILog logByName = GetLogByName(_warnAppender); if (logByName.IsWarnEnabled) { logByName.Warn(message, exception); } } }

5 在global.asax.cs 的Application_Start方法增长以下代码调试

//读取log4net的配置文件日志

Log4NetHelper.LoadConfig(AppDomain.CurrentDomain.BaseDirectory + "Config\\Log4net.config");

6 控制器action方法调用示例code

Log4NetHelper.Error("abc"); Log4NetHelper.Info("abc"); Log4NetHelper.Fatal("abc"); Log4NetHelper.Debug("abc"); Log4NetHelper.Warn("abc");