简单配置log4Net记录系统日志

这里简单介绍关于如何使用log4Net来开速配置日志记录

首先要引用log4net.dll，

然后配置，这里采用的是直接在Web.config文件中配置，configSections这个节点一定一定要放在configuration下面的第一个位置

<configSections>
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net"/>
  </configSections>
  
  <log4net>
    <logger name="log4NetTest">
      <level value="INFO"/>
      <!--<appender-ref ref="AdoNetAppender_SqlServer"/>-->
      <!--<appender-ref ref="LogFileAppender"></appender-ref>-->
      <appender-ref ref="RollingLogFileAppender"></appender-ref>
    </logger>
    <appender name="LogFileAppender" type="log4net.Appender.FileAppender">
      <param name="File" value="Application.log.txt"/>
      <param name="DatePattern" value="MM-dd HH:mm"/>
      <param name="AppendToFile" value="true"/>
      <layout type="log4net.Layout.PatternLayout">
        <param name="ConversionPattern" value="%d [%t] %-5p %c [%x] - %m%n"/>
      </layout>
    </appender>
    <appender name="AdoNetAppender_SqlServer" type="log4net.Appender.AdoNetAppender">
      <bufferSize value="1"/>
      <connectionType value="System.Data.SqlClient.SqlConnection, System.Data, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
      <connectionString value="data source=(local);initial catalog=pubs;integrated security=false;persist security info=True;User ID=sa;Password=sa"/>
      <commandText value="INSERT INTO [Log4Net]([Text]) Values( @Description)"/>
      <parameter>
        <parameterName value="@Description"/>
        <dbType value="String"/>
        <size value="1000"/>
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%X{description}"/>
        </layout>
      </parameter>
    </appender>
    <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
      <param name="File" value="bin/log/log4NetFile.txt"/>
      <param name="AppendToFile" value="true"/>
      <param name="MaxSizeRollBackups" value="10"/>
      <param name="MaximumFileSize" value="5MB"/>
      <param name="RollingStyle" value="Size"/>
      <param name="StaticLogFileName" value="true"/>
      <layout type="log4net.Layout.PatternLayout">
        <param name="ConversionPattern" value="%d [%t] %-5p %c [%x] - Line:%L %m%n"/>
      </layout>
    </appender>
  </log4net>

 关于ConversionPattern相关符号的配置

%m(message):输出的日志消息，如ILog.Debug(…)输出的一条消息
%n(new line)：換行
%d(datetime):输出当前语句运行的时刻 
%r(run time):输出程序从运行到执行到当前语句时消耗的毫秒数 
%t(thread id):当前语句所在的线程ID
%p(priority): 日志的当前优先级别，即DEBUG、INFO、WARN…等
%c(class):当前日志对象的名称
%L：输出语句所在的行号
%F：输出语句所在的文件名
%-数字：表示该项的最小长度，如果不够，则用空格填充

然后可以写一个简单的LogHelper日志帮助类

 

 /// <summary>
    /// 日志帮助类
    /// </summary>
    class LogHelper
    {
        /// <summary>
        /// lock对象
        /// </summary>
        private static object lockLog = new object();

        private static ILog _log;
        /// <summary>
        /// 记录Log信息
        /// </summary>
        public static ILog ToLog
        {
            get
            {
                if (_log == null)
                {
                    lock (lockLog)
                    {
                        log4net.Config.XmlConfigurator.Configure();
                        _log = log4net.LogManager.GetLogger("log4NetTest");
                    }
                }
                return _log;
            }
        }
    }

    /// <summary>
    /// Log对外执行文件
    /// </summary>
    public class Log
    {
        /// <summary>
        /// 记录Error日志
        /// </summary>
        /// <param name="msg"></param>
        public static void Error(string msg)
        {
            LogHelper.ToLog.Error(msg);
        }
        /// <summary>
        /// 记录Warn日志
        /// </summary>
        /// <param name="msg"></param>
        public static void Warn(string msg)
        {
            LogHelper.ToLog.Warn(msg);
        }
        /// <summary>
        /// 记录Info日志
        /// </summary>
        /// <param name="msg"></param>
        public static void Info(string msg)
        {
            LogHelper.ToLog.Info(msg);
        }
        /// <summary>
        /// 记录Debug日志
        /// </summary>
        /// <param name="msg"></param>
        public static void Debug(string msg)
        {
            LogHelper.ToLog.Debug(msg);
        }
    }

 最后就是在你需要的位置直接调用就行了

 

try
            {
                Log.Info("日志已经记录");
            }
            catch (Exception ex)
            {
                Log.Error("日志错误已经记录：" + ex);
            }