Winform Log4Net使用（一）（产生yyyyMMdd'.log）便于每天使用记录一眼能看出哪天使用时出错

一.在AssemblyInfo.cs文件添加以下内容

或者

[assembly: log4net.Config.XmlConfigurator(Watch = true)]

[assembly: log4net.Config.XmlConfigurator(ConfigFile = "ConfigFile//log4net.config", Watch = true)]

二.新增ConfigFile文件夹，将log4net.config配置文件信息放入

log4net.config 配置信息如下:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="log4net" type="System.Configuration.IgnoreSectionHandler"/>
  </configSections>
  <log4net>
    <!--定义输出到文件中-->
    <appender name="SysAppender" type="log4net.Appender.RollingFileAppender">
      <!--日志的路径-->
      <file value="Logs/" />
      <!--是否覆盖，默认是追加true-->
      <appendToFile value="true"/>
      <rollingStyle value="Composite"/>
      <!--文件名称-->
      <DatePattern value="yyyyMMdd'.log'"></DatePattern>
      <!--设置无限备份=-1 ，最大备份数为1000-->
      <param name="MaxSizeRollBackups" value="100"/>
      <!--每个文件的大小-->
      <param name="MaximumFileSize" value="500KB"/>
      <!--名称是否可以更改 为false为可以更改-->
      <param name="StaticLogFileName" value="false"/>
      <layout type="log4net.Layout.PatternLayout">
        <!--输出格式-->
        <conversionPattern value="%n【记录时间】%date%n【描述】%message%n"/>
      </layout>
    </appender>
    <!--定义输出到控制台命令行中-->
    <appender name="ConsoleAppender" type="log4net.Appender.ConsoleAppender">
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%n【记录时间】%date%n【描述】%message%n"/>
      </layout>
    </appender>
    <!--定义输出到windows事件中-->
    <appender name="EventLogAppender" type="log4net.Appender.EventLogAppender">
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%n＝＝＝＝＝＝＝＝＝＝
%n【日志级别】%-5level
%n【记录时间】%date
%n【线程编号】[%thread]
%n【执行时间】[%r]毫秒
%n【出错文件】%F
%n【出错行号】%L
%n【出错的类】%logger 属性[%property{NDC}]
%n【错误描述】%message
%n【错误详情】%newline"/>
      </layout>
    </appender>
    <!--定义输出到Trace中-->
    <appender name="TraceAppender" type="log4net.Appender.TraceAppender">
      <layout type="log4net.Layout.PatternLayout">
        <!--<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />-->
        <conversionPattern value="%n＝＝＝＝＝＝＝＝＝＝
%n【日志级别】%-5level
%n【记录时间】%date
%n【线程编号】[%thread]
%n【执行时间】[%r]毫秒
%n【出错文件】%F
%n【出错行号】%L
%n【出错的类】%logger 属性[%property{NDC}]
%n【错误描述】%message
%n【错误详情】%newline"/>
      </layout>
    </appender>
    <!--定义日志的输出媒介，下面定义日志以四种方式输出。也可以下面的按照一种类型或其他类型输出。-->
    <root>
      <!--日志的级别 OFF > FATAL > ERROR > WARN > INFO > DEBUG > ALL 只有日志输出级别大于或等于配置的级别才能输出日志信息-->
      <level value="ALL" />
      <!--文件形式记录日志-->
      <appender-ref ref="SysAppender"/>
      <!--控制台控制显示日志-->
      <appender-ref ref="ConsoleAppender"/>
      <!--Windows事件日志-->
      <!--<appender-ref ref="EventLogAppender"/>-->
      <!--TraceAppender日志-->
      <!--<appender-ref ref="TraceAppender"/>-->
    </root>
  </log4net>
</configuration>

三.新增log4NetUtil.CS帮助封装类,代码如下：

 public class log4NetUtil
    {
        #region 变量
        //定义信息的二次处理
        private static event Action<string> OutputMessage;
        //ILog对象
        private static readonly log4net.ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
        #endregion

        #region 定义信息二次处理方式
        private static void HandMessage(object Msg)
        {
            if (OutputMessage != null)
            {
                OutputMessage(Msg.ToString());
            }
        }
        private static void HandMessage(object Msg, Exception ex)
        {
            if (OutputMessage != null)
            {
                OutputMessage(string.Format("{0}:{1}", Msg.ToString(), ex.ToString()));
            }
        }
        private static void HandMessage(string format, params object[] args)
        {
            if (OutputMessage != null)
            {
                OutputMessage(string.Format(format, args));
            }
        }
        #endregion

        #region 封装Log4net
        public static void Debug(object message)
        {
            HandMessage(message);
            if (log.IsDebugEnabled)
            {
                log.Debug(message);
            }
        }
        public static void Debug(object message, Exception ex)
        {
            HandMessage(message, ex);
            if (log.IsDebugEnabled)
            {
                log.Debug(message, ex);
            }
        }
        public static void DebugFormat(string format, params object[] args)
        {
            HandMessage(format, args);
            if (log.IsDebugEnabled)
            {
                log.DebugFormat(format, args);
            }
        }
        public static void Error(object message)
        {
            HandMessage(message);
            if (log.IsErrorEnabled)
            {
                log.Error(message);
            }
        }
        public static void Error(object message, Exception ex)
        {
            HandMessage(message, ex);
            if (log.IsErrorEnabled)
            {
                log.Error(message, ex);
            }
        }
        public static void ErrorFormat(string format, params object[] args)
        {
            HandMessage(format, args);
            if (log.IsErrorEnabled)
            {
                log.ErrorFormat(format, args);
            }
        }
        public static void Fatal(object message)
        {
            HandMessage(message);
            if (log.IsFatalEnabled)
            {
                log.Fatal(message);
            }
        }
        public static void Fatal(object message, Exception ex)
        {
            HandMessage(message, ex);
            if (log.IsFatalEnabled)
            {
                log.Fatal(message, ex);
            }
        }
        public static void FatalFormat(string format, params object[] args)
        {
            HandMessage(format, args);
            if (log.IsFatalEnabled)
            {
                log.FatalFormat(format, args);
            }
        }
        public static void Info(object message)
        {
            HandMessage(message);
            if (log.IsInfoEnabled)
            {
                log.Info(message);
            }
        }
        public static void Info(object message, Exception ex)
        {
            HandMessage(message, ex);
            if (log.IsInfoEnabled)
            {
                log.Info(message, ex);
            }
        }
        public static void InfoFormat(string format, params object[] args)
        {
            HandMessage(format, args);
            if (log.IsInfoEnabled)
            {
                log.InfoFormat(format, args);
            }
        }
        public static void Warn(object message)
        {
            HandMessage(message);
            if (log.IsWarnEnabled)
            {
                log.Warn(message);
            }
        }
        public static void Warn(object message, Exception ex)
        {
            HandMessage(message, ex);
            if (log.IsWarnEnabled)
            {
                log.Warn(message, ex);
            }
        }
        public static void WarnFormat(string format, params object[] args)
        {
            HandMessage(format, args);
            if (log.IsWarnEnabled)
            {
                log.WarnFormat(format, args);
            }
        }
        #endregion
    }