C# 使用log4net写日记

一 导入LOG4NET

打开VS2012 工具》》库程序包管理器》》管理解决方案的NuGet程序包，搜索LOG4NET，如下图

二 添加配置文件log4net.config

在配置文件中添加一下代码

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <system.web>

  </system.web>
  <configSections>
    <section name="log4net" type="System.Configuration.IgnoreSectionHandler"/>
  </configSections>
  <log4net>
    <logger name="logerror">
      <level value="ERROR" />
      <appender-ref ref="ErrorAppender" />
    </logger>
    <logger name="loginfo">
      <level value="INFO" />
      <appender-ref ref="InfoAppender" />
    </logger>
    <appender name="ErrorAppender" type="log4net.Appender.RollingFileAppender">
      <param name="File" value="Log\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异常时间：%d %n异常级别：%-5p%n异常内容：%m%n" />
      </layout>
    </appender>
    <appender name="InfoAppender" type="log4net.Appender.RollingFileAppender">
      <param name="File" value="Log\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="日志时间：%d %n日志级别：%-5p  %n日志内容：%m%n%n" />
      </layout>
    </appender>
  </log4net>

</configuration>

三 添加Log4netHelper类

插入代码

using log4net;

//
///

public class Log4netHelper
    {
        private static readonly ILog loginfo = LogManager.GetLogger("loginfo");

        private static readonly ILog logerror = LogManager.GetLogger("logerror");
        /// <summary>
        /// 记录错误日志
        /// </summary>
        /// <param name="info"></param>
        /// <param name="ex"></param>
        public static void WriteErrorLog(string info, Exception ex)
        {
            if (logerror.IsErrorEnabled)
            {
                logerror.Error(info, ex);
            }
        }
        /// <summary>
        /// 记录一般信息
        /// </summary>
        /// <param name="info"></param>
        public static void WriteInfoLog(string info)
        {
            if (loginfo.IsInfoEnabled)
            {
                loginfo.Info(info);
            }
        }

    }

四 调用Log4netHelper 的函数

........
.......

try{
    
}
catch (Exception ex)
                    {
                        Log4netHelper.WriteErrorLog("测试", ex);
                    }

 最后一点要添加以下代码

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

可以在AssemblyInfo.cs类中添加或在初始化程序中添加