Log4Net配置使用简记
1,引用Log4Net.dll 。当前为2.0.8.0版,可添加Nuget包。我的办法是从下载的包中直接引用相应.net版本的dll以减小项目体积
2,在App.config中增加<section>节和<log4net>节。注意一个配置文件最多只能有一个configSections节,如果有必须是第一个节点
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
<?xml version="1.0" encoding="utf-8" ?> <configuration> <configSections> <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" /> </configSections> <startup> <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" /> </startup> <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".txt"" /> <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> <!--< > = <> %n = 回车--> </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".txt"" /> <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>
3,项目AssemblyInfo.cs文件中增加一行代码,指明从配置文件中读取配置
[assembly: log4net.Config.XmlConfigurator(ConfigFileExtension = "config", Watch = true)]
4,项目中添加日志类
public class LogHelper
{
private LogHelper()
{
}
public static readonly log4net.ILog loginfo = log4net.LogManager.GetLogger("loginfo");
public static readonly log4net.ILog logerror = log4net.LogManager.GetLogger("logerror");
public static void SetConfig()
{
log4net.Config.XmlConfigurator.Configure();
}
public static void SetConfig(FileInfo configFile)
{
log4net.Config.XmlConfigurator.Configure(configFile);
}
public static void WriteLog(string info)
{
if (loginfo.IsInfoEnabled)
{
loginfo.Info(info);
}
}
public static void WriteLog(string info, Exception se)
{
if (logerror.IsErrorEnabled)
{
logerror.Error(info, se);
}
}
}
5,测试
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace TestLog4Net
{
class Program
{
static void Main(string[] args)
{
try
{
LogHelper.WriteLog("程序启动,正常记录!");
int a = Convert.ToInt32("zzz");
}
catch (Exception ex)
{
LogHelper.WriteLog("错误", ex);
}
}
}
}
6,测试结果:运行目录下生成log文件夹,其下两个文件夹:LogError,LogInfo,其内是以日期为文件名的Txt日志
参考: