log4net使用

添加log4net.dll引用
在項目根目錄下新建log4net.XML

log4net.XML
<?XML version="1.0" encoding="utf-8" ?>
<log4net>
 
  <root>
    <level value="INFO" />
    <appender-ref ref="LogFileAppender" />
  </root>

  <appender name="LogFileAppender" type="log4net.Appender.FileAppender" >
    <param name="File" value="log.txt" />
    <param name="AppendToFile" value="true" />
   
    <layout type="log4net.Layout.PatternLayout">
        <param name="ConversionPattern" value="%-5p  %d    %c   %m%n"/>
    </layout>

    <filter type="log4net.Filter.LevelRangeFilter">
      <param name="LevelMin" value="DEBUG" />
      <param name="LevelMax" value="INFO" />
    </filter>
   
  </appender>
 
  <appender name="ConsoleAppender" type="log4net.Appender.ConsoleAppender" >
    <layout type="log4net.Layout.PatternLayout">
       <param name="ConversionPattern"  value="%d [%t] %-5p %c [%x] - %m%n"/>
    </layout>
  </appender>
 
</log4net>

在AssemblyInfo.cs中添加
[assembly: log4net.Config.DOMConfigurator(ConfigFile = "log4net.XML", Watch = true)]

在程序中聲明
private static readonly ILog logger = LogManager.GetLogger(typeof(Form1));

logger.Info("開始備份數據.");