C#通過NLog記錄日誌

對於.net程序記錄log的主流控件，有：log4net和NLog

log4net比較老牌，但是log4net截止到2017年就不再更新了，而NLog更新比較活躍，我比較喜歡長期有更新的控件~~

 

功能上沒有什麼差別。

 

使用方法：

1. Nuget安裝NLog和NLog.config兩個庫

2. 配置config文件

3. 代碼中使用

 

操作代碼：

NLog.Logger log = NLog.LogManager.GetCurrentClassLogger();
log.Trace("記錄一條Trace log");
log.Debug("記錄一條Debug log");
log.Info("記錄一條Info log");
log.Warn("記錄一條Waring log");
log.Error("記錄一條Error log");
log.Fatal("記錄一條Fatal log");

配置文件：

<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://www.nlog-project.org/schemas/NLog.xsd NLog.xsd"
      autoReload="true"
      throwExceptions="false"
      internalLogLevel="Off" internalLogFile="c:\temp\nlog-internal.log">

  <!-- optional, add some variables
  https://github.com/nlog/NLog/wiki/Configuration-file#variables
  -->
  <variable name="myvar" value="myvalue"/>

  <!--
  See https://github.com/nlog/nlog/wiki/Configuration-file
  for information on customizing logging rules and outputs.
   -->
  <targets>
    <target name="log_file" xsi:type="File"
                        fileName="${basedir}/Logs/${shortdate}.txt"
                        layout="${longdate} | ${level:uppercase=false:padding=-5} ${message} ${onexception:${exception:format=toString} ${newline} ${stacktrace} ${newline} ${DatabaseName}" />
    <!--
    add your targets here
    See https://github.com/nlog/NLog/wiki/Targets for possible targets.
    See https://github.com/nlog/NLog/wiki/Layout-Renderers for the possible layout renderers.
    -->

    <!--
    Write events to a file with the date in the filename.
    <target xsi:type="File" name="f" fileName="${basedir}/logs/${shortdate}.log"
            layout="${longdate} ${uppercase:${level}} ${message}" />
    -->
  </targets>

  <rules>
    <logger name="*" levels="Trace" writeTo="log_file" />
    <logger name="*" levels="Debug" writeTo="log_file" />
    <logger name="*" levels="Info" writeTo="log_file" />
    <logger name="*" levels="Warn" writeTo="log_file" />
    <logger name="*" levels="Error" writeTo="log_file" />
    <logger name="*" levels="Fatal" writeTo="log_file" />
    <!-- add your logging rules here -->

    <!--
    Write all events with minimal level of Debug (So Debug, Info, Warn, Error and Fatal, but not Trace)  to "f"
    <logger name="*" minlevel="Debug" writeTo="f" />
    -->
  </rules>
</nlog>

使用效果：