C#NLog日志组件使用

1,引用NLog.dll

2,添加配置文件NLog.config

【2.1】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"
      autoReload="true"
      internalLogLevel="Trace"
      internalLogFile="D:\work\log.txt">-->

<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      autoReload="true">

  <targets>

    <!-- Log in a separate thread, possibly queueing up to
        5000 messages. When the queue overflows, discard any
        extra messages-->

    <!-- write logs to file 【方式1】：存入文件-->
    <target name="file" xsi:type="AsyncWrapper" queueLimit="5000" overflowAction="Discard">
      <target xsi:type="File" fileName="${basedir}/logs/${shortdate}.log" layout="${longdate} ${level:uppercase=true} ${event-context:item=Action} ${message} ${event-context:item=Amount} ${stacktrace}" />
    </target>

    <!-- write log message to database 【方式2】：存入数据库 --><!--
    <target name="db" xsi:type="AsyncWrapper" queueLimit="5000" overflowAction="Discard">
      <target type="Database" dbProvider="mssql" connectionString="Data Source=.\SQLEXPRESS;Initial Catalog=EFinance;Persist Security Info=True;User ID=sa;Password=123456;">

        <commandText>
          INSERT INTO Log(Timestamp,Level,Message,Action,Amount,StackTrace) VALUES(@time_stamp, @level, @message, @action, @amount, @stacktrace);
        </commandText>

        --><!-- database connection parameters --><!--
        <parameter name="@time_stamp" layout="${date}" />
        <parameter name="@level" layout="${level:uppercase=true}" />
        <parameter name="@message" layout="${message}" />
        <parameter name="@action" layout="${event-context:item=Action}" />
        <parameter name="@amount" layout="${event-context:item=Amount}" />
        <parameter name="@stacktrace" layout="${stacktrace}" />
      </target>
    </target>

    --><!--write log message to Visual Studio Output 【方式3】：debug调试，显示在输出--><!--
    <target name="debugger" xsi:type="Debugger" layout="NLog: ${date:format=HH\:mm\:ss} | ${level:uppercase=true:padding=-5} | ${message}" />-->
  </targets>

  <rules>
    <!--rules:规则配置-->
    <!--TRACE,DEBUG,INFO,WARN,ERROR,FATAL-->
    <logger name="*" minlevel="Trace" writeTo="debugger" />
    <!--INFO,WARN,ERROR,FATAL-->
    <logger name="*" minlevel="Info" writeTo="db" />
    <!--DEBUG,INFO,WARN,ERROR,FATAL-->
    <logger name="*" minlevel="Debug" writeTo="file" />
  </rules>
</nlog>

【2.2】　特别注意，NLog.config的属性》复制到输出目录》始终复制　

3，NLogHelper类

namespace AutomaticStoreMotionDal
{
    public class NLogHelper
    {
        private static NLog.Logger logger = NLog.LogManager.GetCurrentClassLogger();

        #region Debug

        public static void Debug(string msg, params object[] args)
        {
            logger.Debug(msg, args);
        }

        public static void Debug(string msg, Exception err)
        {
            logger.Debug(err, msg);
        }

        #endregion

        #region Info

        public static void Info(string msg, params object[] args)
        {
            logger.Info(msg, args);
        }

        public static void Info(string msg, Exception err)
        {
            logger.Info(err, msg);
        }

        #endregion

        #region Warn

        public static void Warn(string msg, params object[] args)
        {
            logger.Warn(msg, args);
        }

        public static void Warn(string msg, Exception err)
        {
            logger.Warn(err, msg);
        }

        #endregion

        #region Trace

        public static void Trace(string msg, params object[] args)
        {
            logger.Trace(msg, args);
        }

        public static void Trace(string msg, Exception err)
        {
            logger.Trace(err, msg);
        }

        #endregion

        #region Error

        public static void Error(string msg, params object[] args)
        {
            logger.Error(msg, args);
        }

        public static void Error(string msg, Exception err)
        {
            logger.Error(err, msg);
        }

        #endregion

        #region Fatal

        public static void Fatal(string msg, params object[] args)
        {
            logger.Fatal(msg, args);
        }

        public static void Fatal(string msg, Exception err)
        {
            logger.Fatal(err, msg);
        }

        #endregion
    }
}

　　

4，项目中使用

NLogHelper.Info("登录成功");

　　

5，查看日志