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