Net 6 添加NLog

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创建一个.Net 6 Demo项目

引入NLog包

添加项目配置文件nlog.config

<?xml version="1.0" encoding="utf-8"?> <nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd" xsi:schemaLocation="NLog NLog.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" autoReload="true" > <!-- the targets to write to --> <targets> <!--单个文件过大会导致写入效率下降，可配置单个文件的最大容量--> <target name="File" xsi:type="AsyncWrapper" queueLimit="5000" overflowAction="Discard"> <target xsi:type="File" fileName="${basedir}/logs/${shortdate}.log" layout="${date:yyyy-MM-dd HH\:mm\:ss} ${level:uppercase=true} ${event-context:item=Action} ${message} ${event-context:item=Amount} ${stacktrace}" archiveAboveSize="10240" archiveEvery="Day" /> </target> <!-- write logs to file --> <!--<target xsi:type="File" name="logfile" fileName="c:\temp\console-example.log" layout="${longdate}|${level}|${message} |${all-event-properties} ${exception:format=tostring}" />--> <!--<target xsi:type="Console" name="logconsole" layout="${longdate}|${level}|${message} |${all-event-properties} ${exception:format=tostring}" />--> </targets> <!-- rules to map from logger name to target --> <rules> <!--<logger name="*" levels="Debug,Info,Warn,Error" writeTo="File" />--> <logger name="*" minlevel="Debug" maxlevel="Error" writeTo="File" /> </rules> </nlog>

layout布局：

${longdate} 格式：2022-01-21 17:00:28.4860

后面的毫秒不是我想要的，可以自定义：date:yyyy-MM-dd HH\:mm\:ss

NLog等级

Trace：最常见的记录信息，一般是普通输出

Debug：同样是记录信息，出现的频率比Trace少，一般是调试程序

Info：信息类型的消息

Warn：警告消息

Error：错误消息

自上而下，等级递增

指定特定等级：level=”Warn”

指定多个等级：levels=”Debug,Info” 以逗号分隔

指定等级范围：minlevel=”Info” maxlevel=”Error”

<rules> <!--<logger name="*" levels="Debug,Info,Warn,Error" writeTo="File" />--> <logger name="*" minlevel="Debug" maxlevel="Error" writeTo="File" /> </rules> 

添加工具类 Logger

using NLog; namespace TestNet6.Utilities { public class Logger { NLog.Logger _logger { get; set; } private Logger(NLog.Logger logger) { _logger = logger; } public Logger(string name) : this(LogManager.GetLogger(name)) { } public static Logger Default { get; private set; } static Logger() { Default = new Logger(LogManager.GetCurrentClassLogger()); } #region Dedub public void Debug(string msg, params object[] args) { _logger.Debug(msg, args); } public void Debug(string msg, Exception e) { _logger.Debug(e, msg); } #endregion #region Info public void Info(string msg, params object[] args) { _logger.Info(msg, args); } public void Info(string msg, Exception e) { _logger.Info(e, msg); } #endregion #region Trace public void Trace(string msg, params object[] args) { _logger.Trace(msg, args); } public void Trace(string msg, Exception e) { _logger.Trace(e, msg); } #endregion #region Warn public void Warn(string msg, params object[] args) { _logger.Warn(msg, args); } public void Warn(string msg, Exception e) { _logger.Warn(e, msg); } #endregion #region Error public void Error(string msg, params object[] args) { _logger.Error(msg, args); } public void Error(string msg, Exception e) { _logger.Error(e, msg); } #endregion } }

添加测试Controller

using Microsoft.AspNetCore.Mvc; using TestNet6.Utilities; namespace TestNet6.Controllers { public class TestController : Controller { public ActionResult Index() { return View(); } public string Test() { Logger.Default.Info("", Request); return "Test String"; } } }

最后为了让路由有效，还需要添加路由映射

var builder = WebApplication.CreateBuilder(args); // Add services to the container. builder.Services.AddRazorPages(); var app = builder.Build(); // Configure the HTTP request pipeline. if (!app.Environment.IsDevelopment()) { app.UseExceptionHandler("/Error"); // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts. app.UseHsts(); } app.UseHttpsRedirection(); app.UseStaticFiles(); app.UseRouting(); app.UseAuthorization(); app.MapRazorPages(); //添加路由映射 app.MapControllerRoute(name: "default", pattern: "{controller=Home}/{action=Index}/{id?}"); app.Run();

OK，运行测试