Nlog日志在AspNetCore中使用

Nlog是一款第三方的日志记录插件，netcore中有内置的日志记录文件。

NLog官方网址：https://nlog-project.org/

关于各项配置都可以详细阅读官方文档，以下是我配置的进攻大家参考

1.首先引入包

 

 　　2.然后创建配置文件

　　配置文件在根目录下创建,创建一个XML格式的配置文件，名称必须是nlog

 

 创建完成后将以下配置导入配置文件中

<?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="Info"
      internalLogFile="c:\temp\internal-nlog.txt">

  <!-- enable asp.net core layout renderers -->
  <extensions>
    <add assembly="NLog.Web.AspNetCore"/>
  </extensions>

  <!-- the targets to write to -->
  <targets>
    <!-- write logs to file fileName:日志存储位置可任意更改 -->
    <target xsi:type="File" name="allfile" fileName="c:\temp\nlog-all-${shortdate}.log"
            layout="${longdate}|${event-properties:item=EventId_Id}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}" />

    <!-- another file log, only own logs. Uses some ASP.NET core renderers -->
    <target xsi:type="File" name="ownFile-web" fileName="c:\temp\nlog-own-${shortdate}.log"
            layout="${longdate}|${event-properties:item=EventId_Id}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}|url: ${aspnet-request-url}|action: ${aspnet-mvc-action}" />
  </targets>

  <!-- rules to map from logger name to target -->
  <rules>
    <!--All logs, including from Microsoft-->
    <logger name="*" minlevel="Trace" writeTo="allfile" />

    <!--Skip non-critical Microsoft logs and so log only own logs-->
    <logger name="Microsoft.*" maxlevel="Info" final="true" />
    <!-- BlackHole without writeTo -->
    <logger name="*" minlevel="Trace" writeTo="ownFile-web" />
  </rules>
</nlog>

 

3.然后再program.cs类中加入以下配置

        public static void Main(string[] args)
        {
            // NLog: 首先设置记录器以捕获所有错误
            var logger = NLog.Web.NLogBuilder.ConfigureNLog("nlog.config").GetCurrentClassLogger();
            try
            {
                logger.Debug("init main");
                CreateHostBuilder(args).Build().Run();
            }
            catch (Exception ex)
            {
                //NLog:捕获设置错误
                logger.Error(ex, "Stopped program because of exception");
                throw;
            }
            finally
            {
                // 确保在应用程序退出之前刷新并停止内部计时器/线程（避免Linux上出现分段错误）
                NLog.LogManager.Shutdown();
            }
           
        }
 public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseStartup<Startup>();
                })
                .ConfigureLogging(logging =>
                {
                    logging.ClearProviders();
                    logging.SetMinimumLevel(Microsoft.Extensions.Logging.LogLevel.Trace);
                })
                //使用NLog日志记录
                .UseNLog();

 

4.然后就可以放心使用了，他已经注入到容器中了，以下是使用案例

 

 

  public void Configure(IApplicationBuilder app, IWebHostEnvironment env,ILogger<Startup> _logger)
        {
            
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            _logger.LogInformation("记录此处错误129873917931730106301606320101601");
            _logger.LogWarning("记录此处warning错误129873917931730106301606320101601");
            app.UseRouting();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapGet("/", async context =>
                {
                    await context.Response.WriteAsync("Hello World!");
                });
            });
        }

5.验证是正确的