关于NLog在.NET CORE下如何进行日志的持久化及通过邮件发送日志

配置过程

1. 安装NLog

   通过Nuget进行集成(NuGet Gallery | NLog.Web.AspNetCore 4.14.0)

   通过命令行安装 Install-Package NLog.Web.AspNetCore -Version 4.14.0

   通过可视化管理工具查找并安装 NLog.Web.AspNetCore

2. 修改Program.cs

   public static IHostBuilder CreateHostBuilder(string[] args) =>
           Host.CreateDefaultBuilder(args)
               .ConfigureLogging((context, builder) =>
               {
                   // 适配原来的Log配置
                   builder.AddConfiguration(context.Configuration.GetSection("Logging"));
                   builder.AddConsole();
                   builder.AddDebug();
                   builder.AddEventSourceLogger();
                   // 以下关键配置
                   builder.AddNLogWeb();
                   builder.AddNLog();
                   // 关键配置结束
               })
               .ConfigureWebHostDefaults(webBuilder =>
               {
                   webBuilder.UseUrls("http://*:5000");
                   webBuilder.UseStartup<Startup>();
               });
   

3. 配置Startup.cs

   public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
   {
       ......
       
       // 在UseEndpoints之前增加如下增加对部分 Layout renderers 的支持
       app.Use(async (context, next) => {
           context.Request.EnableBuffering();
           await next();
       });
       
       ......
   }
   

4. 增加NLog.config

   注意此文件配置为复制到输出目录
   每一项的配置可以参考下方的NLog配置项

   <?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"
         throwConfigExceptions="true">
   
       <targets>
           <!-- 文件持久化 -->
           <target name="f1" xsi:type="File"
                   layout="PROJECT:${iis-site-name}${newline}
   REQUEST:${newline}
   ${aspnet-request-method} ${aspnet-request-url}${newline}
   QUERYSTRING:${newline}
   ${aspnet-request-querystring}${newline}
   HEADERS:${newline}
   ${aspnet-request-headers}${newline}
   FORM:${newline}
   ${aspnet-request-form}${newline}
   POSTED-BODY:${newline}
   ${aspnet-request-posted-body}${newline}
   COOKIE:${newline}
   ${aspnet-request-cookie}${newline}${newline}
   ${longdate}|${uppercase:${level}}|${logger}${newline}${newline}
   ${message}${newline}${newline}
   ${exception:format=ToString}"
                   fileName="Logs\nlog-all-${shortdate}.log" />
           <!-- 邮件支持 -->
           <target xsi:type="Mail"
                   name="m1"
                   html="true"
                   replaceNewlineWithBrTagInHtml="true"
                   addNewLines="true"
                   subject="发送邮件主题：[测试项目][${level}]${message}"
                   to="接收人邮箱"
                   from="发送人邮箱"
                   body="PROJECT:${iis-site-name}${newline}
   REQUEST:${newline}
   ${aspnet-request-method} ${aspnet-request-url}${newline}
   QUERYSTRING:${newline}
   ${aspnet-request-querystring}${newline}
   HEADERS:${newline}
   ${aspnet-request-headers}${newline}
   FORM:${newline}
   ${aspnet-request-form}${newline}
   POSTED-BODY:${newline}
   ${aspnet-request-posted-body}${newline}
   COOKIE:${newline}
   ${aspnet-request-cookie}${newline}${newline}
   ${longdate}|${uppercase:${level}}|${logger}${newline}${newline}
   ${message}${newline}${newline}
   ${exception:format=ToString}"
                   smtpUserName="发送人账号"
                   enableSsl="true"
                   smtpPassword="发送人密码"
                   smtpAuthentication="Basic"
                   smtpServer="发送邮箱的smtp"
                   smtpPort="发送邮箱的smtp端口" />
   
       </targets>
   
       <rules>
           <logger name="*" minlevel="Error" writeTo="f1" />
           <logger name="*" minlevel="Error" maxlevel="Error" writeTo="m1" />
       </rules>
   </nlog>
   

相关资源

NLog官网:NLog (nlog-project.org)

NLog配置项:Config | NLog (nlog-project.org)