ASP.NET Core 添加NLog日志支持(VS2015update3&VS2017)_.NET_编程开发_程序员俱乐部

1.创建一个新的ASP.NET Core项目

2.添加项目依赖

• NLog.Web.AspNetCore

3.在项目目录下添加nlog.config文件:

 1 <?xml version="1.0" encoding="utf-8" ?>
 2 <nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
 3       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4       autoReload="true"
 5       internalLogLevel="Warn"
 6       internalLogFile="c:\temp\internal-nlog.txt">
 7 
 8   <!-- 加载ASP.NET Core插件 -->
 9   <extensions>
10     <add assembly="NLog.Web.AspNetCore"/>
11   </extensions>
12 
13   <!-- 输出目的地 -->
14   <targets>
15      <!-- 输出到文件,这个文件记录所有日志 -->
16      <target xsi:type="File" name="allfile" fileName="c:\temp\nlog-all-${shortdate}.log"
17                  layout="${longdate}|${event-properties:item=EventId.Id}|${logger}|${uppercase:${level}}|${message} ${exception}" />
18 
19    <!-- 另外一个日志记录文件,户口也跳过Microsoft开头相关日志信息 -->
20      <target xsi:type="File" name="ownFile-web" fileName="c:\temp\nlog-own-${shortdate}.log"
21              layout="${longdate}|${event-properties:item=EventId.Id}|${logger}|${uppercase:${level}}|  ${message} ${exception}|url: ${aspnet-request-url}|action: ${aspnet-mvc-action}" />
22 
23      <!-- write to the void aka just remove -->
24     <target xsi:type="Null" name="blackhole" />
25   </targets>
26 
27   <!-- 写入目的地的规则 -->
28   <rules>
29     <!--全部记录,包括Microsoft开头的相关日志信息-->
30     <logger name="*" minlevel="Trace" writeTo="allfile" />
31 
32     <!--跳过Microsoft开头的相关日志信息-->
33     <logger name="Microsoft.*" minlevel="Trace" writeTo="blackhole" final="true" />
34     <logger name="*" minlevel="Trace" writeTo="ownFile-web" />
35   </rules>
36 </nlog>

 3.将nlog.config复制到bin文件夹

4.在startup.cs文件中添加(红字):

 1 using NLog.Extensions.Logging;
 2 using NLog.Web;
 3 
 4 public Startup(IHostingEnvironment env)
 5 {
 6     env.ConfigureNLog("nlog.config");
 7 }
 8 
 9 public void ConfigureServices(IServiceCollection Services)
10 {
11     //call this in case you need aspnet-user-authtype/aspnet-user-identity
12     services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
13 }
14 
15 // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
16 public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
17 {
18 
19     //add NLog to ASP.NET Core
20     loggerFactory.AddNLog();
21 
22     //add NLog.Web
23     app.AddNLogWeb();
24 
25    //note: remove the old loggerFactory, like loggerFactory.AddConsole and  loggerFactory.AddDebug

5.记录日志

 1 public class HomeController : Controller
 2     {
 3         private readonly ILogger<HomeController> _logger;
 4 
 5         public HomeController(ILogger<HomeController> logger)
 6         {
 7             _logger = logger;
 8         }
 9 
10         public IActionResult Index()
11         {
12             _logger.LogInformation("Index page says hello");
13             return View();
14         }

6.运行ASP.NET Core网站,会生成两个文件

nlog-own-2017-04-28.log和nlog-all-2017-04-28.log