ASP.NET Core 添加NLog日志支持(VS2015update3&VS2017)

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