.Net Core 2配置 Nlog 日志组件学习笔记 [1]
开发工具:Visual Studio 2017
要求:.NET 4.6+ or .NET standard 2
[1] 新建一个.net core项目且编辑csproj文件 或者直接用nuget management
Nlog最新版本:
NLog.Web.AspNetCore 4.8+
csproj文件:
<PackageReference Include="NLog.Web.AspNetCore" Version="4.8.0" /> <PackageReference Include="NLog" Version="4.5.11" />
[2] 为Nlog创建Nlog.config配置文件(在项目根目录)
<?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 --> <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: ${aspnet-mvc-action}" /> </targets> <!-- rules to map from logger name to target --> <rules> <!--All logs, including from Microsoft--> <logger name="*" minlevel="Trace" writeTo="allfile" /> <!--Skip non-critical Microsoft logs and so log only own logs--> <logger name="Microsoft.*" maxlevel="Info" final="true" /> <!-- BlackHole without writeTo --> <logger name="*" minlevel="Trace" writeTo="ownFile-web" /> </rules> </nlog>
这里另外提供网上找到觉得还可以的配置:
<?xml version="1.0" encoding="utf-8" ?> <nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" autoReload="true" internalLogLevel="Warn" internalLogFile="internal-nlog.txt"> <!-- define various log targets --> <targets> <!-- write logs to file --> <target xsi:type="File" name="allfile" fileName="${basedir}/logs/${level}_${shortdate}.log" layout="${longdate}|${logger}|${uppercase:${level}}|${message} ${exception}" /> <target xsi:type="File" name="ownFile-web" fileName="${basedir}/logs/own_${level}_${shortdate}.log" layout="${longdate}|${logger}|${uppercase:${level}}| ${message} ${exception}" /> <target xsi:type="Null" name="blackhole" /> </targets> <rules> <!--All logs, including from Microsoft--> <logger name="*" minlevel="Trace" writeTo="allfile" /> <!--Skip Microsoft logs and so log only own logs--> <logger name="Microsoft.*" minlevel="Trace" writeTo="blackhole" final="true" /> <logger name="*" minlevel="Trace" writeTo="ownFile-web" /> </rules> </nlog>
更多配置请看,另外一篇:连接
[3] 给配置文件设置为 Copy If newer
或者修改 .csproj 配置文件
<ItemGroup> <Content Update="nlog.config" CopyToOutputDirectory="PreserveNewest" /> </ItemGroup>
[4] 修改Program.cs 文件
using NLog.Web; using Microsoft.Extensions.Logging; public static void Main(string[] args) { // NLog: setup the logger first to catch all errors var logger = NLog.Web.NLogBuilder.ConfigureNLog("nlog.config").GetCurrentClassLogger(); try { logger.Debug("init main"); CreateWebHostBuilder(args).Build().Run(); } catch (Exception ex) { //NLog: catch setup errors logger.Error(ex, "Stopped program because of exception"); throw; } finally { // Ensure to flush and stop internal timers/threads before application-exit (Avoid segmentation fault on Linux) NLog.LogManager.Shutdown(); } } public static IWebHostBuilder CreateWebHostBuilder(string[] args) => WebHost.CreateDefaultBuilder(args) .UseStartup<Startup>() .ConfigureLogging(logging => { logging.ClearProviders(); logging.SetMinimumLevel(Microsoft.Extensions.Logging.LogLevel.Trace); }) .UseNLog(); // NLog: setup NLog for Dependency injection
[5] 配置 Appsettings.json 文件
appsettings.json中指定的日志配置将覆盖对setminimumLevel的任何调用。因此,要么删除“默认值”:要么根据需要正确地调整它。
记得调用修改部署环境下的 appsettings.Development.json文件
{ "Logging": { "LogLevel": { "Default": "Trace", "Microsoft": "Information" } } }
[6] 注入到要写Log的Controller 中
using Microsoft.Extensions.Logging; public class HomeController : Controller { private readonly ILogger<HomeController> _logger; public HomeController(ILogger<HomeController> logger) { _logger = logger; } public IActionResult Index() { _logger.LogInformation("Index page says hello"); return View(); }
最后,尝试运行一下吧~