ASP.NET Core 2.0使用Log4net实现记录日志功能
一、安装Log4net
1、使用Nuget包进行安装
在依赖项上面右键，选择“管理NuGet程序包”，如下图所示：
在浏览界面输入log4net，然后点击安装，如下图所示：
2、使用程序包管理器控制台进行安装
使用Install-Package Log4net命令进行安装，如下图所示：
二、配置log4net使用的配置文件
配置文件如下：
1 <?xml version="1.0" encoding="utf-8" ?> 2 <configuration> 3 <!-- This section contains the log4net configuration settings --> 4 <log4net> 5 <appender name="ConsoleAppender" type="log4net.Appender.ConsoleAppender"> 6 <layout type="log4net.Layout.PatternLayout" value="%date [%thread] %-5level %logger - %message%newline" /> 7 </appender> 8 9 <appender name="FileAppender" type="log4net.Appender.FileAppender"> 10 <file value="log-file.log" /> 11 <appendToFile value="true" /> 12 <layout type="log4net.Layout.PatternLayout"> 13 <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" /> 14 </layout> 15 </appender> 16 17 <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender"> 18 <file value="D:\study\logfile/" /> //指定日志文件保存的目录 19 <appendToFile value="true" /> 20 <rollingStyle value="Composite" /> 21 <staticLogFileName value="false" /> 22 <datePattern value="yyyyMMdd'.log'" /> 23 <maxSizeRollBackups value="10" /> 24 <maximumFileSize value="1MB" /> 25 <layout type="log4net.Layout.PatternLayout"> 26 <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" /> 27 </layout> 28 </appender> 29 30 <!-- Setup the root category, add the appenders and set the default level --> 31 <root> 32 <level value="ALL" /> 33 <appender-ref ref="ConsoleAppender" /> 34 <appender-ref ref="FileAppender" /> 35 <appender-ref ref="RollingLogFileAppender" /> 36 </root> 37 38 </log4net> 39 </configuration>
三、在Startup.cs类里面配置使用log4net
1 public static ILoggerRepository repository { get; set; } 2 public Startup(IConfiguration configuration) 3 { 4 Configuration = configuration; 5 repository = LogManager.CreateRepository("NETCoreRepository"); 6 // 指定配置文件 7 XmlConfigurator.Configure(repository, new FileInfo("log4net.config")); 8 }
四、在控制器里面注入log4net
1 using System; 2 using System.Collections.Generic; 3 using System.Diagnostics; 4 using System.Linq; 5 using System.Threading.Tasks; 6 using log4net; 7 using Microsoft.AspNetCore.Hosting; 8 using Microsoft.AspNetCore.Mvc; 9 using NetCoreLogDemo.Models; 10 11 namespace NetCoreLogDemo.Controllers 12 { 13 public class HomeController : Controller 14 { 15 private ILog log; 16 17 public HomeController(IHostingEnvironment hostingEnv) 18 { 19 this.log = LogManager.GetLogger(Startup.repository.Name, typeof(HomeController)); 20 } 21 22 public IActionResult Index() 23 { 24 log.Error("测试日志"); 25 return View(); 26 } 27 28 public IActionResult About() 29 { 30 ViewData["Message"] = "Your application description page."; 31 32 return View(); 33 } 34 35 public IActionResult Contact() 36 { 37 ViewData["Message"] = "Your contact page."; 38 39 return View(); 40 } 41 42 public IActionResult Error() 43 { 44 return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier }); 45 } 46 } 47 }
测试结果：
