详解.net core日记记录

ASP.NET Core 有内置的log组件，遗憾的是看了微软官方文档，貌似无法直接将日志存于文件或数据库，只能由自己实现或引用第三方日志组件。

以下为Nlog和log4net的使用记录

Nlog使用

搜索添加Nuget包

Nlog
Nlog.Web.AspNetCore

新建一个xml文件，并改名为nlog.config

XML内容如下（可配置日志目录名称、输出格式）：

<?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" fileName="Logs/service-${shortdate}.log" layout="${longdate}|${logger}|${uppercase:${level}}|${message} ${exception}" /> </targets> <rules> <!--All logs, including from Microsoft--> <logger minlevel="Trace" writeTo="allfile" /> </rules> </nlog>

将nlog.config设置输出到目录

在Startup类中配置

需要引入命名空间：

using NLog.Extensions.Logging;

using NLog.Web;

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactor) { //使用Nlog loggerFactor.AddNLog(); //引入配置文件 env.ConfigureNLog("nlog.config"); if (env.IsDevelopment()) { app.UseDeveloperExceptionPage(); } else { app.UseExceptionHandler("/Error"); } app.UseStaticFiles(); app.UseCookiePolicy(); app.UseMvc(); }

代码中的使用

有两中方式如下：

1、注入形式

public class IndexModel : PageModel { private ILogger<IndexModel> _logger; public IndexModel(ILogger<IndexModel> logger) { _logger = logger; } public string Customer { get; set; } public void OnGet() { _logger.LogWarning("111111111111111111111"); Customer = "123456"; } }

2、获取实例形式

private static Logger Logger = LogManager.GetCurrentClassLogger(); public static void Main(string[] args) { Logger.Error("22222222222222222222222222222"); Logger.Info("333333333333333333333333333333"); }

 log4net

log4net已支持net core，来看下在net core下是如何配置的，与之前的版本还是有一点的区别

使用惯例，引用Nuget

log4net

新建配置文件

<?xml version="1.0" encoding="utf-8" ?> <configuration> <!-- This section contains the log4net configuration settings --> <log4net> <appender type="log4net.Appender.ConsoleAppender"> <layout type="log4net.Layout.PatternLayout" value="%date [%thread] %-5level %logger - %message%newline" /> </appender> <appender type="log4net.Appender.FileAppender"> <file value="log-file.log" /> <appendToFile value="true" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" /> </layout> </appender> <appender type="log4net.Appender.RollingFileAppender"> <file value="logs/" /> <appendToFile value="true" /> <rollingStyle value="Date" /> <staticLogFileName value="false" /> <datePattern value="yyyy-MM-dd'.log'" /> <maxSizeRollBackups value="7" /> <maximumFileSize value="1MB" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" /> </layout> </appender> <!-- Setup the root category, add the appenders and set the default level --> <root> <level value="ALL" /> <appender-ref ref="ConsoleAppender" /> <appender-ref ref="FileAppender" /> <appender-ref ref="RollingLogFileAppender" /> </root> </log4net> </configuration>

配置文件的相关说明，可以查看另一篇文章点我跳转

在StartUp.cs中配置log4Net

public static ILoggerRepository repository { get; set; } public Startup(IConfiguration configuration) { Configuration = configuration; //log4net repository = LogManager.CreateRepository("NETCoreRepository"); //指定配置文件 XmlConfigurator.Configure(repository, new FileInfo("log4net.config")); }

Controller中的使用

private ILog log = LogManager.GetLogger(Startup.repository.Name, typeof(ValuesController)); [HttpGet] public ActionResult<IEnumerable<string>> Get() { log.Info(1111111111111111111); return new string[] { "value1", "value2" }; }

控制台中的使用

ILoggerRepository repository = LogManager.CreateRepository("NETCoreRepository"); XmlConfigurator.Configure(repository, new FileInfo("log4net.config")); ILog log = LogManager.GetLogger(repository.Name,"NETCorelog4net"); log.Info("test log");