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" name="allfile" fileName="Logs/service-${shortdate}.log"
layout="${longdate}|${logger}|${uppercase:${level}}|${message} ${exception}" />
</targets>
<rules>
<!--All logs, including from Microsoft-->
<logger name="*" 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("");
Customer = "";
}
}
2、获取实例形式
private static Logger Logger = LogManager.GetCurrentClassLogger();
public static void Main(string[] args)
{
Logger.Error("");
Logger.Info("");
}
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 name="ConsoleAppender" type="log4net.Appender.ConsoleAppender">
<layout type="log4net.Layout.PatternLayout" value="%date [%thread] %-5level %logger - %message%newline" />
</appender> <appender name="FileAppender" 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 name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="logs/" />
<appendToFile value="true" />
<rollingStyle value="Date" />
<staticLogFileName value="false" />
<datePattern value="yyyy-MM-dd'.log'" />
<maxSizeRollBackups value="" />
<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();
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");