.NET CORE 3.1 MVC Log4net

1 引用包：Microsoft.Extensions.Logging.Log4Net.AspNetCore
 
2 ILoggerFactory loggerFactory 注册

 public void Configure(IApplicationBuilder app, IWebHostEnvironment env, ILoggerFactory loggerFactory)        {            loggerFactory.AddLog4Net();            if (env.IsDevelopment())            {                app.UseDeveloperExceptionPage();            }            else            {                app.UseExceptionHandler("/Home/Error");                // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.                app.UseHsts();            }            app.UseHttpsRedirection();            app.UseStaticFiles();
            app.UseRouting();
            app.UseAuthorization();
            app.UseEndpoints(endpoints =>            {                endpoints.MapControllerRoute(                    name: "default",                    pattern: "{controller=Home}/{action=Index}/{id?}");            });        }
 
3 配置log4net.config
<log4net>
 <root>		<level value="ALL" ref="infoAppender" />		<appender-ref ref="infoAppender" />		<appender-ref ref="errorAppender" />		<appender-ref ref="debugAppender" />	</root>
	<!-- 日志的等级，它们由高到底分别为： OFF > FATAL > ERROR > WARN > INFO > DEBUG > ALL -->	<!--信息日志配置-->	<!--<appender name="infoAppender" type="log4net.Appender.RollingFileAppender">		<param name="File" value="../../../Logs/Info/info.log" />		<param name="AppendToFile" value="false" />		<param name="MaxFileSize" value="10240" />		<param name="MaxSizeRollBackups" value="100" />		<param name="PreserveLogFileNameExtension" value="true" />		<param name="StaticLogFileName" value="false" />		<param name="DatePattern" value="yyyyMMdd" />		<param name="RollingStyle" value="Date" />		<layout type="log4net.Layout.PatternLayout">			<conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />		</layout>		<filter type="log4net.Filter.LevelRangeFilter">			<param name="LevelMin" value="OFF" />			<param name="LevelMax" value="OFF" />		</filter>	</appender>-->
	<!--调试日志配置-->	<!--<appender name="debugAppender" type="log4net.Appender.RollingFileAppender">		<param name="File" value="../../../Logs/Debug/debug.log" />		<param name="AppendToFile" value="false" />		<param name="MaxFileSize" value="10240" />		<param name="MaxSizeRollBackups" value="100" />		<param name="PreserveLogFileNameExtension" value="true" />		<param name="StaticLogFileName" value="false" />		<param name="DatePattern" value="yyyyMMdd" />		<param name="RollingStyle" value="Date" />		<layout type="log4net.Layout.PatternLayout">			<conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />		</layout>		<filter type="log4net.Filter.LevelRangeFilter">			<param name="LevelMin" value="OFF" />			<param name="LevelMax" value="OFF" />		</filter>	</appender>-->
	<!--错误日志配置-->	<appender name="errorAppender" type="log4net.Appender.RollingFileAppender">		<param name="File" value="../../../Logs/Error/Err.log" />		<param name="AppendToFile" value="true" />		<param name="MaxFileSize" value="10240" />Backups" value="100" />		<param name="PreserveLogFileNameExtension" value="true" />		<param name="StaticLogFileName" value="false" />		<param name="DatePattern" value="yyyyMMdd" />		<param name="RollingStyle" value="Date" />		<layout type="log4net.Layout.PatternLayout">			<conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />		</layout>		<filter type="log4net.Filter.LevelRangeFilter">			<param name="LevelMin" value="ERROR" />			<param name="LevelMax" value="ERROR" />		</filter>	</appender></log4net>
 
4  项目实际使用
 public class HomeController : Controller    {        private readonly ILogger<HomeController> _logger;
        public HomeController(ILogger<HomeController> logger)        {            _logger = logger;        }
 
        public IActionResult Privacy()        {            _logger.LogError("这里记录的是LogError: 您在" + DateTime.Now.ToString()+"查看了Privacy" );
            return View();        }
    }
5 效果展示