.NET Core下使用Log4Net记录日志的方法步骤_实用技巧_

 Install-Package log4net

 using log4net; using log4net.Config; using System; using System.IO; using System.Reflection; namespace ConsoleAppDemo { class Program { static void Main(string[] args) { var log4netRepository = LogManager.GetRepository(Assembly.GetEntryAssembly()); XmlConfigurator.Configure(log4netRepository, new FileInfo("log4net.config")); ILog log = LogManager.GetLogger(log4netRepository.Name, "NETCorelog4net"); log.Info("NETCorelog4net log"); log.Info("test log"); log.Error("error"); log.Info("linezero"); Console.ReadKey(); } } }

 public static class Log4NetExtensions { public static IHostBuilder UseLog4Net(this IHostBuilder hostBuilder) { var log4netRepository = LogManager.GetRepository(Assembly.GetEntryAssembly()); XmlConfigurator.Configure(log4netRepository, new FileInfo("log4net.config")); return hostBuilder; } }

 using Microsoft.AspNetCore.Hosting; using Microsoft.Extensions.Hosting; namespace WebAppDemo { public class Program { public static void Main(string[] args) { CreateHostBuilder(args).Build().Run(); } public static IHostBuilder CreateHostBuilder(string[] args) => Host.CreateDefaultBuilder(args) .ConfigureWebHostDefaults(webBuilder => { webBuilder.UseStartup(); }).UseLog4Net(); } }

 using log4net; using Microsoft.AspNetCore.Mvc; using System; using System.Collections.Generic; using System.Linq; namespace WebAppDemo.Controllers { [ApiController] [Route("[controller]")] public class WeatherForecastController : ControllerBase { private static readonly string[] Summaries = new[] { "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching" }; private readonly ILog _log; public WeatherForecastController() { _log = LogManager.GetLogger(typeof(WeatherForecastController)); } [HttpGet] public IEnumerable Get() { _log.Info("Hello, this is a Weather api!"); _log.Warn("Wran !!!"); _log.Error("Controller Error"); var rng = new Random(); return Enumerable.Range(1, 5).Select(index => new WeatherForecast { Date = DateTime.Now.AddDays(index), TemperatureC = rng.Next(-20, 55), Summary = Summaries[rng.Next(Summaries.Length)] }) .ToArray(); } } }