.net5 使用Log4net记录日志

安装两个包
log4.net
Microsoft.Extensions.Logging;
这里用两种方式实现
log4net.config

第一种

 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();
                }).ConfigureLogging(options=> {
                    options.AddLog4Net("cigfile/log4net.Config");
                });
    }

第二种
在startup中
ILoggerFactory 工厂

  public void Configure(IApplicationBuilder app, IWebHostEnvironment env, ILoggerFactory loggerFactory)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            loggerFactory.AddLog4Net("cigfile/log4net.Config");
            app.UseHttpsRedirection();

            app.UseRouting();

            app.UseAuthentication();//开启认证

            app.UseAuthorization();//开启授权




            app.UseAuthorization();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllers();
            });
        }

使用

  public ILogger _logger;
       
        public BillQueryController(ILogger logger)
        {
            _logger = logger;
           
        }
        [HttpGet]
        public void Get()
        {
            _logger.LogWarning("222");
           
        }