ASP.NET CORE下日志NLOG使用

ASP.NET CORE下日志NLOG使用

摘自《深入浅出ASP.NET CORE》

NUGET：NLog.Web.AspNetCore 4.9.0

根目录下nlog.config

?

1 2 3 4 5 6 7 8 9 10

<?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">     <targets>         <target name="allfile" xsi:type="File" fileName="Logs/${shortdate}.log"></target>     </targets>     <rules>         <logger name="*" minlevel="Trace" writeTo="allfile"></logger>     </rules> </nlog>

.net core 3.1项目中的program

?

1 2 3 4 5 6 7 8 9 10

public static IHostBuilder CreateHostBuilder(string[] args) =>             Host.CreateDefaultBuilder(args)              .ConfigureLogging((hostingContext, logging) =>              {                  logging.AddNLog(); //加入nlog              })             .ConfigureWebHostDefaults(webBuilder =>             {                 webBuilder.UseStartup<Startup>();             });

net7项目中的program 只需要加一句：builder.Logging.AddNLog(); 就行，如果要测试把下面的 if (!app.Environment.IsDevelopment())注释掉就行

/home/error方法里的代码：

?

1 2 3 4 5 6 7 8 9 10 11 12

private readonly ILogger<HomeController> _logger;   [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)] public IActionResult Error() {         var ex = HttpContext.Features.Get<IExceptionHandlerPathFeature>();         ViewBag.ExceptionPath = ex.Path;         ViewBag.ExceptionMessage = ex.Error.Message;         ViewBag.StackTrace = ex.Error.StackTrace;         _logger.LogError($"异常路径：{ex.Path}\r\n异常信息：{ex.Error.Message}\r\n堆栈跟踪：{ex.Error.StackTrace}\r\n\r\n\r\n");         return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier }); }