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
<?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/${shortdate}.log"></target>
</targets>
<rules>
<logger name="*" minlevel="Trace" writeTo="allfile"></logger>
</rules>
</nlog>
.net core 3.1项目中的program
public static IHostBuilder CreateHostBuilder(string[] args) =>
Host.CreateDefaultBuilder(args)
.ConfigureLogging((hostingContext, logging) =>
{
logging.AddNLog(); //加入nlog
})
.ConfigureWebHostDefaults(webBuilder =>
{
webBuilder.UseStartup<Startup>();
});
net7项目中的program 只需要加一句：builder.Logging.AddNLog(); 就行，如果要测试把下面的 if (!app.Environment.IsDevelopment())注释掉就行
/home/error方法里的代码：
private readonly ILogger<HomeController> _logger;
[ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
public IActionResult Error()
{
var ex = HttpContext.Features.Get<IExceptionHandlerPathFeature>();
ViewBag.ExceptionPath = ex.Path;
ViewBag.ExceptionMessage = ex.Error.Message;
ViewBag.StackTrace = ex.Error.StackTrace;
_logger.LogError($"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 });
}