ASP.NET CORE下日志NLOG使用

牛腩的编程不归路 / 2023-08-01 / 原文

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 });
}

 