BuildWebHost之前的.NET Core NLog日志记录
[英].NET Core NLog logging before BuildWebHost
I use NLog and I have created my own log provider for my application. I set the configuration up with NLog in the StartUp class.
我使用NLog,我已经为我的应用程序创建了自己的日志提供程序。我在StartUp类中使用NLog设置了配置。
I will show you how the Program.cs look right now.
我将向您展示Program.cs现在的样子。
public static void Main(string[] args)
{
var configurationDic = CreateConfigurationDictionary();
// In here it can throw an exception therefore I need to be able to log here
var webHost = BuildWebHost(configurationDic, args);
var applicationLogger = webHost.Services.GetService<IMyTestLogProvider>().ApplicationLogger;
applicationLogger.LogInformation("*************** Start up ***************");
webHost.Run();
}
The logging works fine except that I need to log earlier in the main class. Any ideas how I get my application logger before building the web host?
日志工作正常,但我需要在主类中更早地登录。有关如何在构建Web主机之前获取应用程序记录器的任何想法?
I have seen example, https://github.com/NLog/NLog.Web/wiki/Getting-started-with-ASP.NET-Core-2 , where I should be able to do:
我见过示例,https://github.com/NLog/NLog.Web/wiki/Getting-started-with-ASP.NET-Core-2,我应该可以这样做:
var logger = NLogBuilder.ConfigureNLog("NLog.config").GetCurrentClassLogger();
But my application don't know what NLogBuilder is though I have the NLog nuget packages installed.
但我的应用程序不知道NLogBuilder是什么,虽然我安装了NLog nuget包。
Any ideas?
Best regards Rob
最好的问候Rob
3 个解决方案
#1
0
But my application don't know what NLogBuilder is though I have the NLog nuget packages installed.
但我的应用程序不知道NLogBuilder是什么,虽然我安装了NLog nuget包。
Check your dependencies, you need:
检查您的依赖项,您需要:
- NLog.Web.AspNetCore 4.5+ (currently beta04)
- NLog 4.4.12+ (e.g. NLog 4.5 beta) - no NLog 5! - if not using .NET standard 1
- If you're using .NET standard 1 (not .NET standard 2) - use NLog 5+ (currently beta)
NLog.Web.AspNetCore 4.5+(目前为beta04)
NLog 4.4.12+(例如NLog 4.5 beta) - 没有NLog 5! - 如果不使用.NET标准1
如果您使用的是.NET标准1(非.NET标准2) - 请使用NLog 5+(目前为测试版)
#2
0
Rolf's answer does not work because of a subtle difference.
由于微妙的差异,罗尔夫的答案不起作用。
var logger = NLog.Web.LogBuilder.ConfigureNLog("nlog.config").GetCurrentClassLogger();
var logger = NLog.Web.LogBuilder.ConfigureNLog(“nlog.config”)。GetCurrentClassLogger();
should be
var logger = NLog.Web.NLogBuilder.ConfigureNLog("nlog.config").GetCurrentClassLogger();
var logger = NLog.Web.NLogBuilder.ConfigureNLog(“nlog.config”)。GetCurrentClassLogger();
public static void Main(string[] args)
{
// NLog: setup the logger first to catch all errors
var logger = NLog.Web.NLogBuilder.ConfigureNLog("nlog.config").GetCurrentClassLogger();
try
{
logger.Debug("init main");
BuildWebHost(args).Run();
}
catch (Exception ex)
{
//NLog: catch setup errors
logger.Error(ex, "Stopped program because of exception");
throw;
}
finally
{
// Ensure to flush and stop internal timers/threads before application-exit(Avoid segmentation fault on Linux)
NLog.LogManager.Shutdown();
}
}
#3
0
See updated Wiki for how to activate logging, before BuildWebHost (Update to NLog 4.5.0 RTM or newer)
在BuildWebHost之前查看更新的Wiki,了解如何激活日志记录(更新到NLog 4.5.0 RTM或更新版本)
public static void Main(string[] args)
{
// NLog: setup the logger first to catch all errors
var logger = NLog.Web.NLogBuilder.ConfigureNLog("nlog.config").GetCurrentClassLogger();
try
{
logger.Debug("init main");
BuildWebHost(args).Run();
}
catch (Exception ex)
{
//NLog: catch setup errors
logger.Error(ex, "Stopped program because of exception");
throw;
}
finally
{
// Ensure to flush and stop internal timers/threads before application-exit (Avoid segmentation fault on Linux)
NLog.LogManager.Shutdown();
}
}
https://github.com/NLog/NLog.Web/wiki/Getting-started-with-ASP.NET-Core-2#4-update-programcs
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