我发现一个
CodeProject的例子，如何让这个工作，但它不工作。主要的问题似乎是Nuget中似乎不存在“Microsoft.Framework.Logging.NLog”：“1.0.0- *”包。我看过
this StackOverflow question，看了它引用的GitHub示例，但它似乎包含相同的问题。
我试图让我自己工作，我想出来的最好的是：
public class NLogLogger : ILogger
{
public NLogLogger()
{
new WebLoggerConfigurer().ConfigureDefault();
}
public void Log(LogLevel logLevel,int eventId,object state,Exception exception,Func<object,Exception,string> formatter)
{
// currently need the global:: for LogLevels because our namespace contains NLog in it. Is there a better naming convention we could use instead?
var ll = logLevel == LogLevel.Debug ? global::NLog.LogLevel.Debug
: logLevel == LogLevel.Verbose ? global::NLog.LogLevel.Trace
: logLevel == LogLevel.Critical ? global::NLog.LogLevel.Fatal
: logLevel == LogLevel.Error ? global::NLog.LogLevel.Error
: logLevel == LogLevel.Information ? global::NLog.LogLevel.Info
: logLevel == LogLevel.Warning ? global::NLog.LogLevel.Warn
: global::NLog.LogLevel.Off;
LogManager.GetCurrentClassLogger().Log(ll,formatter(state,exception));
}
public bool IsEnabled(LogLevel logLevel)
{
return true;
}
public IDisposable BeginScopeImpl(object state)
{
return new Disposable(() => { });
}
}
public class NLogLoggerProvider : ILoggerProvider
{
public void Dispose()
{
}
public ILogger CreateLogger(string categoryName)
{
return new NLogLogger();
}
}
public void Configure(IApplicationBuilder app,IHostingEnvironment env,ILoggerFactory loggerFactory)
{
loggerFactory.AddProvider(new NLogLoggerProvider());
..
}
BeginScopeImpl的实现似乎是一个黑客，但我不确定如何最好地实现它。
>这看起来像一个有效的实现选项吗？
>有没有更好的方法来实现BeginScopeImpl？
>还有另一种让NLog与ASP.NET 5一起工作的方法？
解决方法
Microsoft.Framework.Logging.NLog已被替换为
NLog.Extensions.Logging on NuGet，由NLog团队维护。
对于ASP.NET Core，您需要NLog.Web.AspNetCore(依赖于
NLog.Extensions.Logging)
如何使用：
public void Configure(IApplicationBuilder app,ILoggerFactory loggerFactory)
{
//add NLog to .NET Core
loggerFactory.AddNLog();
//Enable ASP.NET Core features (NLog.web) - only needed for ASP.NET Core users
app.AddNLogWeb();
//needed for non-NETSTANDARD platforms: configure nlog.config in your project root. NB: you need NLog.Web.AspNetCore package for this.
env.ConfigureNLog("nlog.config");
...
//you could use LogManager.Configuration from here
public void ConfigureServices(IServiceCollection services)
{
// Add framework services.
// e.g. services.AddMvc();
//needed for NLog.Web
services.AddSingleton<IHttpContextAccessor,HttpContextAccessor>();
}
示例如何配置，日志和过滤器，另请参见README.md in GitHub。
public class HomeController : Controller
{
protected ILogger Logger { get; }
public HomeController(ILoggerFactory loggerFactory,IServiceProvider serviceProvider)
{
Logger = loggerFactory.CreateLogger(GetType().Namespace);
Logger.LogInformation("created homeController");
}
配置：
<?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"
autoReload="true"
internalLogLevel="Warn"
internalLogFile="c:\temp\internal.txt">
<extensions>
<!--enable NLog.Web for ASP.NET Core-->
<add assembly="NLog.Web.AspNetCore"/>
</extensions>
<!-- define varIoUs log targets -->
<targets>
<!-- write logs to file -->
<target xsi:type="File" name="allfile" fileName="c:\temp\nlog-all-${shortdate}.log"
layout="${longdate}|${logger}|${uppercase:${level}}|${message} ${exception}" />
<target xsi:type="File" name="ownFile" fileName="c:\temp\nlog-own-${shortdate}.log"
layout="${longdate}|${logger}|${uppercase:${level}}|${message} ${exception}" />
<target xsi:type="Null" name="blackhole" />
</targets>
<rules>
<!--All logs,including from Microsoft-->
<logger name="*" minlevel="Trace" writeTo="allfile" />
<!--Skip Microsoft logs and so log only own logs-->
<logger name="Microsoft.*" minlevel="Trace" writeTo="blackhole" final="true" />
<logger name="*" minlevel="Trace" writeTo="ownFile" />
</rules>
</nlog>
“nlog-own-2016-02-14.log”包含：
2016-02-14 16:27:04.0547|aspnet5application.Controllers|INFO|created homeController
2016-02-14 16:27:04.0547|aspnet5application.Controllers|INFO|created homeController
干杯，
朱利安(NLog)
编辑：更新为NLog.Web.AspNetCore 4.3
