NLog文档说明了如何使用nlog.config
XML文件为.NET Core应用程序配置NLog。但是,我希望我的应用程序只有一个配置文件-appsettings.json
。对于.NET Framework应用程序,可以将NLog配置放在app.config
或web.config
中。是否可以以相同方式将NLog配置放入appsettings.json
?
例如,如何将这个配置示例从NLog documentation for ASP.NET Core 2放入appsettings.json
?
<?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="Info"
internalLogFile="c:\temp\internal-nlog.txt">
<!-- enable asp.net core layout renderers -->
<extensions>
<add assembly="NLog.Web.AspNetCore"/>
</extensions>
<!-- the targets to write to -->
<targets>
<!-- write logs to file -->
<target xsi:type="File" name="allfile" fileName="c:\temp\nlog-all-${shortdate}.log"
layout="${longdate}|${event-properties:item=EventId_Id}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}" />
<!-- another file log, only own logs. Uses some ASP.NET core renderers -->
<target xsi:type="File" name="ownFile-web" fileName="c:\temp\nlog-own-${shortdate}.log"
layout="${longdate}|${event-properties:item=EventId_Id}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}|url: ${aspnet-request-url}|action: ${aspnet-mvc-action}" />
</targets>
<!-- rules to map from logger name to target -->
<rules>
<!--All logs, including from Microsoft-->
<logger name="*" minlevel="Trace" writeTo="allfile" />
<!--Skip non-critical Microsoft logs and so log only own logs-->
<logger name="Microsoft.*" maxlevel="Info" final="true" /> <!-- BlackHole without writeTo -->
<logger name="*" minlevel="Trace" writeTo="ownFile-web" />
</rules>
</nlog>
最佳答案
是的,这是可能的,但是具有最低版本要求。您必须使用NLog.Extensions.Logging> = 1.5.0。请注意,对于ASP.NET Core应用程序,如果安装NLog.Web.AspNetCore> = 4.8.2,则将作为依赖项安装。
然后,您可以在NLog
中创建一个appsettings.json
部分,并使用以下代码加载它:
var config = new ConfigurationBuilder()
.SetBasePath(System.IO.Directory.GetCurrentDirectory())
.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true).Build();
NLog.Config.LoggingConfiguration nlogConfig = new NLogLoggingConfiguration(config.GetSection("NLog"));
例如,对于ASP.NET Core应用程序,您在
Main()
中的Program.cs
方法应如下所示:public static void Main(string[] args)
{
var config = new ConfigurationBuilder()
.SetBasePath(System.IO.Directory.GetCurrentDirectory())
.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true).Build();
LogManager.Configuration = new NLogLoggingConfiguration(config.GetSection("NLog"));
var logger = NLog.Web.NLogBuilder.ConfigureNLog(LogManager.Configuration).GetCurrentClassLogger();
try
{
logger.Debug("Init main");
CreateWebHostBuilder(args).Build().Run();
}
catch (Exception ex)
{
logger.Error(ex, "Stopped program because of exception");
}
finally {
LogManager.Shutdown();
}
}
可以使用
appsettings.json
中的以下设置来实现类似问题中的配置:"NLog":{
"internalLogLevel":"Info",
"internalLogFile":"c:\\temp\\internal-nlog.txt",
"extensions":{
"NLog.Web.AspNetCore":{
"assembly":"NLog.Web.AspNetCore"
}
},
"targets":{
"allfile":{
"type":"File",
"fileName":"c:\\temp\\nlog-all-${shortdate}.log",
"layout":"${longdate}|${event-properties:item=EventId_Id}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}"
},
"ownFile-web":{
"type":"File",
"fileName":"c:\\temp\\nlog-own-${shortdate}.log",
"layout":"${longdate}|${event-properties:item=EventId_Id}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}|url: ${aspnet-request-url}|action: ${aspnet-mvc-action}"
}
},
"rules":[
{
"logger":"*",
"minLevel":"Trace",
"writeTo":"allfile"
},
{
"logger":"Microsoft.*",
"maxLevel":"Info",
"final":"true"
},
{
"logger":"*",
"minLevel":"Trace",
"writeTo":"ownFile-web"
}
]
}
编辑:感谢Rolf Kristensen(他首先为NLog开发了此功能!)指出了此Wiki页面,并提供了有关此功能的更多文档:https://github.com/NLog/NLog.Extensions.Logging/wiki/Json-NLog-Config
关于asp.net-core - 如何使用appsettings.json而不是nlog.config文件在.NET Core中配置NLog?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/56246416/