.NET Core use NLog

Nlog 实现了 Microsoft.Extensions.Logging.ILogger。

首先Nuget下载添加引用:NLog.Extensions.Logging

在添加NLog的配置文件“NLog.Config” 到项目,内容如下:

<?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="logfile" xsi:type="File" fileName="Log/log.txt" />
    <target name="console" xsi:type="Console" />
  </targets>

  <rules>
    <logger name="*" minlevel="Info" writeTo="logfile" />
    <logger name="*" minlevel="Info" writeTo="console" />
  </rules>
</nlog>

 

在:Program 类(我这个是Console程序)修改:

 public static IHostBuilder CreateHostBuilder(string[] args) =>

          Host.CreateDefaultBuilder(args).ConfigureLogging(logging =>
          {
              logging.ClearProviders();
              logging.AddNLog();
              logging.SetMinimumLevel(Microsoft.Extensions.Logging.LogLevel.Trace);
          })
         .ConfigureServices((hostContext, services) =>
         {
             services.AddHostedService<DataService>();
         });

  

在用的地方注入Microsoft.Extensions.Logging.ILogger:

       private Microsoft.Extensions.Logging.ILogger<DataService> _logger;
        public DataService(ILogger<DataService> logger) {
            _logger = logger;
        }

        protected  void Test()
        {
         
                _logger.LogError("test.........");

  

最后会在 Log/log.txt 记录日志输出信息。

 

另外可以定义为 NLog.ILogger _logger;

可惜的是NLog没有NLog.ILogger<T>这种形式!!!!

也不能直接注入NLog.ILogger,会报 ‘Unable to resolve service for type ‘NLog.ILogger‘ while attempting to activate 。

可以这样:

 private readonly Logger _logger;
 public DataService()
       {
        
            _logger = LogManager.GetCurrentClassLogger();
        }

  

 

.NET Core use NLog

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