.NET CORE 日志系统

1.ILogger .NET CORE内置的日志服务
需要引入的NuGet包：Microsoft.Extensions.Logging、Microsoft.Extensions.Logging.Console、Microsoft.Extensions.DependencyInjection

 public class TestCon
    {
        private readonly ILogger<TestCon> logger;
        public TestCon(ILogger<TestCon> logger)
        {
            this.logger = logger;
        }
        public void Test()
        {
            logger.LogDebug("sssssssssss");
            logger.LogError("ssssssss");
            try
            {
                File.ReadAllText("c:/333.txt");
            }
            catch (Exception EX)
            {

                logger.LogError(EX, "读取文件失败");
            }
        }
    }

//Program中调用:

ServiceCollection services = new ServiceCollection();
services.AddLogging(builder => {
    builder.AddConsole();
});
services.AddScoped<TestCon>();

using(var scope = services.BuildServiceProvider())
{
   var SS=  scope.GetService<TestCon>();
    SS.Test();
}

2.NLOG的使用：
需要的NuGet包：NLog.Extensions.Logging
配置文件默认的名称为：nlog.config 配置文件可在官网下载
services.AddLogging(builder => {
builder.AddConsole();
builder.AddNLog();
});
//调用方式不变
3.NLOG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="Info"
      internalLogFile="logs/internal-nlog-AspNetCore.txt">
	<targets>
//archiveAboveSize  单文件最大多少字节 maxArchiveFiles：最多几个文件
		<target xsi:type="File" name="defaultFile" fileName="logs/log-${shortdate}.log"
				layout="${longdate}|${level:uppercase=true}|${logger}|${message} ${exception:format=tostring}" />
		<target xsi:type="File" name="sysServiceFile" fileName="logs/sysServiceFile-${shortdate}.log"
						layout="${longdate}|${level:uppercase=true}|${logger}|${message} ${exception:format=tostring}" archiveAboveSize="10000" maxArchiveFiles="8" />
		<target xsi:type="Console" name="lifetimeConsole" layout="${longdate}|${level:uppercase=true}|${logger}|${message} ${exception:format=tostring}"  />
	</targets>
	<rules>
		<logger name="*" minlevel="Warn" maxlevel="Fatal" writeTo="lifetimeConsole" />
                //SystemServices下的类使用sysServiceFile这个target进行记录 最小级别是Trance  final：如果匹配到这项规则就终止
		<logger name="SystemServices.*" minlevel="Trace" writeTo="sysServiceFile" final="true" />
		<logger name="*" minlevel="Trace" writeTo="defaultFile" />
	</rules>
</nlog>