.net core 杂记：日记记录

asp.net core 有内置的log组件，遗憾的是看了微软官方文档，貌似无法直接将日志存于文件或数据库，只能由自己实现或引用第三方日志组件。

以下为nlog和log4net的使用记录

nlog使用

•  搜索添加nuget包

nlog
nlog.web.aspnetcore

• 新建一个xml文件，并改名为nlog.config

xml内容如下（可配置日志目录名称、输出格式）：

<?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="internal-nlog.txt">

  <!--define various log targets-->
  <targets>

    <!--write logs to file-->
    <target xsi:type="file" name="allfile" filename="logs/service-${shortdate}.log"
                 layout="${longdate}|${logger}|${uppercase:${level}}|${message} ${exception}" />

  </targets>

  <rules>
    <!--all logs, including from microsoft-->
    <logger name="*" minlevel="trace" writeto="allfile" />
  </rules>
</nlog>

•  将nlog.config设置输出到目录

• 在startup类中配置

需要引入命名空间：

using nlog.extensions.logging;

using nlog.web;

public void configure(iapplicationbuilder app, ihostingenvironment env, iloggerfactory loggerfactor)
{
    //使用nlog
    loggerfactor.addnlog();
    //引入配置文件
    env.configurenlog("nlog.config");
    if (env.isdevelopment())
    {
        app.usedeveloperexceptionpage();
    }
    else
    {
        app.useexceptionhandler("/error");
    }
    app.usestaticfiles();
    app.usecookiepolicy();

    app.usemvc();
}

• 代码中的使用

有两中方式如下：

1、注入形式

public class indexmodel : pagemodel
{
    private ilogger<indexmodel> _logger;
    public indexmodel(ilogger<indexmodel> logger)
    {
        _logger = logger;
    }
    public string customer { get; set; }
    public void onget()
    {
        _logger.logwarning("111111111111111111111");
        customer = "123456";
    }
}

2、获取实例形式

private static logger logger = logmanager.getcurrentclasslogger();
public static void main(string[] args)
{
    logger.error("22222222222222222222222222222");
    logger.info("333333333333333333333333333333");
}

 log4net

 log4net已支持net core，来看下在net core下是如何配置的，与之前的版本还是有一点的区别

• 使用惯例，引用nuget

log4net

• 新建配置文件

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <!-- this section contains the log4net configuration settings -->
  <log4net>
    <appender name="consoleappender" type="log4net.appender.consoleappender">
      <layout type="log4net.layout.patternlayout" value="%date [%thread] %-5level %logger - %message%newline" />
    </appender>

    <appender name="fileappender" type="log4net.appender.fileappender">
      <file value="log-file.log" />
      <appendtofile value="true" />
      <layout type="log4net.layout.patternlayout">
        <conversionpattern value="%date [%thread] %-5level %logger [%property{ndc}] - %message%newline" />
      </layout>
    </appender>

    <appender name="rollinglogfileappender" type="log4net.appender.rollingfileappender">
      <file value="logs/" /> 
      <appendtofile value="true" />
      <rollingstyle value="date" />
      <staticlogfilename value="false" />
      <datepattern value="yyyy-mm-dd'.log'" />
      <maxsizerollbackups value="7" />
      <maximumfilesize value="1mb" />
      <layout type="log4net.layout.patternlayout">
        <conversionpattern value="%date [%thread] %-5level %logger [%property{ndc}] - %message%newline" />
      </layout>
    </appender>

    <!-- setup the root category, add the appenders and set the default level -->
    <root>
      <level value="all" />
      <appender-ref ref="consoleappender" />
      <appender-ref ref="fileappender" />
      <appender-ref ref="rollinglogfileappender" />
    </root>

  </log4net>
</configuration>

配置文件的相关说明，可以查看另一篇文章 

• 在startup.cs中配置log4net

public static iloggerrepository repository { get; set; }

public startup(iconfiguration configuration)
{
    configuration = configuration;
    //log4net
    repository = logmanager.createrepository("netcorerepository");
    //指定配置文件
    xmlconfigurator.configure(repository, new fileinfo("log4net.config"));
}

 

•  controller中的使用

private ilog log = logmanager.getlogger(startup.repository.name, typeof(valuescontroller));

[httpget]
public actionresult<ienumerable<string>> get()
{
    log.info(1111111111111111111);
    return new string[] { "value1", "value2" };
}

 

• 控制台中的使用

iloggerrepository repository = logmanager.createrepository("netcorerepository");

xmlconfigurator.configure(repository, new fileinfo("log4net.config"));

ilog log = logmanager.getlogger(repository.name,"netcorelog4net");
 
log.info("test log");