log4net快速使用流程

以下内容大部分来自这里，对原作者流子表示感谢

1、Nuget安装，当前版本2.0.8

2、创建log4net.config文件，文件内容如下：

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
  </configSections>
  <log4net debug="true">
    <root>
      <level value="DEBUG" />
      <appender-ref ref="RollingLogFileAppender" />
      <appender-ref ref="ConsoleAppender" />
    </root>
    <appender name="ConsoleAppender"  type="log4net.Appender.ConsoleAppender" >
      <layout type="log4net.Layout.PatternLayout">
       <conversionPattern value="[%date] %level [%thread][%c{1}:%line] - %m%n" />
      </layout>
    </appender>
    <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender" >
      <param name="File" value="game" />
      <param name="DatePattern" value="'.'yyyy-MM-dd-HH'.log'" />
      <param name="AppendToFile" value="true" />
      <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="[%date] %level [%thread][%c{1}:%line] - %m%n" />
      </layout>
    </appender>
  </log4net>
</configuration>

注意：要在文件属性中将“复制到输出目录”选项设置为“如果较新则复制”

3、在文件AssemblyInfo.cs中加上：

[assembly: log4net.Config.XmlConfigurator(ConfigFile = "log4net.config", Watch = true)]

4、代码用法：

using log4net;
private static readonly ILog logger = LogManager.GetLogger(typeof(GameClient));
Thread.CurrentThread.Name = "main";//为了将主线程名与其他线程区别开
//初始化log4net
log4net.Config.XmlConfigurator.Configure();
logger.Debug("初始化连接开始");
logger.InfoFormat("测试日志 name={0}","client");

5、输出结果：

[2017-08-11 20:18:19,350] DEBUG [main][GameClient:24] - 初始化连接开始
[2017-08-11 20:18:19,363] DEBUG [main][GameClient:28] - 初始化连接完毕
[2017-08-11 20:18:19,364] INFO [main][SuperSocketDemo:35] - 测试日志 name=client

UPDAT：

不知道为什么代码不能编辑了，只能暂时放在下面。

如果需要通过DebugView这类的工具查看Trace信息，配置内容如下：

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
  </configSections>
  <log4net debug="true">
    <root>
      <level value="DEBUG" />
      <appender-ref ref="RollingLogFileAppender" />
      <appender-ref ref="ConsoleAppender" />
      <appender-ref ref="TraceAppender" />
    </root>
    <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender" >
      <param name="File" value="LoadOrderInterface.log" />
      <param name="DatePattern" value="'.'yyyy-MM-dd-HH'.log'" />
      <param name="AppendToFile" value="true" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="[%date] %level [%thread][%c{1}:%line] - %m%n" />
      </layout>
    </appender>
    <appender name="ConsoleAppender"  type="log4net.Appender.ConsoleAppender" >
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="[%date] %level [%thread][%c{1}:%line] - %m%n" />
      </layout>
    </appender>
    <appender name="TraceAppender" type="log4net.Appender.TraceAppender">
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date %level [%thread] %logger [%property{NDC}] - %message%newline" />
      </layout>
    </appender>
  </log4net>
</configuration>

Level定义记录的日志级别，表示要记录哪个级别以上的日志,级别由低往高依次是:
ALL
DEBUG
INFO
WARN
ERROR
FATAL
None