您可以在代码中配置log4net而不是使用配置文件吗？

Question

我理解为什么log4net使用app.config文件来设置日志记录 - 这样您就可以轻松更改信息的记录方式,而无需重新编译代码.但在我的情况下,我不想app.config用我的可执行文件打包文件.我不想修改我的日志记录设置.

有没有办法让我设置登录代码而不是使用app.config？

这是我的简单配置文件:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
  </configSections>
  <log4net>
    <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
      <file value="Logs\EventLog.txt" />
      <appendToFile value="false" />
      <rollingStyle value="Size" />
      <maxSizeRollBackups value="5" />
      <maximumFileSize value="1GB" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />
      </layout>
    </appender>
    <appender name="MemoryAppender" type="log4net.Appender.MemoryAppender">
    </appender>
    <root>
      <level value="Info" />
      <appender-ref ref="RollingLogFileAppender" />
      <appender-ref ref="MemoryAppender" />
    </root>
  </log4net>
</configuration>

编辑:

要完全清楚:我的目标是没有XML文件.甚至不是我变成流的嵌入式资源.我的目标是完全以编程方式定义记录器.只是好奇是否有可能,如果是这样,我可能会找到一个语法示例.

Answer 1

最终解决方案:₁

对于任何可能在未来偶然发现这一点的人来说,这就是我所做的.我在下面制作了静态类:

using log4net;
using log4net.Repository.Hierarchy;
using log4net.Core;
using log4net.Appender;
using log4net.Layout;

namespace Spectrum.Logging
{
    public class Logger
    {
        public static void Setup()
        {
            Hierarchy hierarchy = (Hierarchy)LogManager.GetRepository();

            PatternLayout patternLayout = new PatternLayout();
            patternLayout.ConversionPattern = "%date [%thread] %-5level %logger - %message%newline";
            patternLayout.ActivateOptions();

            RollingFileAppender roller = new RollingFileAppender();
            roller.AppendToFile = false;
            roller.File = @"Logs\EventLog.txt";
            roller.Layout = patternLayout;
            roller.MaxSizeRollBackups = 5;
            roller.MaximumFileSize = "1GB";
            roller.RollingStyle = RollingFileAppender.RollingMode.Size;
            roller.StaticLogFileName = true;            
            roller.ActivateOptions();
            hierarchy.Root.AddAppender(roller);

            MemoryAppender memory = new MemoryAppender();
            memory.ActivateOptions();
            hierarchy.Root.AddAppender(memory);

            hierarchy.Root.Level = Level.Info;
            hierarchy.Configured = true;
        }
    }
}

然后我所要做的就是用以下调用替换我调用XML文件的代码:

//XmlConfigurator.Configure(new FileInfo("app.config")); // Not needed anymore
Logger.Setup();

^{1 _{(这个答案被OP编辑成问题,我冒昧地把它作为社区答案,看这里为什么)}}

Answer 2

您也可以完全转义XML,我在这里编写了一个带有最少编程配置的示例.

简而言之,这就是您所需要的

var tracer = new TraceAppender();
var hierarchy = (Hierarchy)LogManager.GetRepository();
hierarchy.Root.AddAppender(tracer);
var patternLayout = new PatternLayout {ConversionPattern = "%m%n"};
patternLayout.ActivateOptions();
tracer.Layout = patternLayout;
hierarchy.Configured = true;

Answer 3

是的,您可以通过调用以下命令配置log4net:

log4net.Config.XmlConfigurator.Configure(XmlElement element)

请参阅log4net文档.

Answer 4

或者，您可以创建一个继承自 log4net.Config.ConfiguratorAttribute 的自定义属性，并在其中对您的配置进行硬编码：

using log4net.Appender;
using log4net.Config;
using log4net.Core;
using log4net.Layout;
using log4net.Repository;
using log4net.Repository.Hierarchy;
using System;
using System.Reflection;

namespace ConsoleApplication1
{
    [AttributeUsage(AttributeTargets.Assembly)]
    public class MyConfiguratorAttribute : ConfiguratorAttribute
    {
        public MyConfiguratorAttribute()
            : base(0)
        {
        }

        public override void Configure(Assembly sourceAssembly, ILoggerRepository targetRepository)
        {
            var hierarchy = (Hierarchy)targetRepository;
            var patternLayout = new PatternLayout();
            patternLayout.ConversionPattern = "%date [%thread] %-5level %logger - %message%newline";
            patternLayout.ActivateOptions();

            var roller = new RollingFileAppender();
            roller.AppendToFile = false;
            roller.File = @"Logs\EventLog.txt";
            roller.Layout = patternLayout;
            roller.MaxSizeRollBackups = 5;
            roller.MaximumFileSize = "1GB";
            roller.RollingStyle = RollingFileAppender.RollingMode.Size;
            roller.StaticLogFileName = true;
            roller.ActivateOptions();
            hierarchy.Root.AddAppender(roller);

            hierarchy.Root.Level = Level.Info;
            hierarchy.Configured = true;
        }
    }
}

然后将以下内容添加到 .cs 文件中：

[assembly: ConsoleApplication1.MyConfigurator]