C# Log4Net：以编程方式指定多个记录器（具有多个文件附加器）
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原文地址: http://stackoverflow.com/questions/308436/
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Log4Net: Programmatically specify multiple loggers (with multiple file appenders)
提问by Jox
How to (programmatically, without xml config) configure multiple loggers with Log4Net? I need them to write to different files.
如何（以编程方式，无需 xml 配置）使用 Log4Net 配置多个记录器？我需要它们写入不同的文件。
采纳答案by Blair Conrad
This thread at the log4net Dashboard details an approach.
To summarize a little, hopefully without ripping off too much code:
总结一下，希望不要扯掉太多代码：
using log4net;
using log4net.Appender;
using log4net.Layout;
using log4net.Repository.Hierarchy;
// Set the level for a named logger
public static void SetLevel(string loggerName, string levelName)
{
ILog log = LogManager.GetLogger(loggerName);
Logger l = (Logger)log.Logger;
l.Level = l.Hierarchy.LevelMap[levelName];
}
// Add an appender to a logger
public static void AddAppender(string loggerName, IAppender appender)
{
ILog log = LogManager.GetLogger(loggerName);
Logger l = (Logger)log.Logger;
l.AddAppender(appender);
}
// Create a new file appender
public static IAppender CreateFileAppender(string name, string fileName)
{
FileAppender appender = new
FileAppender();
appender.Name = name;
appender.File = fileName;
appender.AppendToFile = true;
PatternLayout layout = new PatternLayout();
layout.ConversionPattern = "%d [%t] %-5p %c [%x] - %m%n";
layout.ActivateOptions();
appender.Layout = layout;
appender.ActivateOptions();
return appender;
}
// In order to set the level for a logger and add an appender reference you
// can then use the following calls:
SetLevel("Log4net.MainForm", "ALL");
AddAppender("Log4net.MainForm", CreateFileAppender("appenderName", "fileName.log"));
// repeat as desired
回答by Narottam Goyal
using System;
using Com.Foo;
using System.Collections.Generic;
using System.Text;
using log4net.Config;
using log4net;
using log4net.Appender;
using log4net.Layout;
using log4net.Repository.Hierarchy;
public class MyApp
{
public static void SetLevel(string loggerName, string levelName)
{
ILog log = LogManager.GetLogger(loggerName);
Logger l = (Logger)log.Logger;
l.Level = l.Hierarchy.LevelMap[levelName];
}
// Add an appender to a logger
public static void AddAppender(string loggerName, IAppender appender)
{
ILog log = LogManager.GetLogger(loggerName);
Logger l = (Logger)log.Logger;
l.AddAppender(appender);
}
// Add an appender to a logger
public static void AddAppender2(ILog log, IAppender appender)
{
// ILog log = LogManager.GetLogger(loggerName);
Logger l = (Logger)log.Logger;
l.AddAppender(appender);
}
// Create a new file appender
public static IAppender CreateFileAppender(string name, string fileName)
{
FileAppender appender = new
FileAppender();
appender.Name = name;
appender.File = fileName;
appender.AppendToFile = true;
PatternLayout layout = new PatternLayout();
layout.ConversionPattern = "%d [%t] %-5p %c [%logger] - %m%n";
layout.ActivateOptions();
appender.Layout = layout;
appender.ActivateOptions();
return appender;
}
private static readonly ILog log = LogManager.GetLogger(typeof(MyApp));
static void Main(string[] args)
{
BasicConfigurator.Configure();
SetLevel("Log4net.MainForm", "ALL");
AddAppender2(log, CreateFileAppender("appenderName", "fileName.log"));
log.Info("Entering application.");
Console.WriteLine("starting.........");
log.Info("Entering application.");
Bar bar = new Bar();
bar.DoIt();
Console.WriteLine("starting.........");
log.Error("Exiting application.");
Console.WriteLine("starting.........");
}
}
namespace Com.Foo
{
public class Bar
{
private static readonly ILog log = LogManager.GetLogger(typeof(Bar));
public void DoIt()
{
log.Debug("Did it again!");
}
}
}
回答by G.Y
I Hope this helps, it configures a simple console logger.
我希望这会有所帮助，它配置了一个简单的控制台记录器。
static void Main(string[] args)
{
const string logLayoutPattern =
"[%date %timestamp][%level] %message %newline" +
"Domain: %appdomain, User: %username %identity %newline" +
"%stacktracedetail{10} %newline" +
"%exception %newline";
var wrapperLogger = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
var logger = (Logger) wrapperLogger.Logger;
logger.Hierarchy.Root.Level = Level.All;
var consoleAppender = new ConsoleAppender
{
Name = "ConsoleAppender",
Layout = new PatternLayout(logLayoutPattern)
};
logger.Hierarchy.Root.AddAppender(consoleAppender);
logger.Hierarchy.Configured = true;
wrapperLogger.Debug("Hello");
Console.ReadKey();
}
回答by pasx
I mixed together the code from Blair Conrad's answer and the code from Philipp M on this post:
我在这篇文章中将 Blair Conrad 的回答中的代码和 Philipp M 的代码混合在一起：
I compiled the result into a dll that I reference in my projects and call like this, usually on the first line of the main program:
我将结果编译成我在项目中引用的 dll 并像这样调用，通常在主程序的第一行：
public static Log = new Log4NetWrapper.LogWrapper().Setup(@"c:\myLog.log", "TestLog");
Here is the code in the DLL:
这是DLL中的代码：
public class LogWrapper
{
public ILog Setup(string logFilePath, string logName, string maxFileSize = "10MB")
{
var patternLayout = new PatternLayout();
patternLayout.ConversionPattern = "%date [%thread] %-5level %logger - %message%newline";
patternLayout.ActivateOptions();
var roller = new RollingFileAppender();
roller.AppendToFile = true;
roller.File = logFilePath;
roller.Layout = patternLayout;
roller.MaxSizeRollBackups = 5;
roller.MaximumFileSize = maxFileSize;
roller.RollingStyle = RollingFileAppender.RollingMode.Size;
roller.StaticLogFileName = true;
roller.ActivateOptions();
//hierarchy.Root.AddAppender(roller);
var memory = new MemoryAppender();
memory.ActivateOptions();
ILog log = LogManager.GetLogger(logName);
var l = (Logger)log.Logger;
l.AddAppender(roller);
l.AddAppender(memory);
l.Level = l.Hierarchy.LevelMap["Debug"];
l.Repository.Configured = true;
return log;
}
}
One could of course add parameters as needed to the constructor or create overrides.
当然，可以根据需要向构造函数添加参数或创建覆盖。
