C# 在log4net中以编程方式更改日志级别？
有没有办法以编程方式在log4net中设置日志级别？我以为会有一处房产让你这么做，但我似乎找不到 我想做的是有一个进入调试模式的可配置选项。这将导致额外的日志记录 我使用一个单独的log4net配置xml文件。目前，我提出的解决方案如下：C# 在log4net中以编程方式更改日志级别？,c#,log4net,C#,Log4net,有没有办法以编程方式在log4net中设置日志级别？我以为会有一处房产让你这么做，但我似乎找不到 我想做的是有一个进入调试模式的可配置选项。这将导致额外的日志记录 我使用一个单独的log4net配置xml文件。目前，我提出的解决方案如下： 使用dom编辑日志文件，然后调用XMLConfigurator根据该文件配置日志文件 有两个日志配置文件，并在选项更改时调用xml Configurator以使用适当的日志配置文件 我倾向于使用2，这有什么原因不起作用吗？这是我以编程方式配置log4net的方
我倾向于使用2，这有什么原因不起作用吗？这是我以编程方式配置log4net的方式：
//declared as a class variable
private static readonly ILog logger = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
PatternLayout layout = new PatternLayout(@"%date %-5level %message%newline");
RollingFileAppender appender = new RollingFileAppender();
appender.Layout = layout;
appender.File = "c:\log.txt";
appender.AppendToFile = true;
appender.MaximumFileSize = "1MB";
appender.MaxSizeRollBackups = 0; //no backup files
appender.Threshold = Level.Error;
appender.ActivateOptions();
log4net.Config.BasicConfigurator.Configure(appender);
log4net有很多很好的配置示例。您可以通过编程更改log4net记录器的日志记录级别，但如何更改日志记录级别并不明显。我有一些代码可以做到这一点。考虑到这个记录器：
private readonly log4net.ILog mylogger;
((log4net.Repository.Hierarchy.Logger)mylogger.Logger).Level = log4net.Core.Level.Debug;
这是你对米奇回答的后续评论 虽然您可以通过编程设置级别，但为什么不将日志级别设置为debug呢？这样，您的用户就不必担心将日志级别设置为debug，相信我，当您需要时，它永远不会打开 然后，当出现错误时，只需让用户向您发送完整的日志文件，并使用日志查看器之类的工具，有选择地仅查看您希望查看的级别
另一种解决方案是将不同的级别记录到不同的文件中。通过这种方式，您可以让用户只向您发送您想要查看的级别。您可以从下面下载示例项目或复制粘贴代码。 代码末尾是保存日志信息的表的DDL SQL
using System;
using System.Collections.Generic;
using System.Text;
using log4net;
using log4net.Config;
using NUnit.Framework;
using GenApp.Utils;
namespace ExampleConsoleApplication
{
class TestClass
{
private static readonly ILog logger =
LogManager.GetLogger ( typeof ( TestClass ) );
static void Main ( string[] args )
{
TestClass objTestClass = new TestClass ();
//log4net.Appender.ColoredConsoleAppender.Colors.HighIntensity
GenApp.Bo.UserSettings us = new GenApp.Bo.UserSettings ();
GenApp.Bo.User userObj = new GenApp.Bo.User ()
{
UserSettings = us
};
userObj.UserSettings.LogLevel = 4;
#region SetDynamicallyLogLevel
Logger.Debug ( userObj, logger, " -- Debug msg -- " );
Logger.Info ( userObj, logger, " -- Info msg -- " );
Logger.Warn ( userObj, logger, " -- Warn msg -- " );
Logger.Error ( userObj, logger, " -- Error msg -- " );
Logger.Fatal ( userObj, logger, " -- Fatal msg -- " );
#endregion SetDynamicallyLogLevel
#region RemoveDynamicallyAppenders
Logger.SetThreshold ( "LogFileAppender", log4net.Core.Level.Off );
//and echo again
Logger.Debug ( userObj, logger, " -- Debug msg -- " );
Logger.Info ( userObj, logger, " -- Info msg -- " );
Logger.Warn ( userObj, logger, " -- Warn msg -- " );
Logger.Error ( userObj, logger, " -- Error msg -- " );
Logger.Fatal ( userObj, logger, " -- Fatal msg -- " );
#endregion RemoveDynamicallyAppenders
Console.WriteLine ( " END HIT A KEY TO EXIT " );
Console.ReadLine ();
} //eof method
} //eof class
} //eof namespace
/* App.config CopyPaste
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<section name="log4net"
type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
</configSections>
<log4net>
<appender name="LogFileAppender" type="log4net.Appender.FileAppender">
<param name="File" value="Program.log" />
<param name="AppendToFile" value="true" />
<layout type="log4net.Layout.PatternLayout">
<!--<param name="Header" value="======================================" />
<param name="Footer" value="======================================" />-->
<param name="ConversionPattern" value="%date{yyyy'.'MM'.'dd --- HH':'mm':'ss'.'fff} [%t] %-5p -- %m%n" />
</layout>
</appender>
<appender name="ColoredConsoleAppender" type="log4net.Appender.ColoredConsoleAppender">
<mapping>
<level value="ERROR" />
<foreColor value="Red" />
</mapping>
<mapping>
<level value="DEBUG" />
<foreColor value="HighIntensity" />
</mapping>
<mapping>
<level value="INFO" />
<foreColor value="Green" />
</mapping>
<mapping>
<level value="WARN" />
<foreColor value="Yellow" />
</mapping>
<mapping>
<level value="FATAL" />
<foreColor value="White" />
<backColor value="Red" />
</mapping>
<layout type="log4net.Layout.PatternLayout">
<!-- You could change here the date format -->
<conversionPattern value="%date{yyyy'.'MM'.'dd --- HH':'mm':'ss'.'fff} [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
<appender name="AdoNetAppender" type="log4net.Appender.AdoNetAppender">
<connectionType value="System.Data.SqlClient.SqlConnection, System.Data, Version=1.2.10.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
<connectionString value="data source=ysg;initial catalog=DBGA_DEV;integrated security=true;persist security info=True;" />
<commandText value="INSERT INTO [DBGA_DEV].[ga].[tb_Data_Log] ([Date],[Thread],[Level],[Logger],[Message]) VALUES (@log_date, @thread, @log_level, @logger, @message)" />
<parameter>
<parameterName value="@log_date" />
<dbType value="DateTime" />
<layout type="log4net.Layout.PatternLayout" value="%date{yyyy'.'MM'.'dd HH':'mm':'ss'.'fff}" />
</parameter>
<parameter>
<parameterName value="@thread" />
<dbType value="String" />
<size value="255" />
<layout type="log4net.Layout.PatternLayout" value="%thread" />
</parameter>
<parameter>
<parameterName value="@domainName" />
<dbType value="String" />
<size value="255" />
<layout type="log4net.Layout.PatternLayout" value="%user" />
</parameter>
<parameter>
<parameterName value="@log_level" />
<dbType value="String" />
<size value="50" />
<layout type="log4net.Layout.PatternLayout" value="%level" />
</parameter>
<parameter>
<parameterName value="@logger" />
<dbType value="String" />
<size value="255" />
<layout type="log4net.Layout.PatternLayout" value="%logger" />
</parameter>
<parameter>
<parameterName value="@message" />
<dbType value="String" />
<size value="4000" />
<layout type="log4net.Layout.PatternLayout" value="%message" />
</parameter>
</appender>
<root>
<level value="ALL" />
<appender-ref ref="LogFileAppender" />
<appender-ref ref="AdoNetAppender" />
<appender-ref ref="ColoredConsoleAppender" />
</root>
</log4net>
</configuration>
*/
#region TheReferencesInThecsprojFile
//<Reference Include="log4net, Version=1.2.10.0, Culture=neutral, PublicKeyToken=1b44e1d426115821, processorArchitecture=MSIL">
// <SpecificVersion>False</SpecificVersion>
// <HintPath>..\..\..\Log4Net\log4net-1.2.10\bin\net\2.0\release\log4net.dll</HintPath>
//</Reference>
//<Reference Include="nunit.framework, Version=2.4.8.0, Culture=neutral, PublicKeyToken=96d09a1eb7f44a77, processorArchitecture=MSIL" />
#endregion TheReferencesInThecsprojFile
namespace GenApp.Bo
{
public class User
{
public int LogLevel { get; set; }
public UserSettings UserSettings { get; set; }
} //eof class
public class UserSettings
{
public int LogLevel;
}
} //eof namespace
namespace GenApp.Utils
{
///<version> 1.1 </version>
///<author> Yordan Georgiev </author>
///<summary> Wrapper around log4net with dynamically adjustable verbosity</summary>
public class Logger
{
private static Logger inst = new Logger ();
public static Logger Inst ()
{
inst.ConfigureLogging ();
return inst;
}
public enum DebugLevel : int
{
Fatal_Msgs = 0,
Fatal_Error_Msgs = 1,
Fatal_Error_Warn_Msgs = 2,
Fatal_Error_Warn_Info_Msgs = 3,
Fatal_Error_Warn_Info_Debug_Msgs = 4
}
public static void Debug ( GenApp.Bo.User userObj, ILog logger, string msg )
{
DebugLevel debugLevel = (DebugLevel)userObj.UserSettings.LogLevel;
string strLogLevel = Logger.GetLogTypeString ( debugLevel );
inst.SetLogingLevel ( strLogLevel );
logger.Debug ( msg );
} //eof method
public static void Info ( GenApp.Bo.User userObj, ILog logger, string msg )
{
DebugLevel debugLevel = (DebugLevel)userObj.UserSettings.LogLevel;
string strLogLevel = Logger.GetLogTypeString ( debugLevel );
inst.SetLogingLevel ( strLogLevel );
logger.Info ( msg );
} //eof method
public static void Warn ( GenApp.Bo.User userObj, ILog logger, string msg )
{
DebugLevel debugLevel = (DebugLevel)userObj.UserSettings.LogLevel;
string strLogLevel = Logger.GetLogTypeString ( debugLevel );
inst.SetLogingLevel ( strLogLevel );
logger.Warn ( msg );
} //eof method
public static void Error ( GenApp.Bo.User userObj, ILog logger, string msg )
{
DebugLevel debugLevel = (DebugLevel)userObj.UserSettings.LogLevel;
string strLogLevel = Logger.GetLogTypeString ( debugLevel );
inst.SetLogingLevel ( strLogLevel );
logger.Error ( msg );
} //eof method
public static void Fatal ( GenApp.Bo.User userObj, ILog logger, string msg )
{
DebugLevel debugLevel = (DebugLevel)userObj.UserSettings.LogLevel;
string strLogLevel = Logger.GetLogTypeString ( debugLevel );
inst.SetLogingLevel ( strLogLevel );
logger.Fatal ( msg );
} //eof method
/// <summary>
/// Activates debug level
/// </summary>
/// <sourceurl>http://geekswithblogs.net/rakker/archive/2007/08/22/114900.aspx</sourceurl>
private void SetLogingLevel ( string strLogLevel )
{
this.ConfigureLogging ();
string strChecker = "WARN_INFO_DEBUG_ERROR_FATAL";
if (String.IsNullOrEmpty ( strLogLevel ) == true || strChecker.Contains ( strLogLevel ) == false)
throw new ArgumentOutOfRangeException ( " The strLogLevel should be set to WARN , INFO , DEBUG ," );
log4net.Repository.ILoggerRepository[] repositories = log4net.LogManager.GetAllRepositories ();
//Configure all loggers to be at the debug level.
foreach (log4net.Repository.ILoggerRepository repository in repositories)
{
repository.Threshold = repository.LevelMap[strLogLevel];
log4net.Repository.Hierarchy.Hierarchy hier = (log4net.Repository.Hierarchy.Hierarchy)repository;
log4net.Core.ILogger[] loggers = hier.GetCurrentLoggers ();
foreach (log4net.Core.ILogger logger in loggers)
{
( (log4net.Repository.Hierarchy.Logger)logger ).Level = hier.LevelMap[strLogLevel];
}
}
//Configure the root logger.
log4net.Repository.Hierarchy.Hierarchy h = (log4net.Repository.Hierarchy.Hierarchy)log4net.LogManager.GetRepository ();
log4net.Repository.Hierarchy.Logger rootLogger = h.Root;
rootLogger.Level = h.LevelMap[strLogLevel];
}
///<summary>
///0 -- prints only FATAL messages
///1 -- prints FATAL and ERROR messages
///2 -- prints FATAL , ERROR and WARN messages
///3 -- prints FATAL , ERROR , WARN and INFO messages
///4 -- prints FATAL , ERROR , WARN , INFO and DEBUG messages
///</summary>
private static string GetLogTypeString ( DebugLevel debugLevel )
{
string srtLogLevel = String.Empty;
switch (debugLevel)
{
case DebugLevel.Fatal_Msgs:
srtLogLevel = "FATAL";
break;
case DebugLevel.Fatal_Error_Msgs:
srtLogLevel = "ERROR";
break;
case DebugLevel.Fatal_Error_Warn_Msgs:
srtLogLevel = "WARN";
break;
case DebugLevel.Fatal_Error_Warn_Info_Msgs:
srtLogLevel = "INFO";
break;
case DebugLevel.Fatal_Error_Warn_Info_Debug_Msgs:
srtLogLevel = "DEBUG";
break;
default:
srtLogLevel = "FATAL";
break;
} //eof switch
return srtLogLevel;
} //eof GetLogTypeString
/// <summary>
/// The path where the configuration is read from.
/// This value is set upon a call to ConfigureLogging().
/// </summary>
private string configurationFilePath;
public void ConfigureLogging ()
{
lock (this)
{
bool configured = false;
#region ConfigureByThePathOfTheEntryAssembly
// Tells the logging system the correct path.
Assembly a = Assembly.GetEntryAssembly ();
if (a != null && a.Location != null)
{
string path = a.Location + ".config";
if (File.Exists ( path ))
{
log4net.Config.DOMConfigurator.Configure (
new FileInfo ( path ) );
configurationFilePath = path;
configured = true;
}
else
{
path = FindConfigInPath ( Path.GetDirectoryName ( a.Location ) );
if (File.Exists ( path ))
{
log4net.Config.DOMConfigurator.Configure (
new FileInfo ( path ) );
configurationFilePath = path;
configured = true;
}
}
}
#endregion ConfigureByThePathOfTheEntryAssembly
#region ConfigureByWeb.config
//// Also, try web.config.
//if (!configured)
//{
// if (HttpContext.Current != null &&
// HttpContext.Current.Server != null &&
// HttpContext.Current.Request != null)
// {
// string path = HttpContext.Current.Server.MapPath (
// HttpContext.Current.Request.ApplicationPath );
// path = path.TrimEnd ( '\\' ) + "\\Web.config";
// if (File.Exists ( path ))
// {
// log4net.Config.DOMConfigurator.Configure (
// new FileInfo ( path ) );
// configurationFilePath = path;
// configured = true;
// }
// }
//}
#endregion ConfigureByWeb.config
#region ConfigureByThePathOfTheExecutingAssembly
if (!configured)
{
// Tells the logging system the correct path.
a = Assembly.GetExecutingAssembly ();
if (a != null && a.Location != null)
{
string path = a.Location + ".config";
if (File.Exists ( path ))
{
log4net.Config.DOMConfigurator.Configure (
new FileInfo ( path ) );
configurationFilePath = path;
configured = true;
}
else
{
path = FindConfigInPath ( Path.GetDirectoryName ( a.Location ) );
if (File.Exists ( path ))
{
log4net.Config.DOMConfigurator.Configure (
new FileInfo ( path ) );
configurationFilePath = path;
configured = true;
}
}
}
}
#endregion ConfigureByThePathOfTheExecutingAssembly
#region ConfigureByThePathOfTheCallingAssembly
if (!configured)
{
// Tells the logging system the correct path.
a = Assembly.GetCallingAssembly ();
if (a != null && a.Location != null)
{
string path = a.Location + ".config";
if (File.Exists ( path ))
{
log4net.Config.DOMConfigurator.Configure (
new FileInfo ( path ) );
configurationFilePath = path;
configured = true;
}
else
{
path = FindConfigInPath ( Path.GetDirectoryName ( a.Location ) );
if (File.Exists ( path ))
{
log4net.Config.DOMConfigurator.Configure (
new FileInfo ( path ) );
configurationFilePath = path;
configured = true;
}
}
}
}
#endregion ConfigureByThePathOfTheCallingAssembly
#region ConfigureByThePathOfTheLibIsStored
if (!configured)
{
// Look in the path where this library is stored.
a = Assembly.GetAssembly ( typeof ( Logger ) );
if (a != null && a.Location != null)
{
string path = FindConfigInPath ( Path.GetDirectoryName ( a.Location ) );
if (File.Exists ( path ))
{
log4net.Config.DOMConfigurator.Configure (
new FileInfo ( path ) );
configurationFilePath = path;
configured = true;
}
}
}
#endregion ConfigureByThePathOfTheLibIsStored
} //eof lock
} //eof method
/// <summary>
/// Searches for a configuration file in the given path.
/// </summary>
private string FindConfigInPath (
string path )
{
string[] files = Directory.GetFiles ( path );
if (files != null && files.Length > 0)
{
foreach (string file in files)
{
if (Path.GetExtension ( file ).Trim ( '.' ).ToLower (
CultureInfo.CurrentCulture ) == "config")
{
return file;
}
}
}
// Not found.
return string.Empty;
} //eof method
/// <summary>
/// Remove dynamically appenders
/// </summary>
/// <param name="appenderName"></param>
/// <param name="threshold"></param>
public static void SetThreshold ( string appenderName, Level threshold )
{
foreach (AppenderSkeleton appender in LogManager.GetRepository ().GetAppenders ())
{
if (appender.Name == appenderName)
{
appender.Threshold = threshold;
appender.ActivateOptions ();
break;
}
}
} //eof method
} //eof class
} //eof namespace
USE [DBGA_DEV]
GO
/****** Object: Table [ga].[tb_Data_Log] Script Date: 05/20/2009 12:16:01 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
CREATE TABLE [ga].[tb_Data_Log](
[ID] [int] IDENTITY(1,1) NOT NULL,
[Date] [datetime] NOT NULL,
[Thread] [varchar](255) NOT NULL,
[Level] [varchar](20) NOT NULL,
[Logger] [varchar](255) NOT NULL,
[Message] [varchar](4000) NOT NULL
) ON [PRIMARY]
GO
SET ANSI_PADDING ON
GO
使用系统；
使用System.Collections.Generic；
使用系统文本；
使用log4net；
使用log4net.Config；
使用NUnit.Framework；
使用GenApp.Utils；
命名空间示例控制台应用程序
{
类TestClass
{
专用静态只读ILog记录器=
LogManager.GetLogger（typeof（TestClass））；
静态void Main（字符串[]参数）
{
TestClass-objTestClass=newtestclass（）；
//log4net.Appender.ColoredConsoleAppender.Colors.HighIntensity
GenApp.Bo.UserSettings us=new GenApp.Bo.UserSettings（）；
GenApp.Bo.User userObj=新建GenApp.Bo.User（）
{
UserSettings=us
};
userObj.UserSettings.LogLevel=4；
#区域集DynamicAllyLevel
Debug（userObj，Logger，“--Debug msg-->”；
Info（userObj，Logger，“--Info msg-->”；
Logger.Warn（userObj，Logger，“--Warn msg-->”）；
Logger.Error（userObj，Logger，“--Error msg--”；
Logger.Fatal（userObj，Logger，“--Fatal msg--”；
#endregion SetDynamicallyLogLevel
#动态移除的区域出现
Logger.SetThreshold（“LogFileAppender”，log4net.Core.Level.Off）；
//再回音
Debug（userObj，Logger，“--Debug msg-->”；
Info（userObj，Logger，“--Info msg-->”；
Logger.Warn（userObj，Logger，“--Warn msg-->”）；
Logger.Error（userObj，Logger，“--Error msg--”；
Logger.Fatal（userObj，Logger，“--Fatal msg--”；
#动态移除的末端区域出现
Console.WriteLine（“结束按一个键退出”）；
Console.ReadLine（）；
}//eof方法
}//eof类
}//eof名称空间
/*App.config复制粘贴
*/
#ECSProject文件中的区域引用
//
//假的
//..\..\..\Log4Net\Log4Net-1.2.10\bin\net\2.0\release\Log4Net.dll
//
//
#endregion TheReferencesintheECSProject文件
名称空间GenApp.Bo
{
公共类用户
{
public int LogLevel{get；set；}
公共用户设置用户设置{get；set；}
}//eof类
公共类用户设置
{
公共服务水平；
}
}//eof名称空间
命名空间GenApp.Utils
{
/// 1.1
///约丹·乔治耶夫
///log4net的包装器，详细程度可动态调整
公共类记录器
{
专用静态记录器inst=新记录器（）；
公共静态记录器仪器（）
{
inst.ConfigureLogging（）；
返回仪表；
}
公共枚举调试级别：int
{
致命的_Msgs=0，
致命错误\u Msgs=1，
致命错误警告Msgs=2，
致命错误警告信息Msgs=3，
致命错误警告信息调试Msgs=4
}
公共静态void调试（GenApp.Bo.User userObj、ILog记录器、字符串msg）
{
DebugLevel DebugLevel=（DebugLevel）userObj.UserSettings.LogLevel；
string strLogLevel=Logger.GetLogTypeString（debugLevel）；
仪器设置水平（标准水平）；
logger.Debug（msg）；
}//eof方法
公共静态无效信息（GenApp.Bo.User userObj、ILog记录器、字符串msg）
{
DebugLevel DebugLevel=（DebugLevel）userObj.UserSettings.LogLevel；
string strLogLevel=Logger.GetLogTypeString（debugLevel）；
仪器设置水平（标准水平）；
logger.Info（msg）；
}//eof方法
公共静态无效警告（GenApp.Bo.User userObj、ILog记录器、字符串消息）
{
调试级