将日志从log4net写入文件时遇到了一些麻烦。我似乎按照手册中的描述完成所有操作,但这不起作用。这是我的logging.config文件:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
</configSections>
<log4net>
<appender name="FileAppender" type="log4net.Appender.FileAppender">
<file value="log.txt" />
<appendToFile value="true" />
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %message%newline" />
</layout>
</appender>
</log4net>
</configuration>
请帮助一个实际有效的配置文件示例。
答案 0 :(得分:77)
以下是在Visual Studio 2012和.NET 4.5下将Log4Net添加到项目的完整分步指南。
在您的解决方案中添加新的C#控制台应用程序。
选择Tools >> Library Package Manager >> Manage NuGet Packages For Solution
并搜索log4net
。安装它,并选择要添加log4net引用的项目。
修改Program.cs
:
using System;
namespace Log4Net
{
class Program
{
private static readonly log4net.ILog log = log4net.LogManager.GetLogger
(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
static void Main(string[] args)
{
Console.WriteLine("Writing to \"log.txt\" in the same directory as the .exe file.\n");
log.Info("Info logging");
try
{
throw new Exception("Exception!");
}
catch (Exception e)
{
log.Error("This is my error", e);
}
Console.WriteLine("[any key to exit]");
Console.ReadKey();
}
}
}
}
log4.config
,右键点击并选择Properties
,然后选择Copy to Output Directory - Copy If Newer
。<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
</configSections>
<log4net>
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="log.txt" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="250KB" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
<root>
<level value="ALL" />
<appender-ref ref="RollingFileAppender" />
</root>
</log4net>
</configuration>
App.Config
,使其符合以下条件:<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
</startup>
<appSettings>
<add key="log4net.Config" value="log4.config"/>
<add key="log4net.Config.Watch" value="True"/>
<add key="log4net.Internal.Debug" value="False"/>
</appSettings>
</configuration>
运行程序并观察在输出log.txt
目录中创建的文件\bin\Debug\
:
2013-08-10 11:54:26,798 [10] INFO Log4Net.Program [(null)] - Info logging
2013-08-10 11:54:26,824 [10] ERROR Log4Net.Program [(null)] - This is my error
System.Exception: Exception!
at Log4Net.Program.Main(String[] args) in C:\Test\Log4Net\Program.cs:line 14
将来,如果您想将log4net
添加到其他项目,请选择Tools >> Library Package Manager >> Manage NuGet Packages For Solution
选择log4net
,然后点击Manage
,然后勾选您想要的项目将log4net
添加到。
答案 1 :(得分:41)
您似乎没有引用您的appender的<root>
元素:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
</configSections>
<log4net>
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="log.txt" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="250KB" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
<root>
<level value="INFO" />
<appender-ref ref="RollingFileAppender" />
</root>
</log4net>
</configuration>
答案 2 :(得分:18)
首次启动应用程序时是否调用了configure方法?
log4net.Config.XmlConfigurator.Configure();
如果是的话。你应该好。检查您正在编写的磁盘上的文件权限。
如果您需要,还可以启用log4net内部调试,以找出问题所在。
http://logging.apache.org/log4net/release/faq.html#troubleshooting
答案 3 :(得分:6)
您可以做两件事:
其一,如果你想使用一个单独的配置文件,通过在app.config文件中添加以下内容,它将自动配置日志记录。
<?xml version="1.0"?>
<configuration>
<appSettings>
<add key="log4net.Config" value="log4.config"/>
<add key="log4net.Config.Watch" value="True"/>
<add key="log4net.Internal.Debug" value="False"/>
</appSettings>
</configuration>
否则,您需要在应用程序的开头启动日志记录。
//Initiate logging based on web.config file
log4net.Config.XmlConfigurator.Configure();
// Create a logger for use in this class
log4net.ILog log4 = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
答案 4 :(得分:3)
优秀。答案是正确的......除了他们没有为我工作
搜索网并最终发现我在Assembly.cs中缺少以下行:
$ cat data.txt
a:23 b:25 c:76 d:45
a:21 b:24 c:25
a:20 d:52 e:75 f:75 g:52
...
(many lines)
...