C# Log4net使用

1.在项目中安装log4net 包

 2.增加配置文件：

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <configuration>
 3     <configSections>
 4         <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net" />
 5     </configSections>
 6     <log4net>
 7         <logger name="run">
 8             <appender-ref ref="MessageAppender" />
 9         </logger>
10         <appender name="MessageAppender" type="log4net.Appender.RollingFileAppender">
11             <param name="Encoding" value="utf-8" />
12             <file value=".\logs\RunLog\" />
13             <appendToFile value="true" />
14             <maxSizeRollBackups value="24" />
15             <maximumFileSize value="100MB" />
16             <rollingStyle velue="Date" />
17             <datePattern value="yyyy-MM-dd-HH&quot;.txt&quot;" />
18             <staticLogFileName value="false" />
19             <layout type="log4net.Layout.PatternLayout">
20                 <conversionPattern value="%date{yyyy-MM-dd HH:mm:ss fff}$%-5level%message%newline" />
21             </layout>
22         </appender>
23         <logger name="error_record">
24             <appender-ref ref="ErrorRecordAppender" />
25         </logger>
26         <appender name="ErrorRecordAppender" type="log4net.Appender.RollingFileAppender">
27             <param name="Encoding" value="utf-8" />
28             <file value=".\logs\ErrorRecord\" />
29             <appendToFile value="true" />
30             <maxSizeRollBackups value="24" />
31             <maximumFileSize value="500MB" />
32             <rollingStyle velue="Date" />
33             <datePattern value="yyyy-MM-dd-HH&quot;.txt&quot;" />
34             <staticLogFileName value="false" />
35             <layout type="log4net.Layout.PatternLayout">
36                 <conversionPattern value="%date{yyyy-MM-dd HH:mm:ss};%message%newline" />
37             </layout>
38         </appender>
39         <logger name="operation">
40             <appender-ref ref="OperationAppender" />
41         </logger>
42         <appender name="OperationAppender" type="log4net.Appender.RollingFileAppender">
43             <param name="Encoding" value="utf-8" />
44             <file value=".\logs\OperationLog\" />
45             <appendToFile value="true" />
46             <maxSizeRollBackups value="24" />
47             <maximumFileSize value="100MB" />
48             <rollingStyle velue="Date" />
49             <datePattern value="yyyy-MM-dd&quot;.txt&quot;" />
50             <staticLogFileName value="false" />
51             <layout type="log4net.Layout.PatternLayout">
52                 <conversionPattern value="%date{HH:mm:ss fff}$%-5level$%message$%newline" />
53             </layout>
54         </appender>
55         <logger name="webapi">
56             <appender-ref ref="webAppender" />
57         </logger>
58         <appender name="webAppender" type="log4net.Appender.RollingFileAppender">
59             <param name="Encoding" value="utf-8" />
60             <file value=".\logs\WebApi\" />
61             <appendToFile value="true" />
62             <maxSizeRollBackups value="24" />
63             <maximumFileSize value="100MB" />
64             <rollingStyle velue="Date" />
65             <datePattern value="yyyy-MM-dd&quot;.txt&quot;" />
66             <staticLogFileName value="false" />
67             <layout type="log4net.Layout.PatternLayout">
68                 <conversionPattern value="%date{HH:mm:ss fff}$%-5level$%message$%newline" />
69             </layout>
70         </appender>
71     </log4net>
72 </configuration>

3.将该配置文件设置为【始终复制】：

 4.在程序中启动入口加载:

 1   private static readonly ILog log = LogManager.GetLogger("run");
 2   /// <summary>
 3   /// 应用程序的主入口点。
 4   /// </summary>
 5   [STAThread]
 6   static void Main()
 7   {
 8       var path = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "log4Net.config");
 9       XmlConfigurator.Configure(new FileInfo(path));
10       Application.SetUnhandledExceptionMode(UnhandledExceptionMode.CatchException);
11       Application.ThreadException += Application_ThreadException;
12       AppDomain.CurrentDomain.UnhandledException += CurrentDomain_UnhandledException;
13       Application.EnableVisualStyles();
14       Application.SetCompatibleTextRenderingDefault(false); 
15       Application.Run(new HELLERMonitor1());
16   }
17 
18   private static void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)
19   {
20       log.Error(e);
21   }
22 
23   private static void Application_ThreadException(object sender, ThreadExceptionEventArgs e)
24   {
25       log.Error(e);
26   }

5.在项目中根据日志分类调用输出：

1    private static readonly ILog log = LogManager.GetLogger("run");
2    public Form1()
3    {
4        InitializeComponent();
5        log.Debug("程序运行中。。。");
6    }

6.查看运行结果：