WinForm下使用 log4net

在C# winForm程序中添加log4net

1. 引用 log4net.dll

2. 添加 app.config 内容如下：

<?xml version="1.0" encoding="utf-8" ?>

<configuration>

    <log4net>

        <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">

            <param name="File" value="Log\Log.txt" />

            <param name="AppendToFile" value="true" />

            <param name="MaxSizeRollBackups" value="100" />

            <param name="MaximumFileSize" value="2MB" />

            <param name="RollingStyle" value="Size" />

            <param name="StaticLogFileName" value="true" />

            <layout type="log4net.Layout.PatternLayout">

                <param name="ConversionPattern" value="%-5p %d [%c] %m%n" />

            </layout>

        </appender>

        <root>

            <level value="all" />

            <appender-ref ref="RollingLogFileAppender" />

        </root>

    </log4net>

</configuration>

具体设置说明可在网上找。

3. 在 Properties/AssemblyInfo.cs 添加 [assembly: log4net.Config.DOMConfigurator(Watch=true)]

4. 在代码中添加日志

定义LOG private static log4net.ILog LOG = log4net.LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

写入日志 LOG.Info("窗体打开");

5. 如果要记录所有未处理异常，修改 Program.cs 如下 

using System;

using System.Collections.Generic;

using System.Windows.Forms;

using System.Reflection;

 

namespace ExceptionTest

{

    static class Program

    {

        static log4net.ILog LOG = log4net.LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

 

        /// <summary>

        /// 应用程序的主入口点。

        /// </summary>

        [STAThread]

        static void Main()

        {

            //捕获未处理异常

            Application.SetUnhandledExceptionMode(UnhandledExceptionMode.CatchException);

            Application.ThreadException += new System.Threading.ThreadExceptionEventHandler(Application_ThreadException);

            AppDomain.CurrentDomain.UnhandledException +=new UnhandledExceptionEventHandler(CurrentDomain_UnhandledException);

 

            Application.EnableVisualStyles();

            Application.SetCompatibleTextRenderingDefault(false);

            Application.Run(new Form1());

        }

 

        static void Application_ThreadException(object sender, System.Threading.ThreadExceptionEventArgs e)

        {

            LOG.Error(e.Exception);

            //throw new Exception("线程未知异常", e.Exception);

            MessageBox.Show(e.Exception.Message, "线程异常", MessageBoxButtons.OK, MessageBoxIcon.Error);

            Application.Exit();

        }

 

        static void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)

        {

            Exception ex = e.ExceptionObject as Exception;

            LOG.Error(ex);

            MessageBox.Show(ex.Message, "应用程序异常", MessageBoxButtons.OK, MessageBoxIcon.Error);

            Application.Exit();

        }

    }

}

在Asp.net 网站中添加log4net

1. 引用 log4net.dll

2. 配置Web.config 如下

<?xml version="1.0"?>

 

<configuration>

    <configSections>

        <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>

    </configSections>

    <appSettings/>

    <connectionStrings/>

    <system.web>

        <compilation debug="true"/>

        <authentication mode="Windows"/>

    </system.web>

 

    <!--日志-->

    <log4net>

        <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">

            <param name="File" value="D:\test\Log.txt" />

            <param name="AppendToFile" value="true" />

            <param name="MaxSizeRollBackups" value="100" />

            <param name="MaximumFileSize" value="2MB" />

            <param name="RollingStyle" value="Size" />

            <param name="StaticLogFileName" value="true" />

            <layout type="log4net.Layout.PatternLayout">

                <param name="ConversionPattern" value="%-5p %d [%c] %m%n" />

            </layout>

        </appender>

        <root>

            <level value="all" />

            <appender-ref ref="RollingLogFileAppender" />

        </root>

    </log4net>

</configuration>

3. 添加 Global.asax 内容如下：

private static log4net.ILog LOG = log4net.LogManager.GetLogger("Log4net 测试网站");

void Application_Start(object sender, EventArgs e)

{

    // 在应用程序启动时运行的代码

    log4net.Config.DOMConfigurator.Configure();

    LOG.Info("网站启动");

}

 

void Application_Error(object sender, EventArgs e)

{

    // 在出现未处理的错误时运行的代码

    Exception ex = HttpContext.Current.Server.GetLastError();

    LOG.Error("未处理异常", ex);

}

将站点的所有未处理异常记录到log4net中。

4. 如何使用

定义LOG private static log4net.ILog LOG = log4net.LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

写入日志 LOG.Info("网站启动");

示例代码下载

下载：https://files.cnblogs.com/zjfree/ErrorLog.rar