log4net

http://www.cnblogs.com/zjfree/archive/2011/02/22/1961586.html

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：http://files.cnblogs.com/zjfree/ErrorLog.rar

环境：WIN2003 + VS2005 + C#