Log4的使用

1

配置文件中

<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net"/>
</configSections>
<log4net>
<!--错误日志配置-->
<appender name="ErrorAppender" type="log4net.Appender.RollingFileAppender">
<param name="File" value="Log\LogError\"/>
<!--文件路径-->
<param name="AppendToFile" value="true"/>
<param name="MaxSizeRollBackups" value="100"/>
<param name="MaxFileSize" value="10240"/>
<param name="StaticLogFileName" value="false"/>
<param name="DatePattern" value="yyyyMMdd"/>
<param name="RollingStyle" value="Date"/>
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="%n异常时间：%d [%t] %n异常级别：%-5p %n异 常 类：%c [%x] %n%m %n "/>

</layout>

</appender>
<!--信息日志配置-->
<appender name="InfoAppender" type="log4net.Appender.RollingFileAppender">
<param name="File" value="Log\LogInfo\"/>
<!--文件路径-->
<param name="AppendToFile" value="true"/>
<param name="MaxFileSize" value="10240"/>
<param name="MaxSizeRollBackups" value="100"/>
<param name="StaticLogFileName" value="false"/>
<param name="DatePattern" value="yyyyMMdd"/>
<param name="RollingStyle" value="Date"/>
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="%n日志时间：%d [%t] %n日志级别：%-5p %n日 志 类：%c [%x] %n%m %n"/>
</layout>

</appender>
<!--控制台-->
<appender name="ConsoleAppender" type="log4net.Appender.ConsoleAppender">
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%5level [%thread] (%file:%line) - %message%newline"/>
</layout>
</appender>
<!--log4net.LogManager.GetLogger("logerror")用这个来选择这种类型-->
<logger name="logerror">
<level value="ERROR"/>
<appender-ref ref="ErrorAppender"/>
</logger>
<!--log4net.LogManager.GetLogger("loginfo")用这个来选择这种类型-->
<logger name="loginfo">
<level value="INFO"/>
<appender-ref ref="InfoAppender"/>
</logger>
<!--<root>
<level value="INFO"/>
<appender-ref ref="InfoAppender"/>
<appender-ref ref="ConsoleAppender"/>

</root>-->

</log4net>

2 添加一个类库

public class LogHelper
{
public static readonly log4net.ILog logerror = log4net.LogManager.GetLogger("logerror"); //选择<logger name="logerror">的配置

static LogHelper()
{
SetConfig();
}

/// <summary>
/// 默认配置。按配置文件
/// </summary>
public static void SetConfig()
{
log4net.Config.XmlConfigurator.Configure();
}

/// <summary>
/// 写日志。出错时会写入
/// </summary>
/// <param name="info"></param>
/// <param name="se"></param>
public static void WriteErrorLog(string info, Exception se)
{
if (logerror.IsErrorEnabled)
{
logerror.Error(info, se);
}
}

public static void WriteErrorLog(string info)
{
if (logerror.IsErrorEnabled)
{
logerror.Error(info);
}
}

/// <summary>
/// 记录信息日志
/// </summary>
/// <param name="info"></param>
public static void WriteInfoLog(string info)
{
if (logerror.IsErrorEnabled)
{
logerror.Info(info);
}
}

/// <summary>
/// 记录警告日志
/// </summary>
/// <param name="info"></param>
public static void WriteWarnLog(string info)
{
if (logerror.IsErrorEnabled)
{
logerror.Warn(info);
}
}
}

 3 实咧调用

protected void Page_Load(object sender, EventArgs e)
{
    LogHelper.WriteErrorLog("异常信息测试");
}