C# 带有自定义文件名的Log4net滚动文件 我们只想创建4个日志文件，若日志文件的数量增加，那个么最旧的日志文件应该被删除，其他日志文件将被重命名 每小时后，日志文件名应与前一小时相同 日后日志文件名应与前一天更改 和新文件名应始终相同

例如：

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现在，如果创建了新文件，则应删除最旧的文件，并重命名其他文件，如下所示

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现在如果小时发生更改，文件名应为（yyyyymmddhh），如下所示

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现在如果日期更改，文件名应为（yyyyMMdd），如下所示

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使用log4net如何实现这一点？

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提前感谢您

我们可以创建一个RollingFileAppender，每天备份文件，最多4个文件。我们可以配置为每天备份或每小时备份，但不能同时进行。根据您的要求更改

DatePattern

，下面是示例配置

 <appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
        <file value="log.txt" />
        <appendToFile value="true" />
         <rollingStyle value="Composite" />
        <datePattern value="yyyyMMdd" />
        <maxSizeRollBackups value="4" />
        <staticLogFileName value="true" />
        <layout type="log4net.Layout.PatternLayout">
            <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
        </layout>
    </appender>

Time 01-11-2019 10:20
Log file name - abc.log
Log file size - 11kb
old Log file name - abc.log.1
old Log file size - 10kb

Time 01-11-2019 10:45
Log file name - abc.log
Log file size - 12kb
old Log file name - abc.log.1
old Log file size - 11kb
old Log file name - abc.log.2
old Log file size - 10kb

Time 01-11-2019 10:50
Log file name - abc.log
Log file size - 13kb
old Log file name - abc.log.1
old Log file size - 12kb
old Log file name - abc.log.2
old Log file size - 11kb
old Log file name - abc.log.3
old Log file size - 10kb

Time 01-11-2019 10:55
Log file name - abc.log
Log file size - 14kb
old Log file name - abc.log.1
old Log file size - 13kb
old Log file name - abc.log.2
old Log file size - 12kb
old Log file name - abc.log.3
old Log file size - 11kb

(log file with size 10kb get deleted)

Time 01-11-2019 11.10
Log file name - abc.log
Log file size - 15kb
old Log file name - abc.log.2019110110.1
old Log file size - 14kb
old Log file name - abc.log.2019110110.2
old Log file size - 13kb
old Log file name - abc.log.2019110110.3
old Log file size - 12kb

(log file with size 11kb get deleted)

Time 02-11-2018 11.10
Log file name - abc.log
Log file size - 16kb
old Log file name - abc.log.20191101.1
old Log file size - 15kb
old Log file name - abc.log.20191101.2
old Log file size - 14kb
old Log file name - abc.log.20191101.3
old Log file size - 13kb

(log file with size 12kb get deleted)

 <appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
        <file value="log.txt" />
        <appendToFile value="true" />
         <rollingStyle value="Composite" />
        <datePattern value="yyyyMMdd" />
        <maxSizeRollBackups value="4" />
        <staticLogFileName value="true" />
        <layout type="log4net.Layout.PatternLayout">
            <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
        </layout>
    </appender>