【VS2022+ASP.Net Core+.net6】Log4net 配置和使用
【Log4net 配置和使用】
1 NuGet包引入:Log4Net、 Microsoft.Extensions.Logging.Log4Net.AspNetCore、System.Data.SqlClient
2 添加 log4net.config 配置文件
<?xml version="1.0" encoding="utf-8"?> <log4net> <!-- Define some output appenders --> <appender name="rollingAppender" type="log4net.Appender.RollingFileAppender"> <file value="log4net\log.txt" /> <!--追加日志内容--> <appendToFile value="true" /> <!--防止多线程时不能写Log,官方说线程非安全--> <lockingModel type="log4net.Appender.FileAppender+MinimalLock" /> <!--可以为:Once|Size|Date|Composite--> <!--Composite为Size和Date的组合--> <rollingStyle value="Composite" /> <!--当备份文件时,为文件名加的后缀--> <datePattern value="yyyyMMdd.TXT" /> <!--日志最大个数,都是最新的--> <!--rollingStyle节点为Size时,只能有value个日志--> <!--rollingStyle节点为Composite时,每天有value个日志--> <maxSizeRollBackups value="30" /> <!--可用的单位:KB|MB|GB--> <maximumFileSize value="3MB" /> <!--置为true,当前最新日志文件名永远为file节中的名字--> <!-- 当将日期作为日志文件的名字时,必须将staticLogFileName的值设置为false --> <staticLogFileName value="true" /> <!--输出级别在INFO和ERROR之间的日志--> <filter type="log4net.Filter.LevelRangeFilter"> <param name="LevelMin" value="ALL" /> <param name="LevelMax" value="FATAL" /> </filter> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%date [%thread] %-5level %logger - %message%newline"/> </layout> </appender> <!--SQL数据库--> <appender name="AdoNetAppender_SqlServer" type="log4net.Appender.AdoNetAppender"> <bufferSize value="1" /> <connectionType value="System.Data.SqlClient.SqlConnection, System.Data.SqlClient, Version=4.6.1.3, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" /> <connectionString value="data source=localhost;initial catalog=数据库名;integrated security=false;persist security info=True;User ID=账户;Password=密码" /> <commandText value="INSERT INTO Log4Net ([Date],[Thread],[Level],[Logger],[Message],[Exception]) VALUES (@log_date, @thread, @log_level, @logger, @message, @exception)" /> <parameter> <parameterName value="@log_date" /> <dbType value="DateTime" /> <layout type="log4net.Layout.RawTimeStampLayout" /> </parameter> <parameter> <parameterName value="@thread" /> <dbType value="String" /> <size value="255" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%thread" /> </layout> </parameter> <parameter> <parameterName value="@log_level" /> <dbType value="String" /> <size value="50" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%level" /> </layout> </parameter> <parameter> <parameterName value="@logger" /> <dbType value="String" /> <size value="255" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%logger" /> </layout> </parameter> <parameter> <parameterName value="@message" /> <dbType value="String" /> <size value="4000" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%message" /> </layout> </parameter> <parameter> <parameterName value="@exception" /> <dbType value="String" /> <size value="2000" /> <layout type="log4net.Layout.ExceptionLayout" /> </parameter> </appender> <root> <priority value="ALL"/> <!--日志级别(从低到高):ALL|DEBUG|INFO|WARN|ERROR|FATAL|OFF--> <level value="ALL"/> <appender-ref ref="rollingAppender" /> <!--SQL数据库--> <appender-ref ref="AdoNetAppender_SqlServer" /> </root> </log4net>
3 Program.cs中注册
4 构造函数中注入得到实例并写日志
使用实例写日志,日志示例:
运行后,写到文件中的日志,与数据库中的日志是一样的。
注:数据库脚本:
USE [数据库名] GO /****** Object: Table [dbo].[Log4Net] Script Date: 2022-02-22 00:48:20 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO CREATE TABLE [dbo].[Log4Net]( [Id] [int] IDENTITY(1,1) NOT NULL, [Date] [datetime] NULL, [Thread] [nvarchar](50) NULL, [Level] [nvarchar](50) NULL, [Logger] [nvarchar](50) NULL, [Message] [nvarchar](max) NULL, [Exception] [nvarchar](max) NULL, CONSTRAINT [PK_Log4Net] PRIMARY KEY CLUSTERED ( [Id] ASC )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] ) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY] GO
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