一 、配置
1.vs2019 創建一個.net core web程序，選擇webapi
2.項目中添加一個配置文件：添加--新建項--XML文件，命名為log4net.config
我使用的是log4net的RollingLogFileAppender，他的好處是按天記錄日志，一般日志記錄會選擇30天
<configuration>
<!-- This section contains the log4net configuration settings -->
<log4net>
<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
<!--文件位置-->
<file value="LogFile/" />
<!--附加文件-->
<appendToFile value="true" />
<!--按天記錄-->
<rollingStyle value="Date" />
<datePattern value="yyyyMMdd'.log'" />
<staticLogFileName value="false" />
<!--只記錄31天-->
<MaxSizeRollBackups value="31" />
<!--輸出格式-->
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
<!-- Setup the root category, add the appenders and set the default level -->
<root>
<level value="ALL" />
<appender-ref ref="RollingLogFileAppender" />
</root>
</log4net>
</configuration>
更多選項參考：http://logging.apache.org/log4net/release/config-examples.html
3.startup配置
public static ILoggerRepository repository { get; set; }
public Startup(IConfiguration configuration)
{
Configuration = configuration;
repository = LogManager.CreateRepository("NETCoreRepository");
XmlConfigurator.Configure(repository, new FileInfo("log4net.config"));
}
二、應用
public class ValuesController : ControllerBase
{
private log4net.ILog log = log4net.LogManager.GetLogger(Startup.repository.Name, typeof(ValuesController));
public ActionResult<string> Get(int id)
{
log.Info($"ValuesController-Get id:{id}");
return "value";
}
}