Log4Net

# Log4Net
>i 第一步：添加nuget包
```bash
Install-Package log4net
Install-Package Microsoft.Extensions.Logging.Log4Net.AspNetCore
```
>i 第二步：添加log4net.Config文件
```xml
<?xml version="1.0" encoding="utf-8"?>
<log4net>
 
	<appender name="rollingAppender" type="log4net.Appender.RollingFileAppender">
		<file value="log4\app.log" />
	
		<appendToFile value="true" />
		<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
 
		
		
		<rollingStyle value="Composite" />
 
		
		<datePattern value="yyyyMMdd.TXT" />
 
		
		
		
		<maxSizeRollBackups value="20" />
 
		
		<maximumFileSize value="3MB" />
 
		
		<staticLogFileName value="true" />
 
		
		<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>
 
		<layout type="log4net.Layout.PatternLayout">
			<conversionPattern value="%date [%thread] %-5level %logger - %message%newline"/>
		</layout>
 
	</appender>
	<root>
		
		
		
		
		
		
		
		
		<priority value="ALL"/>
 
		<level value="INFO"/>
		<appender-ref ref="rollingAppender" />
	</root>
</log4net>
```
>i 第三步：全局配置
```java
//日志
builder.Logging.AddLog4Net("CfgFile/log4net.Config");
```
>i 第四步：构造函数服务注入

```java
private readonly ILogger<WeatherForecastController> _logger;

public WeatherForecastController(ILogger<WeatherForecastController> logger)
{
    _logger = logger;
}
```
>d 注意： log4net.Config 右键设置为始终复制到本地