C# Log4Net 记录项目日志

//1。 安装log4net 包

//2。 新建 LoggerHelper 类

[assembly: log4net.Config.XmlConfigurator()]
namespace WebAPI.Common
{
    public class LoggerHelper
    {
        /// <summary>
        /// 输出日志到Log4Net
        /// </summary>
        /// <param name="t"></param>
        /// <param name="ex"></param>
        #region static void WriteLog(Type t, Exception ex)

        public static void WriteLog(Type t, Exception ex)
        {
            log4net.ILog log = log4net.LogManager.GetLogger(t);
            log.Error("Error", ex);
        }

        #endregion

        /// <summary>
        /// 输出日志到Log4Net
        /// </summary>
        /// <param name="t"></param>
        /// <param name="msg"></param>
        #region static void WriteLog(Type t, string msg)

        public static void WriteLog(Type t, string msg)
        {
            log4net.ILog log = log4net.LogManager.GetLogger(t);
            log.Error(msg);
        }

        #endregion
    }
}

//3。 在web.cofig 中加入如下配置
<configuration>
  <configSections> 
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
  </configSections>
 <log4net>
    <appender name="rollingFile" type="log4net.Appender.RollingFileAppender,log4net">
      <param name="File" value="log/" />
      <param name="AppendToFile" value="true" />
      <param name="RollingStyle" value="Date" />
      <param name="DatePattern" value="yyyy\yyyyMM\yyyyMMdd'.txt'" />
      <param name="staticLogFileName" value="false" />
      <param name="MaxSizeRollBackups" value="100" />
      <layout type="log4net.Layout.PatternLayout">
        <param name="ConversionPattern" value="%newline %nDate：%date %ThreadID:[%thread] %nLevel：  %-5level %nErrorClass：%logger property: [%property{NDC}] - %nError Description：%message%newline %n" />
      </layout>
    </appender>
    <root>
      <level value="ALL" />
      <appender-ref ref="rollingFile" />
    </root>
  </log4net>

</configuration>

//4。在调用其它类（StudentController）中调用logger

LoggerHelper.WriteLog(typeof(StudentController), "ErrorMessage");


//5. 执行log代码时，会在项目文件中新建Log文件夹，记录txt文件log