.net framework 4.6 asp.net mvc 使用NLog

NUGET添加NLog和NLog.Config的引用

配置NLog.config

<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://www.nlog-project.org/schemas/NLog.xsd NLog.xsd"
      autoReload="true"
      throwExceptions="false"
      internalLogLevel="Off" internalLogFile="c:\temp\nlog-internal.log">

  <!--archiveAboveSize以字節爲單位，1K位1024字節，1048576表示1M，104857600表示100M-->
  <targets>
    <target xsi:type="File" name="logfile" fileName="/data/logs/${shortdate}.log"
        archiveFileName="/data/logs/${shortdate}.{#####}.txt"
        archiveAboveSize="10485760"
        archiveNumbering="Rolling"
        concurrentWrites="true"
        maxArchiveFiles="5"
        keepFileOpen="false" />
  </targets>

  <rules>
    <!--DEBUG,INFO,WARN,ERROR,FATAL-->
    <logger name="*" minlevel="Debug" writeTo="logfile" />
  </rules>
</nlog>

 添加LogHelper

    /// <summary>
    /// NLog輔助類
    /// 建立人：蘇本東
    /// 建立時間：2019/3/22 10:49:00 
    /// </summary>
    public class LogHelper
    {
        private static Logger Logger = LogManager.GetCurrentClassLogger();

        #region 普通級別

        /// <summary>
        /// 普通級別
        /// </summary>
        /// <param name="content"></param>
        public static void Info(string content)
        {
            Logger.Info(content);
        }

        /// <summary>
        /// 普通級別
        /// </summary>
        /// <param name="exception"></param>
        /// <param name="content"></param>
        public static void Info(Exception exception, string content)
        {
            Logger.Info(exception, content);
        }

        #endregion

        #region 警告級別

        /// <summary>
        /// 警告級別
        /// </summary>
        /// <param name="content"></param>
        public static void Warn(string content)
        {
            Logger.Warn(content);
        }

        /// <summary>
        /// 警告級別
        /// </summary>
        /// <param name="exception"></param>
        /// <param name="content"></param>
        public static void Warn(Exception exception, string content)
        {
            Logger.Warn(exception, content);
        }

        #endregion

        #region 錯誤級別

        /// <summary>
        /// 錯誤級別
        /// </summary>
        /// <param name="content"></param>
        public static void Error(string content)
        {
            Logger.Error(content);
        }

        /// <summary>
        /// 錯誤級別
        /// </summary>
        /// <param name="exception"></param>
        /// <param name="content"></param>
        public static void Error(Exception exception, string content)
        {
            Logger.Error(exception, content);
        }

        #endregion
    }

使用NLog

    public class LogController : Controller
    {
        public ActionResult Index()
        {
            LogHelper.Info("普通訊息日誌");
            LogHelper.Warn("警告信息日誌");
            LogHelper.Error("錯誤信息日誌");
            LogHelper.Info(new Exception("異常發生"), "異常信息");

            return Content("success");
        }
    }

注意：根據個人配置，日誌會輸出到C盤根目錄下，而不是項目根目錄下，這點須要注意。

參考網址：https://www.cnblogs.com/kejie/p/6211597.html，上半部份內容。