using System.IO;
public static void WriteLog(string strLog)
{string sFilePath="d:\\"+DateTime.Now.ToString("yyyyMM");string sFileName = "rizhi" + DateTime.Now.ToString("dd") + ".log";sFileName = sFilePath+ "\\"+sFileName; //文件的绝对路径if (!Directory.Exists(sFilePath))//验证路径是否存在
  {Directory.CreateDirectory(sFilePath);//不存在则创建
  }FileStream fs;      StreamWriter sw;if (File.Exists(sFileName))//验证文件是否存在，有则追加，无则创建
  {fs = new FileStream(sFileName, FileMode.Append, FileAccess.Write);}else{fs = new FileStream(sFileName, FileMode.Create, FileAccess.Write);}sw = new StreamWriter(fs);sw.WriteLine(DateTime.Now.ToString("yyyy-MM-dd HH-mm-ss") + "   ---   " + strLog);sw.Close();fs.Close();
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using log4net;
using log4net.Core;[assembly: log4net.Config.XmlConfigurator(Watch = true)]
namespace BoilerDashboard.Common
{public  class LogHelper{/// <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}
}