using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Configuration;

namespace Framework
{
    public class Logger
    {
        public Logger(Type Class)
        {
            this.classname = Class.Name;
        }

        private string classname;

        public string ClassName
        {
            get
            {
                return this.classname;
            }
            set
            {
                this.classname = value;
            }
        }

        public void SystemLog(string Message, string Method) { WriteLogInTxtFile(1, Message, Method); }

        public void InfoLog(string Message, string Method) { WriteLogInTxtFile(2, Message, Method); }

        public void DebugLog(string Message, string Method) { WriteLogInTxtFile(3, Message, Method); }

        public void ErrorLog(string Message, string Method) { WriteLogInTxtFile(4, Message, Method); }

        public void WarnLog(string Message, string Method) { WriteLogInTxtFile(4, Message, Method); }

        public void ErrorLog(Exception Ex, string Method)
        {
            string Message = String.Format("異常資訊: {0}, 異常堆疊資訊: {1} ", Ex.Message, Ex.StackTrace);
            ErrorLog(Message, Method);
        }

        private void WriteLogInTxtFile(Int16 LogType, string Message, string Method)
        {
            string Path = AppDomain.CurrentDomain.BaseDirectory;

            string LogFolder = "Logs";

            if (!String.IsNullOrEmpty(ConfigurationManager.AppSettings["LogFolder"]))
            {
                LogFolder = ConfigurationManager.AppSettings["LogFolder"];
            }

            string LogPathType = String.Empty;

            switch (LogType)
            {
                case 1:
                    Path += String.Format("{0}\\System\\", LogFolder);
                    LogPathType = "System";
                    break;
                case 2:
                    Path += String.Format("{0}\\Info\\", LogFolder);
                    LogPathType = "Info";
                    break;
                case 3:
                    Path += String.Format("{0}\\Debug\\", LogFolder);
                    LogPathType = "Debug";
                    break;
                case 4:
                    Path += String.Format("{0}\\Error\\", LogFolder);
                    LogPathType = "Error";
                    break;
            }

            if (!Directory.Exists(Path))
            {
                Directory.CreateDirectory(Path);
            }

            //日誌檔案是以當天時間命名
            string FileName = String.Format("{0}{1}", Path, "Log" + DateTime.Now.ToString("yyyyMMdd") + ".txt");

            if (!File.Exists(FileName))
            {
                File.Create(FileName).Close();
            }

            //日誌格式
            string LogFormat = String.Format("Start   時間：{0}   日誌型別：{1}   類名：{2}   方法名稱：{3}   日誌內容：{4}   End;", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"), LogPathType, ClassName, Method, Message);

            using (StreamWriter writer = File.AppendText(FileName))
            {
                writer.WriteLine(LogFormat);
            }
        }
    }
}
 

Step2:呼叫Log類

  Logger log = new Logger(MethodBase.GetCurrentMethod().DeclaringType);
  log.DebugLog("debuggerLog", MethodBase.GetCurrentMethod().Name);
<pre name="code" class="csharp">  log.ErrorLog("ErrorLog", MethodBase.GetCurrentMethod().Name);

<pre name="code" class="csharp">  log.InfoLog("InfoLog", MethodBase.GetCurrentMethod().Name);