记录日志的插件源码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using System.IO;

namespace User_Log
{
    //形如："C://ABC//AppName_2222_02_22.log"
    public class UserLogger
    {
        private string filePath = string.Empty; //形如："C://ABC"
        private string appName = string.Empty; //形如："AppName"
        private string startTag = "******************************";
        public string FilePath
        {
            set { this.filePath = value; }
        }

        public string AppName
        {
            set => appName = value;
        }

        public void WriteLog(string msg)
        {
            try
            {
                string dt = DateTime.Now.ToString("yyyy_MM_dd");
                string logFileName = string.Format("{0}//{1}_{2}.log", filePath, appName, dt);
                if (Directory.Exists(filePath) == false)
                {
                    Directory.CreateDirectory(filePath);
                }
                if (File.Exists(logFileName) == false)
                {
                    File.Create(logFileName);
                }

                using (StreamWriter sw = new StreamWriter(logFileName, true, Encoding.UTF8))
                {
                    sw.WriteLine(startTag);
                    sw.WriteLine(DateTime.Now.ToString("[HH:mm:ss]"));
                    sw.WriteLine(msg);
                    sw.Write(Environment.NewLine);
                    sw.Flush();
                    sw.Close();
                }
            }
            catch { }                              
        }
    }
}