本地化记录日志(写文件)

平日工作中会写一些小的工具，但是使用log4net又过于大了些，感觉没有必要，所以就用记事本去记录一些系统日志

代码如下：

private static object objLock = new object(); // 读写文件锁
        /// <summary>
        /// 记录错误日志
        /// </summary>
        /// <param name="lcontent">错误日志内容</param>
        /// <param name="filePath">错误日志保存文件路径</param>
        public static void WriteErrorLog(string filePath, string lcontent)
        {
            string directoty = DateTime.Now.ToString("yyyyMMdd") + "\\" + filePath + "\\";
            string fileName = string.Empty;

            if (string.IsNullOrEmpty(fileName))
            {
                fileName = DateTime.Now.ToString("yyyyMMdd") + ".txt";
            }
            else
            {
                fileName = fileName + ".txt";
            }
            string content = DateTime.Now.ToString() + "\r\n" + lcontent + "\r\n\r\n";
            WriteInfoToFile(directoty, fileName, content);
        }

        /// <summary>
        /// 记录错误到到日志文件
        /// </summary>
        /// <param name="directory">目录</param>
        /// <param name="fileName">文件名</param>
        /// <param name="content">错误内容</param>
        private static void WriteInfoToFile(string directory, string fileName, string content)
        {
            System.IO.FileStream fs = null;
            System.IO.TextWriter tw = null;
            try
            {
                lock (objLock)
                {
                    string logPath = Assembly.GetExecutingAssembly().Location;
                    //string logPath =HttpContext.Current.Server.MapPath("~");
                    logPath = logPath.Substring(0, logPath.LastIndexOf('\\'));//删除文件名;
                    logPath = logPath + @"\log\" + directory;
                    if (!System.IO.Directory.Exists(logPath))
                        System.IO.Directory.CreateDirectory(logPath);

                    fs = new System.IO.FileStream(logPath + fileName, System.IO.FileMode.OpenOrCreate, System.IO.FileAccess.Write, System.IO.FileShare.ReadWrite);
                    tw = new System.IO.StreamWriter(fs);

                    fs.Seek(0, System.IO.SeekOrigin.End);
                    tw = System.IO.TextWriter.Synchronized(tw);
                    tw.Write(content);
                    tw.Flush();
                    tw.Close();
                    fs.Close();
                }
            }
            catch (IOException ex)
            {
                throw ex;
            }
            finally
            {
                if (tw != null)
                {
                    tw.Close();
                    tw.Dispose();
                }
                if (fs != null)
                {
                    fs.Close();
                    fs.Dispose();
                }
            }
        }

考虑到日志记录会越来越多，所以产生了删除日志的方法，代码如下：

 /// <summary>
        /// 删除早期产生的老的日志
        /// </summary>
        private void DeleteLogFile()
        {
            //删除早期日志
            var time = DateTime.Now.AddDays(-10);
            var year = time.Year;
            var month = time.ToString("yyyyMM");
            var date = time.ToString("yyyyMMdd");
            var filePath = AppDomain.CurrentDomain.BaseDirectory + @"log\" + year + @"\" + month + @"\" + date + ".txt";
            if (File.Exists(filePath))
            {
                File.Delete(filePath);
            }
            if (DateTime.Now.Day >= 10)
            {
                //删除上个月产生的文件夹
                var lastMothTime = DateTime.Now.AddMonths(-1);
                var lastMothYear = lastMothTime.Year;
                var lastMonth = lastMothTime.ToString("yyyyMM");
                var lastMonthLogFilePath = AppDomain.CurrentDomain.BaseDirectory + @"log\" + lastMothYear + @"\" + lastMonth;
                if (Directory.Exists(lastMonthLogFilePath))
                {
                    Directory.Delete(lastMonthLogFilePath, true);
                }
                //删除上一年产生的日志文件夹
                var lastYear = DateTime.Now.AddYears(-1).Year;
                var lastYearLogFilePath = AppDomain.CurrentDomain.BaseDirectory + @"log\" + lastYear;
                if (Directory.Exists(lastYearLogFilePath))
                {
                    Directory.Delete(lastYearLogFilePath, true);
                }
            }
        }