多線程程序寫日誌時遇到加鎖的問題

   前段時間在做項目時，系統是個多線程程序，幾個線程都需要寫日誌，主線程和通訊線程經常在寫日誌時打架，爲了解決這個問題，考慮在寫日誌的方法中加鎖。代碼如下：

  　　 /// <summary>
        /// 寫日誌時加鎖
        /// </summary>
        private static object m_Lock = new object();

 

        /// <summary>
        /// 寫日誌文件的接口函數,此函數只向指定的文件寫入字符串

        /// </summary>
        /// <param name="DestFileName"></param>
        /// <param name="fmt"></param>
        /// <returns></returns>
        public static int TP_WriteAppLogFileEx(string DestFileName, string fmt)
        {
            string strLogFile = System.Environment.CurrentDirectory+"\\Log\\"+DateTime.Now.ToString("yyyyMMdd")+".log";
            if (strLogFile != DestFileName)
            {
                DestFileName = strLogFile;
            }
            int iWriteAppLogFile = 0;
            lock (m_Lock)
            {
                iWriteAppLogFile=TP_WriteAppLogFile(DestFileName, fmt);
            }
            return iWriteAppLogFile;
        }

 

 public static int TP_WriteAppLogFile(string DestFileName, string fmt)
        {
            try
            {
   FileInfo file = new FileInfo(DestFileName);

                if (!file.Exists)
                {
                    file.Create();
                }

                //定位到文件尾
                StreamWriter stream = file.AppendText();

                //寫當前的時間
                stream.Write(DateTime.Now.ToString("HH:mm:ss fff "));

                //寫用戶傳過來的字符串
                stream.WriteLine(fmt);

                //最後記着要關了它
                stream.Close(); 

            }
            catch (Exception e)
            {

            }

            return 0;
        }

經過加鎖處理後，多線程寫日誌打架的問題得到了解決。