异常日志文件errorlong

        #region log
        ////////////////////use///////////////
        /// <summary>
        /// 异常日志
        /// </summary>
        /// <param name="ex">Exception ex</param>
        /// <param name="flagTypeRemark">异常类型备注</param>
        public void LogException(Exception ex, string flagTypeRemark = "**")
        {
            AppPath = System.AppDomain.CurrentDomain.SetupInformation.ApplicationBase + @"file\Error\";
            log(AppPath, "\r\n##" + flagTypeRemark + "##\r\nMessage:" + ex.Message + "\r\nStacktrace:" + ex.StackTrace + "\r\n");
        }

        /// <summary>
        /// 本地日志记录
        /// </summary>
        /// <param name="logPath">日志路径</param>
        /// <param name="logContent">要记录的日志内容</param>
        public static void log(string logPath, string logContent)
        {
            string filePath = AppPath + "elog.log";
            string content = DateTime.Now.ToString("yyyyMMddHHmmss:") + logContent;
            if (!System.IO.Directory.Exists(AppPath)) System.IO.Directory.CreateDirectory(AppPath);
            if (!System.IO.File.Exists(filePath))
            {
                System.IO.File.AppendAllText(filePath, content);
                return;
            }
            ParameterizedThreadStart threadStart = new ParameterizedThreadStart(writeLog);
            Thread thread = new Thread(threadStart);
            thread.Name = "Pro_ErrorLog.log";
            thread.Start(logContent);
        }

        /// <summary>
        /// 当前程序运行路径
        /// </summary>
        public static string AppPath { get; set; }

        public static void writeLog(object str)
        {
            string filePath = AppPath + "elog.log";
            string content = "\r\n" + DateTime.Now.ToString("yyyyMMddHHmmss:") + str.ToString();
            System.IO.FileInfo info = new System.IO.FileInfo(filePath);
            if (info.Length >  *  * )
            {
                while (IsFileInUse(filePath))
                    Thread.Sleep();
                string backPath = AppPath + @"BackError\";
                if (!System.IO.Directory.Exists(backPath)) System.IO.Directory.CreateDirectory(backPath);
                System.IO.File.Move(filePath, backPath + "elog" + DateTime.Now.ToString("yyyyMMdd") + ".log");
                System.IO.File.Delete(filePath);
            }
            while (IsFileInUse(filePath))
                Thread.Sleep();
            if (!IsFileInUse(filePath))
            {
                #region write file
                System.IO.FileStream fs = null;
                try
                {
                    fs = new System.IO.FileStream(filePath, System.IO.FileMode.Append, System.IO.FileAccess.Write, System.IO.FileShare.None);
                    fs.Write(Encoding.UTF8.GetBytes(content), , Encoding.UTF8.GetByteCount(content));
                }
                catch
                {
                    ;
                }
                finally
                {
                    if (fs != null)
                        fs.Close();
                }
                #endregion
            }
        }

        /// <summary>
        /// 文件是否被占用？？
        /// </summary>
        /// <param name="fileName"></param>
        /// <returns></returns>
        public static bool IsFileInUse(string fileName)
        {
            bool inUse = true;
            System.IO.FileStream fs = null;
            try
            {
                fs = new System.IO.FileStream(fileName, System.IO.FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.None);
                inUse = false;
            }
            catch
            {
                inUse = true;
            }
            finally
            {
                if (fs != null)
                    fs.Close();
            }
            return inUse;
        }
        #endregion

//use
LogException(ex, "异常类型备注文本");//