日志记录类

代码：

 namespace Assist.Log

{

    public static class DownLog

    {

        private static string FileName = string.Empty;

        private static StreamWriter swLog = null;

        private static readonly string ExtName = "_DownLog.txt";//日志类型

        private static readonly string ConfigLogPath = "LogPath";//日志储存路径

        private static readonly string ConfigLogSaveDate = "LogSaveDay";//储存天数

        private static System.Collections.Generic.Queue<string> LogBuffer;

        private static ThreadStart job = new ThreadStart(WriterLog);

        private static Thread thread = new Thread(job);



        /// <summary>

        /// 存放日志目录

        /// </summary>

        private static string _LogPath = null;

        private static string LogPath

        {

            get

            {

                if (_LogPath == null)

                {

                    if (ConfigurationManager.AppSettings[ConfigLogPath] != null)

                    {

                        _LogPath = ConfigurationManager.AppSettings[ConfigLogPath];

                    }

                    else

                    {//默认值

                        //_LogPath = AppDomain.CurrentDomain.BaseDirectory + @"log\";//App应用

                        _LogPath = AppDomain.CurrentDomain.BaseDirectory + @"bin\Log\";//Web应用

                    }

                }



                return _LogPath;

            }

        }



        /// <summary>

        /// 日志保存期(天)

        /// </summary>

        private static int _SaveDay = -1;

        private static int SaveDay

        {

            get

            {

                if (_SaveDay == -1)

                {

                    if (ConfigurationManager.AppSettings[ConfigLogSaveDate] != null)

                    {

                        _SaveDay = int.Parse(ConfigurationManager.AppSettings[ConfigLogSaveDate]);

                    }

                    else

                    {//默认值

                        _SaveDay = 31;

                    }

                }



                return _SaveDay;

            }

        }



        private static void WriterLog()

        {

            while (true)

            {

                TextWriter twLog = GetStreamWriter();

                while (LogBuffer!=null && LogBuffer.Count > 0)

                {

                    twLog.Write(LogBuffer.Dequeue() + "\r\n");

                    twLog.Flush();

                    //Thread.Sleep(50);

                }

                Thread.Sleep(30);

            }

        }





        private static StreamWriter GetStreamWriter()

        {

            if ((FileName != System.DateTime.Now.ToString("yyyy_MM_dd")) || swLog == null)

            {

                if ((swLog != null)) swLog.Close();

                if (!Directory.Exists(LogPath))

                {

                    Directory.CreateDirectory(LogPath);

                }

                FileName = System.DateTime.Now.ToString("yyyy_MM_dd");

                DelLog(LogPath, SaveDay);

                try

                {

                    swLog = new StreamWriter(Path.Combine(LogPath, FileName + ExtName), true, System.Text.Encoding.UTF8, 1024);

                }

                catch

                {

                    if ((swLog != null))

                    {

                        swLog.Close();

                        System.Threading.Thread.Sleep(30);

                        swLog = new StreamWriter(Path.Combine(LogPath, FileName + ExtName), true, System.Text.Encoding.UTF8, 1024);

                    }

                }

            }

            return swLog;

        }





        /// <summary>

        /// 系统日志信息记录

        /// </summary>

        /// <param name="Info">记录的内容（用;号分开）</param>

        public static void WriteLog(string Info)

        {

            if (LogBuffer == null)

            {

                LogBuffer = new System.Collections.Generic.Queue<string>();

                thread.IsBackground = true;

                thread.Start();

            }

            if (!string.IsNullOrEmpty(Info))

            {

                LogBuffer.Enqueue(Info);

            }

        }

        

        /// <summary>

        /// 自动删除过期日志文件

        /// </summary>

        /// <param name="path">路径</param>

        /// <param name="day">超出的天数</param>

        private static void DelLog(string path, double day)

        {

            if (SaveDay > 0)

            {

                DirectoryInfo folder = new DirectoryInfo(path);

                FileInfo[] chldFiles = folder.GetFiles("*" + ExtName);

                foreach (FileInfo chlFile in chldFiles)

                {

                    try

                    {

                        if (chlFile.Name.Replace(ExtName, "").CompareTo(DateTime.Now.AddDays(-day).ToString("yyyy_MM_dd")) <= 0) chlFile.Delete();

                    }

                    catch { }

                }

            }

        }

    }

}

 

调用：

Assist.Log.DownLog.WriteLog(“日志内容，要求string类型”);