c#自定义日志记录

前言：自定义写入日志，需要注意多线程下文件读取写入时异常问题处理：下面列举了2种优化方案：

废话不多说，直接上代码：

很简单：将类复制到项目中，最后在配置文件上配置一下：logUrl即可。 默认保存在：项目/temp/log

 自定义日志类1：

/// <summary>
    /// 日志类
    /// </summary>
    /// <remarks>Creator: v-lxh  CreateTime: 2016/7/26 11:18:09</remarks>
    /// <Description></Description>
    public class Log
    {
        /// <summary>
        /// 写入日志.
        /// </summary>
        /// <param name="strList">The STR list.</param>
        /// <remarks>Creator: v-lxh  CreateTime: 2016/7/26 11:18:09</remarks>
        /// <Description></Description>
        public static void WriteLog(params object[] strList)
        {
            //判断是否开启日志模式
            //if (!LogModel) return;
            if (strList.Count() == 0) return;
            //日志文件路径
            string strDicPath = "";
            try
            {
                strDicPath = HttpContext.Current.Server.MapPath("~/temp/log/");
                if (strDicPath == null || strDicPath == "")
                {
                    strDicPath = System.Configuration.ConfigurationManager.AppSettings["logUrl"] + "/temp/log/";
                }
            }
            catch (Exception e)
            {
                strDicPath = System.Configuration.ConfigurationManager.AppSettings["logUrl"] + "/temp/log/";
            }
            string strPath = strDicPath + string.Format("{0:yyyy年-MM月-dd日}", DateTime.Now) + "日志记录.txt";
            if (!Directory.Exists(strDicPath))
            {
                Directory.CreateDirectory(strDicPath);
            }
            if (!File.Exists(strPath))
            {
                using (FileStream fs = File.Create(strPath)) { }
            }
            string str = File.ReadAllText(strPath);
            StringBuilder sb = new StringBuilder();
            foreach (var item in strList)
            {
                sb.Append("
" + DateTime.Now.ToString() + "-----" + item + "");
            }
            File.WriteAllText(strPath, sb.ToString() + "
-----z-----
" + str);
        }

    }

  初稿1--优化1-使用Lock锁定资源：

   /// <summary>
    /// 日志类
    /// </summary>
    /// <remarks>Creator: lixh  CreateTime: 2017/3/23 11:18:09</remarks>
    /// <Description></Description>
    public class Log
    {
        //日期文件夹路径
        public static string strDicPath = "";

        //静态方法todo:在处理话类型之前自动调用，去检查日志文件夹是否存在
        static Log()
        {
            //todo:通过当前http请求上下文获取的服务器相对路径下的物理路径--非静态资源--占用资源
            //string strDicPath = System.Web.HttpContext.Current.Server.MapPath("~/temp/log/");

            //静态类型--获取应用所在的物理路径--节省资源
            //strDicPath = System.Web.HttpRuntime.AppDomainAppPath + "\temp\logs\";
　　　　　　　//winform等非web程序可使用以下方法：
　　　　　　  strDicPath = System.Threading.Thread.GetDomain().BaseDirectory.Replace("\bin\Debug", "") + "\temp\logs\";

            //创建文件夹
            if (!Directory.Exists(strDicPath))
            {
                Directory.CreateDirectory(strDicPath);
            }
        }

        /// <summary>
        /// 写入日志.
        /// </summary>
        /// <param name="strList">The STR list.</param>
        /// <remarks>  </remarks>
        /// <Description></Description>
        public static void WriteLog(params object[] strList)
        {
            if (strList.Count() == 0) return;
            string strPath = "";  //文件路径
            try
            {
                strPath = strDicPath + string.Format("{0:yyyy年-MM月-dd日}", DateTime.Now) + "日志记录.txt";
            }
            catch (Exception e)
            {
                strDicPath = "C:\temp\log\";
                strPath = strDicPath + string.Format("{0:yyyy年-MM月-dd日}", DateTime.Now) + "日志记录.txt";
            }

            //todo:自动创建文件（但不能创建文件夹），并设置文件内容追加模式，使用using会自动释放FileSteam资源
            using (FileStream stream = new FileStream(strPath, FileMode.Append))
            {
                lock (stream)  //锁定资源，一次只允许一个线程写入
                {
                    StreamWriter write = new StreamWriter(stream);
                    string content = "";
                    foreach (var str in strList)
                    {
                        content += "
" + DateTime.Now.ToString() + "-----" + str;
                    }
                    content += "
-----z-----
";
                    write.WriteLine(content);

                    //关闭并销毁流写入文件
                    write.Close();
                    write.Dispose();
                }
            }
        }


        /// <summary>
        /// 写入日志.
        /// </summary>
        /// <param name="strList">The STR list.</param>
        /// <remarks></remarks>
        /// <Description></Description>
        public static void WriteLog(Action DefFunc, Func<string> ErrorFunc = null)
        {
            try
            {
                DefFunc();
            }
            catch (Exception ex)
            {
                string strPath = strDicPath + string.Format("{0:yyyy年-MM月-dd日}", DateTime.Now) + "日志记录.txt";

                //todo:自动创建文件（但不能创建文件夹），并设置文件内容追加模式，使用using会自动释放FileSteam资源
                using (FileStream stream = new FileStream(strPath, FileMode.Append))
                {
                    lock (stream)   //锁定资源，一次只允许一个线程写入
                    {
                        StreamWriter write = new StreamWriter(stream);
                        string content = "
" + DateTime.Now.ToString() + "-----" + ex.Message;
                        content += "
" + DateTime.Now.ToString() + "-----" + ex.StackTrace;
                        content += "
-----z-----
";
                        write.WriteLine(content);

                        //关闭并销毁流写入文件
                        write.Close();
                        write.Dispose();
                    }
                }
            }
        }
    }

//初稿2-优化-使用微软提供的读写锁：

//读写锁，当资源处于写入模式时，其他线程写入需要等待本次写入结束之后才能继续写入
        private static ReaderWriterLockSlim LogWriteLock = new ReaderWriterLockSlim();
        /// <summary>
        /// 写入日志.
        /// </summary>
        /// <param name="strList">The STR list.</param>
        /// <remarks>  </remarks>
        /// <Description></Description>
        public static void WriteLog(params object[] strList)
        {
            if (strList.Count() == 0) return;
            string strPath = "";  //文件路径
            try
            {
                strPath = strDicPath + string.Format("{0:yyyy年-MM月-dd日}", DateTime.Now) + "日志记录.txt";
            }
            catch (Exception e)
            {
                strDicPath = "C:\temp\log\";
                strPath = strDicPath + string.Format("{0:yyyy年-MM月-dd日}", DateTime.Now) + "日志记录.txt";
            }

            try
            {
                //todo:自动创建文件（但不能创建文件夹），并设置文件内容追加模式，使用using会自动释放FileSteam资源
                LogWriteLock.EnterWriteLock();

                using (FileStream stream = new FileStream(strPath, FileMode.Append))
                {
                    StreamWriter write = new StreamWriter(stream);
                    string content = "";
                    foreach (var str in strList)
                    {
                        content += "
" + DateTime.Now.ToString() + "-----" + str;
                    }
                    content += "
-----z-----
";
                    write.WriteLine(content);

                    //关闭并销毁流写入文件
                    write.Close();
                    write.Dispose();
                }
            }
            catch (Exception)
            {

            }
            finally {
                LogWriteLock.ExitWriteLock();
            }
        }