Exception Error log

 public class ExceptionsHandler

    {

        /// <summary>

        ///  

        /// </summary>

        /// <param name="e">Exception</param>

        public static void WriteError(Exception e)

        {

            try

            {

                // ， 

                string path = "~/Error/" + DateTime.Today.ToString("yyyy-MM-dd") + ".log";

                if (!File.Exists(System.Web.HttpContext.Current.Server.MapPath(path)))

                {

                    /// ， Log

                    File.Create(System.Web.HttpContext.Current.Server.MapPath(path)).Close();

                }

                // 

                using (StreamWriter w = File.AppendText(System.Web.HttpContext.Current.Server.MapPath(path)))

                {

                    // 

                    w.WriteLine("Error Recode:");

                    w.WriteLine("\tError Time:{0}", DateTime.Now.ToString(CultureInfo.InvariantCulture));

                    w.WriteLine("\tError Address:" + System.Web.HttpContext.Current.Request.Url.ToString());

                    w.WriteLine("\tTarget Site:" + e.TargetSite);

                    w.WriteLine("\tError Message:" + e.Message);

                    w.WriteLine("\tError InnerMessage:" + e.InnerException.Message);

                    w.WriteLine("\tError HelpLink:" + e.HelpLink);

                    w.WriteLine("\tError StackTrace:" + e.StackTrace);

                    w.WriteLine("************************************************************************************");

                    w.WriteLine("\r
");

                    w.Flush();

                    w.Close();

                }

            }

            // 

            catch (Exception)

            {

                //throw new Exception(" ！" + ex.Message);

            }

        }

    }