求助棘手问题，关于日志记录问题
写的一个日志记录代码，发现一个很严重的问题，同一种情况下报出异常后在xp下就会生成日志文件并且记录相关日志，但在win7环境下就什么都没有，请问怎么回事？？求解决
附上代码
/* * 异步日志类 * * * */using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Diagnostics;using System.Data.SqlClient;using System.IO;namespace Lib.Common.Common{ public sealed class AsynLogManager { #region Member Variables /// <summary> /// 用于Trace的组织输出的类别名称 /// </summary> private const string trace_sql = "\r\n***********************TRACE_SQL {0}*****************************\r\nTRACE_SQL"; /// <summary> /// 用于Trace的组织输出的类别名称 /// </summary> private const string trace_exception = "\r\n***********************TRACE_EXCEPTION {0}***********************"; /// <summary> /// 当前日志的日期 /// </summary> private static DateTime CurrentLogFileDate = DateTime.Now; /// <summary> /// 日志对象 /// </summary> private static TextWriterTraceListener twtl=new TextWriterTraceListener(); /// <summary> /// 日志根目录 /// </summary> private static string log_root_directory =AppDomain.CurrentDomain.BaseDirectory; //@"D:\log"; /// <summary> /// 日志子目录 /// </summary> private static string log_subdir; /// <summary> /// " {0} = {1}" /// </summary> private const string FORMAT_TRACE_PARAM = " {0} = {1}"; /// <summary> /// 1 仅控制台输出 /// 2 仅日志输出 /// 3 控制台+日志输出 /// </summary> private static readonly int flag = 2; //可以修改成从配置文件读取 #endregion #region Constructor static AsynLogManager() { System.Diagnostics.Trace.AutoFlush = true; switch (flag) { case 1: System.Diagnostics.Trace.Listeners.Add(new ConsoleTraceListener()); break; case 2: System.Diagnostics.Trace.Listeners.Add(TWTL); break; case 3: System.Diagnostics.Trace.Listeners.Add(new ConsoleTraceListener()); System.Diagnostics.Trace.Listeners.Add(TWTL); break; } } #endregion #region Method #region trace /// <summary> /// 异步错误日志 /// </summary> /// <param name="value"></param> public static void Trace(Exception ex) { new AsyncLogException(BeginTraceError).BeginInvoke(ex, null, null); } /// <summary> /// 异步SQL日志 /// </summary> /// <param name="cmd"></param> public static void Trace(SqlCommand cmd) { new AsyncLogSqlCommand(BeginTraceSqlCommand).BeginInvoke(cmd, null, null); } /// <summary> /// 异步SQL日志 /// </summary> /// <param name="sql"></param> /// <param name="parameter"></param> public static void Trace(string sql, params SqlParameter[] parameter) { new AsyncLogSql(BeginTraceSql).BeginInvoke(sql, parameter, null, null); } #endregion #region delegate private delegate void AsyncLogException(Exception ex); private delegate void AsyncLogSqlCommand(SqlCommand cmd); private delegate void AsyncLogSql(string sql, params SqlParameter[] parameter); private static void BeginTraceError(Exception ex) { if (null != ex) { //检测日志日期 StrategyLog(); //输出日志头 System.Diagnostics.Trace.WriteLine(string.Format(trace_exception, DateTime.Now)); while (null != ex) { System.Diagnostics.Trace.WriteLine(string.Format("{0} {1}\r\n{2}\r\nSource:{3}", ex.GetType().Name, ex.Message, ex.StackTrace, ex.Source)); ex = ex.InnerException; } } } private static void BeginTraceSqlCommand(SqlCommand cmd) { if (null != cmd) { SqlParameter[] parameter = new SqlParameter[cmd.Parameters.Count]; cmd.Parameters.CopyTo(parameter, 0); BeginTraceSql(cmd.CommandText, parameter); } } private static void BeginTraceSql(string sql, params SqlParameter[] parameter) { if (!string.IsNullOrEmpty(sql)) { //检测日志日期 StrategyLog(); System.Diagnostics.Trace.WriteLine(sql, string.Format(trace_sql, DateTime.Now)); if (parameter != null) { foreach (SqlParameter param in parameter) { System.Diagnostics.Trace.WriteLine(string.Format(FORMAT_TRACE_PARAM, param.ParameterName, param.Value)); } } } } #endregion #region helper /// <summary> /// 根据日志策略生成日志 /// </summary> private static void StrategyLog() { //判断日志日期 if (DateTime.Compare(DateTime.Now.Date, CurrentLogFileDate.Date) != 0) { DateTime currentDate = DateTime.Now.Date; //生成子目录 BuiderDir(currentDate); //更新当前日志日期 CurrentLogFileDate = currentDate; System.Diagnostics.Trace.Flush(); //更改输出 if (twtl != null) System.Diagnostics.Trace.Listeners.Remove(twtl); System.Diagnostics.Trace.Listeners.Add(TWTL); } } /// <summary> /// 根据年月生成子目录 /// </summary> /// <param name="currentDate"></param> private static void BuiderDir(DateTime currentDate) { int year = currentDate.Year; int month = currentDate.Month; //年/月 string subdir = string.Concat(year, '\\', month); string path = Path.Combine(log_root_directory, subdir); if (!Directory.Exists(path)) { Directory.CreateDirectory(path); } log_subdir = subdir; } #endregion #endregion #region Properties /// <summary> /// 日志文件路径 /// </summary> /// <returns></returns> private static string GetLogFullPath { get { return string.Concat(log_root_directory,"\\" ,string.Concat(log_subdir, @"\log", CurrentLogFileDate.ToShortDateString(), ".txt")); } } /// <summary> /// 跟踪输出日志文件 /// </summary> private static TextWriterTraceListener TWTL { get { if(twtl==null||twtl.Writer==null) { if (string.IsNullOrEmpty(log_subdir)) BuiderDir(DateTime.Now); else { string logPath = GetLogFullPath; if (!Directory.Exists(Path.GetDirectoryName(logPath))) BuiderDir(DateTime.Now); } twtl = new TextWriterTraceListener(File.Create(GetLogFullPath)); } return twtl; } } #endregion }}