asp.net寫入日誌到文字檔

using System;using System.Collections.Generic;using System.Web;using System.IO;using System.Text;/// <summary>/// Summary description for NetLog/// </summary>public class NetLog{    /// <summary>    /// 寫入日誌到文字檔    /// </summary>    /// <param name="action">動作</param>    /// <param name="strMessage">日誌內容</param>    /// <param name="time">時間</param>    public static void WriteTextLog(string action, string strMessage, DateTime time)    {        string path = AppDomain.CurrentDomain.BaseDirectory + @"System\Log\";        if (!Directory.Exists(path))            Directory.CreateDirectory(path);        string fileFullPath = path + time.ToString("yyyy-MM-dd") + ".System.txt";        StringBuilder str = new StringBuilder();        str.Append("Time:    " + time.ToString() + "\r\n");        str.Append("Action:  " + action + "\r\n");        str.Append("Message: " + strMessage + "\r\n");        str.Append("-----------------------------------------------------------\r\n\r\n");        StreamWriter sw;        if (!File.Exists(fileFullPath))        {            sw = File.CreateText(fileFullPath);        }        else        {            sw = File.AppendText(fileFullPath);        }        sw.WriteLine(str.ToString());        sw.Close();    }}