最安全的写日志方法

 using System;

    2 using System.Data;

    3 using System.Configuration;

    4 using System.Collections;

    5 using System.Web;

    6 using System.Web.Security;

    7 using System.Web.UI;

    8 using System.Web.UI.WebControls;

    9 using System.Web.UI.WebControls.WebParts;

   10 using System.Web.UI.HtmlControls;

   11 

   12 public partial class Default2 : System.Web.UI.Page

   13 {

   14 

   15     public static Object synchronizeVariable = “locking”;

   16 

   17     protected void Page_Load(object sender, EventArgs e)

   18     {

   19         String fileName = Context.Server.MapPath(“~”) +

   20             “\\App_Data\\UserAgents.txt”;

   21         lock (synchronizeVariable)

   22         {

   23             StreamWriter sw = new StreamWriter(fileName, true);

   24             sw.WriteLine(DateTime.Now);

   25             sw.WriteLine(Request.UserAgent);

   26             sw.Close();

   27         }

   28     }

   29 }