if (!IsPostBack)
{
if (Request.UrlReferrer != null && Request.UrlReferrer.ToString() != "http://www.langzixuehu.cn/")
{
StreamWriter rw = File.AppendText(Server.MapPath("~" + "//rizhi//url.txt"));
rw.WriteLine("来源URL" + Request.UrlReferrer.ToString() + "时间:" + DateTime.Now.ToString());
rw.Flush();
rw.Close();
}
}