private void getAnnounce()//        {
            string mbPath = Server.MapPath("teaplate_new.htm");
            Encoding code = Encoding.GetEncoding("gb2312");
            string fileName ="Tailor_select.htm";
            string strContent = "";
            string str = null;
            StreamReader sr = null;
            StreamWriter sw = null;
            try
            {
                sr = new StreamReader(mbPath, code);
                str = sr.ReadToEnd();            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                sr.Close();
            }
            string mySql = "select * from Tailor_select ";
            DBConn myDB = new DBConn();
            SqlDataReader mydr = myDB.getDataReader(mySql);            strContent = "<script type=\"text/javascript\" src=\"../js/data_select.js\"></script><body topmargin=\"1\"><select name=\"select\"  onclick=\"simOptionClick4IE()\"><option value=\"../index_three.html\" selected=\"selected\" class=\"error \" onClick=\"showOptionValue( this )\">  ...</option>";            while (mydr.Read())
            {
                string u = mydr["read_value"].ToString();
                string v = mydr["read_name"].ToString();
                strContent = strContent + "<option value='../" + u +"' onClick=\"showOptionValue(this, '" + u + "' )\" >" + v + "</option>\n";            }
            strContent = strContent + "</select></body>";
        
            mydr.Close();
            myDB.Close();
            try
            {                sw = new StreamWriter(Server.MapPath("title_new/") + fileName, false, code);
                sw.Write(strContent);
                sw.Flush();            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                sw.Close();  //在这提示错误 :未将对象引用设置到对象的实例。  在vs 2005中正常。在IIS中就错误。            }         }