asp.net中的timer控件

下面这段代码运行不了，编译时指出的错误是：非静态的字段、方法或属性“_default.aspx.cs”要求对象引用引用。表示错误的指针指向的是“ while (sdd.Read())
        {
            TextBox1.Text += sdd["name"] + "在" + sdd["time"] + "时说到：" + '\n' + sdd["word"] + '\n';
max1 += 1;
        }”中的TextBox1.Text。请问怎么解决呢？（TextBox1是页面上的一个文本框）

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using System.Timers;
public partial class _Default : System.Web.UI.Page
{

    private int i ;
    private string str=String.Empty;
    private static int max1;
    private static void OnTimedEvent(object source, System.Timers.ElapsedEventArgs e)
    {
        SqlConnection h = new SqlConnection();
        h.ConnectionString = "Data Source=20101010-2103;Initial Catalog=chat1;Integrated Security=True";
        h.Open();
        SqlCommand cmd3 = new SqlCommand("select * from liaotian where id>max1", h);
        SqlDataReader sdd = cmd3.ExecuteReader();
        while (sdd.Read())
        {
            TextBox1.Text += sdd["name"] + "在" + sdd["time"] + "时说到：" + '\n' + sdd["word"] + '\n';
max1 += 1;
        }

    }
    protected void Page_Load(object sender, EventArgs e)
    {

        int max = 0; int j;
        SqlConnection f = new SqlConnection();

        f.ConnectionString = "Data Source=20101010-2103;Initial Catalog=chat1;Integrated Security=True";
        f.Open();
        SqlCommand cmd1 = new SqlCommand("select * from liaotian", f);
        SqlDataReader sd = cmd1.ExecuteReader();
        while (sd.Read())
        {Response.Write(sd["id"]);
            TextBox1.Text += sd["name"] + "在" + sd["time"] + "时说到：" + '\n' + sd["word"]+'\n';
        }
        f.Close();
        SqlConnection d = new SqlConnection();

        d.ConnectionString = "Data Source=20101010-2103;Initial Catalog=chat1;Integrated Security=True";
        d.Open();
        SqlCommand cmd = new SqlCommand("select * from liaotian", d);
        SqlDataReader sdr = cmd.ExecuteReader();
        while (sdr.Read())
        {
            j = Convert.ToInt32(sdr["id"]);
            if (max < j)
                max =Convert.ToInt32( sdr["id"]);
        }
        i = max+1;
        d.Close();
        max1 = i-1;

      System.Timers.Timer myTimer = new System.Timers.Timer();
  myTimer.Elapsed += new System.Timers.ElapsedEventHandler(OnTimedEvent);
  myTimer.Interval = 500;
  myTimer.Enabled = true;



    }
    --------------------编程问答-------------------- SqlCommand cmd3 = new SqlCommand("select * from liaotian where id>"+max1, h);
  SqlDataReader sdd = cmd3.ExecuteReader();
  while (sdd.Read())
  {
  TextBox1.Text += sdd["name"] + "在" + sdd["time"] + "时说到：" + "\n" + sdd["word"] + "\n";
  }
--------------------编程问答-------------------- 是TextBox1的问题

补充：.NET技术 ,  ASP.NET