update DB(sql server management) from AJAX timer control

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C#

C#4.0

hi i need to update my database by giving timer. After every 10 sec i need to update my DB after a button click.By seeing the change in table another column(flag) should be set to ON/OFF....
please guide through this...







protected void Button1_Click(object sender, EventArgs e)
{
timer();


}

public void timer()
{
Timer = new System.Timers.Timer();
Timer.Interval = 15000;
Timer.Enabled = true;
Timer.Elapsed += new System.Timers.ElapsedEventHandler(Timer1_Tick);
Timer.Start();

}


protected void Timer1_Tick(object sender, EventArgs e)
{

//Label1.Text = System.DateTime.Now.ToString();

SqlConnection con = new SqlConnection();
SqlCommand com1 = new SqlCommand("SELECT State,ControlId,flag,ControlValue FROM update_tr");
SqlCommand com = new SqlCommand("update update_tr SET State = 'CR' where ControlId = 'Button1'");
con.ConnectionString = "Data Source=APCOGSERVER;Initial Catalog=ApcogDB;Integrated Security=True";

con.Open();
com.Connection = con;
com1.Connection = con;
com.ExecuteReader();
com1.ExecuteReader();
SqlParameter param = new SqlParameter();
param.ParameterName="flag";
//param.ParameterName="State";

param.Value = "ON";
com1.Parameters.Add(param);
con.Close();
}