[Solved] ASP.Net Timer with DataTable Error: ERR_TOO_MANY_REDIRECTS

Hello,

How can I pull data from the database to the timer field?

When I try with these codes it gives an error ERR_TOO_MANY_REDIRECTS

        public void Veri()
        {
            string LessonID = string.Empty;
            string LessonName = string.Empty;
            string LessonStartTime = string.Empty;

            var da = new SqlDataAdapter("select * from Dersler", vt.conn());
            var dt = new DataTable();
            da.Fill(dt);

            foreach (DataRow row in dt.Rows)
            {
                foreach (DataColumn column in dt.Columns)
                {
                    LessonID = row["DersID"].ToString();
                    LessonName = row["DersAdi"].ToString();
                    LessonStartTime = row["DersBaslamaSaati"].ToString();
                }
            }
            return dt;
        }

        protected void TimerTick(object sender, EventArgs e)
        {
            lblMessage.Text = "";
            DataTable dt = Veri();
            DateTime currentDateTime = DateTime.Now;
            foreach (DataRow dr in dt.Rows)
            {
                DateTime startTime = Convert.ToDateTime(dr["StartTime"]);
                double diff = startTime.Subtract(currentDateTime).TotalSeconds;
                if (diff < 300 && diff > 60)
                {
                    lblMessage.Text = string.Format("{0} lession to be start in {1} minutes.",
                        dr["Lesson"].ToString(), Math.Round(diff / 60, 0));
                }
                else if (diff < 60 && diff > 0)
                {
                    lblMessage.Text = string.Format("{0} lession to be start in {1} seconds.",
                        dr["Lesson"].ToString(), Math.Round(diff));
                }
                else if (diff == 0)
                {
                    lblMessage.Text = string.Format("{0} lession started.", dr["Lesson"].ToString());
                }
            }
        }

    <asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
    <asp:UpdatePanel ID="UpdatePanel1" runat="server">
        <ContentTemplate>
            <asp:Label ID="lblMessage" runat="server" />
            <asp:Timer ID="Timer1" runat="server" OnTick="TimerTick" Interval="1000" />
        </ContentTemplate>
    </asp:UpdatePanel>