How to Put a Sleep or Timer & Autoclick functions in the C# Windows forms Application to Execute an SQL command for every 30 Seconds.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
 
namespace LocationFinder
{
    public partial class MainForm : Form
    {
        public MainForm()
        {
            InitializeComponent();
        }
        private void dateTimePicker1_ValueChanged(object sender, EventArgs e)
        {
 
        }
 
        private void MainForm_Load(object sender, EventArgs e)
        {
        //While true is actually not suggested, this will lead to an endless loop, but your requirement says to put while true. You can use a for loop and put some counter condition also.
		string old_reader_val = "";//global variable to store the reader[0] value
            while(true)
            {
            string connetionString = null;
            SqlConnection conn;
            SqlCommand cmd;
            string sql = null;
            SqlDataReader reader;
 
            connetionString = "server=(local);database=modelDb;user id=sa;pwd=123456";
            sql = "DECLARE @var varchar(1000) = (SELECT TOP 1 Text FROM Alarms WHERE AlarmDefinitionId=139 ORDER BY EventTime DESC) DECLARE @start_position int, @end_position int SELECT @start_position = PATINDEX('% at%', @var) SELECT @end_position = PATINDEX('%kilometers%', @var) DECLARE @VALUE VARCHAR(10) = (Select SUBSTRING(@var, @start_position+5,5)) Select Top 1 @VALUE,RouteTable.Latitude,Routetable.Longitude,Alarms.ApplicationTime FROM Alarms INNER JOIN Routetable ON Routetable.Location BETWEEN FLOOR(@VALUE)-1 AND CEILING(@VALUE)+1 WHERE AlarmDefinitionId=139 ORDER BY EventTime DESC";
 
            conn = new SqlConnection(connetionString);
            try
            {
                conn.Open();
                cmd = new SqlCommand(sql, conn);
                reader = cmd.ExecuteReader();
                while (reader.Read())
                {

		    if(old_reader_val== reader.GetValue(0))//comparing old reader value with new reader value
			{
				//No change
			}
			else
			{
				//New reader has a new value.
			}			
		    old_reader_val = reader.GetValue(0);//assigning new reader value to old reader value again, so that again it can compare with new one.
			

                    MessageBox.Show("Leak Location" + " |    " + "Latitude" + "     |  " + "Longitude" + "    | " + "Leak Occured Time" + Environment.NewLine +  "        " + reader.GetValue(0) + "         | " + reader.GetValue(1) + "  |  " + reader.GetValue(2) + " |   " + reader.GetValue(3));
                }
                reader.Close();
                cmd.Dispose();
                conn.Close();
            }
            catch (Exception)
            {
                MessageBox.Show("Cannot Open Connection...! ");
            }
        System.Threading.Thread.Sleep(30 * 1000);
        //This will put a 30 second sleep.
        }//while loop ends ehere
        }
 
        private void aboutToolStripMenuItem_Click(object sender, EventArgs e)
        {
            About_LocationFinder formhelp = new About_LocationFinder();
            formhelp.Show();
        }
 
        private void exitToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.Close();
        }
 
        private void button1_Click(object sender, EventArgs e)
        {
 
        }
        private void Form1_Shown(Object sender, EventArgs e)
        {
 
        }
    }
}