How can we display a Webpage in Windows Forms using one url String

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C#

mapping

Hi I have developed a c# Windows forms application, which will connect to SQL and execute an SQL Query and shows the output data in a Message Box only when the data got changed from the previous output. Now i have developed a new form in the same Project and added web browser to the new form. SO now i have stored the output values of SQL in 2 variables namely lati and longi. Now i have passed them to my new form.

And when i execute my browser with that "url + lati+ longi" valu its not returning any output. Atleast it is not opening any browser form also.

I have tried the following in form2:-

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;

namespace LeakLocationFinder
{
    public partial class Maps : Form
    {
        public string lati;
        public string longi;
        public MainForm lat, lon;
        public Maps()
        {
            InitializeComponent();
        }
     

        private void Maps_Load(object sender, EventArgs e)
        {
            string url = "https://www.google.co.in/maps/place/";
            webBrowser1.Navigate(url + lati + "," + longi);
        }
    }
}

I have following in form 1:-

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 LeakLocationFinder
{
    public partial class MainForm : Form
    {
        public MainForm()
        {
            InitializeComponent();
        }
        public void MainForm_Load(object sender, EventArgs e)
        {
                String old_value = "";
                while (true)
                {
                    String connetionString = null;
                    SqlConnection conn;
                    SqlCommand cmd;
                    String sql = null;
                    SqlDataReader reader;

                    connetionString = "server=(local);database=modelDb;user id=sa;pwd=Esi2008*";
                    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,RouteTable.StationName,RouteTable.SectionName 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_value.ToString() != reader.GetValue(0).ToString())
                            {
                                MessageBox.Show("Leak Location:-" + "              " + reader.GetValue(0) + Environment.NewLine + "Latitude:-" + "                          " + reader.GetValue(1) + Environment.NewLine + "Longitude:-" + "                       " + reader.GetValue(2) + Environment.NewLine + "Leak Occured Time:-" + "       " + reader.GetValue(3) + Environment.NewLine + "Station Name:-" + "                 " + reader.GetValue(4) + Environment.NewLine + "Section Name:-" + "                " + reader.GetValue(5));
                                string lat = reader.GetValue(1).ToString();
                                string lon = reader.GetValue(2).ToString();
                                Maps form = new Maps();
                                {
                                    string lati = lat;
                                    string longi = lon;
                                };
                            }
                            else
                            {

                            }
                            old_value = reader.GetValue(0).ToString();
                       }
                        reader.Close();
                        cmd.Dispose();
                        conn.Close();
                    }
                    catch (Exception)
                    {
                      MessageBox.Show("Cannot Open Connection...! ");
                    }
                    System.Threading.Thread.Sleep(5 * 1000);
                }
            }
 
     private void aboutToolStripMenuItem_Click(object sender, EventArgs e)
        {
            About_LeakLocationFinder formhelp = new About_LeakLocationFinder();
            formhelp.Show();
        }

        private void exitToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.Close();
        }
    }
}

The url will be executed with url + lati value and longi value between lati and longi there will be a comma (",").
Please help