Creating a .Net desktop application that utilizes the WebBrowser control and integrates with the Google Maps

Question

Creating a .Net desktop application that utilizes the WebBrowser control and integrates with the Google Maps

I am currently working on a project that involves allowing users to input an address and then click a button. The entered address will be displayed on the WebBrowser control in a .net windows application. I am aware that JavaScript can be executed on the WebBrowser using WebBrowser1.DocumentText, followed by calling the script with WebBrowser1.Document.InvokeScript...

While I have encountered some challenges with this process, I am hopeful that someone here can guide me in the right direction.

CODE:

Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click

  Dim AddressMap As String

  AddressMap = AddressM.Text

  WebBrowser1.DocumentText = "<html><head><meta name='viewport' content='initial-scale=1.0, user-scalable=no' />" & _
    "<script type='text/javascript' src='http://maps.google.com.mx/maps/api/js?sensor=true&language;=es'></script>" & _
    "<script type='text/javascript'>" & _
    "var geocoder; var map;" & _
    "function initialize() " & _
    "{geocoder = new google.maps.Geocoder(); var myOptions = { zoom: 16, mapTypeId: google.maps.MapTypeId.ROADMAP()" & _
    "} var(address = " & AddressMap & ")" & _
    "geocoder.geocode({ 'address': address }, function (results, status) {" & _
                    "if (status == google.maps.GeocoderStatus.OK) {" & _
                        "map.setCenter(results[0].geometry.location);" & _
                        "var marker = new google.maps.Marker({" & _
                           " map: map," & _
                            "position: results[0].geometry.location });" & _
                    "} else {" & _
                    "}});" & _
     "map = new google.maps.Map(document.getElementById('map_canvas'), myOptions);}" & _
     "</script></head><div id='map_canvas' style='width:100%; height:100%'></div></body></html>"

   WebBrowser1.Document.InvokeScript("Initialize")

End Sub

Here is another code snippet which I believe should work, but it still triggers a script error "An error has occurred in the script on this page" Line 1 Char 124 Error Expected ';' Code 0 URL about.blank

 WebBrowser1.DocumentText = "<html><head><script type='text/javascript' src='http://maps.google.com.mx/maps/api/js?sensor=false&language;=es'></script> " +
                           "<script type='text/javascript'> " +
                           "var geocoder; " +
                           "var map; " +
                           "function initialize(address) { " +
                           "geocoder = new google.maps.Geocoder(); " +
                           "var myOptions = { zoom: 16 } " +
                           "geocoder.geocode({ 'address': address }, function (results, status) { map.setCenter(results[0].geometry.location); " +
                           "var marker = new google.maps.Marker({ map: map, position: results[0].geometry.location }); " +
                           "map = new google.maps.Map(document.getElementById('map_canvas'), myOptions); " +
                           "} " +
                           "</script> " +
                           "</head> " +
                           "<body> <div id='map_canvas' style='width:100%; height:100%'></div> </body> </html>"

WebBrowser1.Document.InvokeScript("initialize", New String() {AddressM.Text})

Appreciate any assistance provided.

Leo P.

This final piece of code is slightly different from the previous two and contains an if-else statement extracted from HTML that executes the Google Maps script.

WebBrowser1.DocumentText = "<html><head><script type='text/javascript' src='http://maps.google.com.mx/maps/api/js?sensor=false&language;=es'></script> " +
                       "<script type='text/javascript'> " +
                       "var geocoder; " +
                       "var map; " +
                       "function initialize() { " +
                       "geocoder = new google.maps.Geocoder(); " +
                       "var myOptions = { zoom: 16, mapTypeId: google.maps.MapTypeId.ROADMAP } " +
                       "var(address = 'Miami Beach, Florida') " +
                       "geocoder.geocode({ 'address': address }, " +
                       "function (results, status) { " +
                       "if (status == google.maps.GeocoderStatus.OK) { map.setCenter(results[0].geometry.location); " +
                       "var marker = new google.maps.Marker({ map: map, position: results[0].geometry.location }); " +
                       "} else { alert('Geocode was not successful !);}}); " +
                       "map = new google.maps.Map(document.getElementById('map_canvas'), myOptions); } " +
                       "</script> " +
                       "</head> " +
                       "<body> <div id='map_canvas' style='width:100%; height:100%'></div> </body> </html>"

        WebBrowser1.Document.InvokeScript("initialize")

Shown below is the HTML code:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />

<script type="text/javascript" src="http://maps.google.com.mx/maps/api/js?sensor=true&language=es"></script>
... (remaining HTML code)...

javascript .net visual-studio maps browser

Answer 1

Answer №1

Solution Implementation

HTML Instructions

To create an HTML page, save it in C:\page.html and use the following code:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />

<script type="text/javascript" src="http://maps.google.com.mx/maps/api/js?sensor=true&language=es"></script>
<script type="text/javascript">

    var geocoder;
    var map;


    function initialize(address) {

        geocoder = new google.maps.Geocoder();

        var myOptions = {
            zoom: 16,
            mapTypeId: google.maps.MapTypeId.ROADMAP
        }

        geocoder.geocode({ 'address': (address ? address : "Miami Beach, Flordia")}, function (results, status) {
            if (status == google.maps.GeocoderStatus.OK) {
                map.setCenter(results[0].geometry.location);
                var marker = new google.maps.Marker({
                    map: map,
                    position: results[0].geometry.location
                });
            } else {
                alert("Geocode was not successful for the following reason: " + status);
            }
        });

        map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
    }


    </script>
  </head>
  <body onload="initialize()">
    <div id="map_canvas" style="width:100%; height:100%"></div>

  </body>
</html>

Windows Form - C# Introduction

private void Form1_Load(object sender, EventArgs e)
{
    // Enter the URL (e.g. http://www.example.com/page.html or c:\page.html)
    webBrowser1.Url = new Uri(@"C:\page.html");
}

private void button1_Click(object sender, EventArgs e)
{
    webBrowser1.Document.InvokeScript("initialize", 
            new string[] { textBox1.Text });
}

You will need a form with these components named as follows: textBox1, button1, and webBrowser1.

Answer 2

Solution Implementation

HTML Instructions

To create an HTML page, save it in C:\page.html and use the following code:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />

<script type="text/javascript" src="http://maps.google.com.mx/maps/api/js?sensor=true&language=es"></script>
<script type="text/javascript">

    var geocoder;
    var map;


    function initialize(address) {

        geocoder = new google.maps.Geocoder();

        var myOptions = {
            zoom: 16,
            mapTypeId: google.maps.MapTypeId.ROADMAP
        }

        geocoder.geocode({ 'address': (address ? address : "Miami Beach, Flordia")}, function (results, status) {
            if (status == google.maps.GeocoderStatus.OK) {
                map.setCenter(results[0].geometry.location);
                var marker = new google.maps.Marker({
                    map: map,
                    position: results[0].geometry.location
                });
            } else {
                alert("Geocode was not successful for the following reason: " + status);
            }
        });

        map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
    }


    </script>
  </head>
  <body onload="initialize()">
    <div id="map_canvas" style="width:100%; height:100%"></div>

  </body>
</html>

Windows Form - C# Introduction

private void Form1_Load(object sender, EventArgs e)
{
    // Enter the URL (e.g. http://www.example.com/page.html or c:\page.html)
    webBrowser1.Url = new Uri(@"C:\page.html");
}

private void button1_Click(object sender, EventArgs e)
{
    webBrowser1.Document.InvokeScript("initialize", 
            new string[] { textBox1.Text });
}

You will need a form with these components named as follows: textBox1, button1, and webBrowser1.

Creating a .Net desktop application that utilizes the WebBrowser control and integrates with the Google Maps

Answer №1

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