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Event Examples

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Note

Bing Maps Web Control SDK retirement

Bing Maps Web Control SDK is deprecated and will be retired. Free (Basic) account customers can continue to use Bing Maps Web Control SDK until June 30th, 2025. Enterprise account customers can continue to use Bing Maps Web Control SDK until June 30th, 2028. To avoid service disruptions, all implementations using Bing Maps Web Control SDK will need to be updated to use Azure Maps Web SDK by the retirement date that applies to your Bing Maps for Enterprise account type. For detailed migration guidance, see Migrate from Bing Maps Web Control SDK and Migrate Bing Maps Enterprise applications to Azure Maps with GitHub Copilot.

Azure Maps is Microsoft's next-generation maps and geospatial services for developers. Azure Maps has many of the same features as Bing Maps for Enterprise, and more. To get started with Azure Maps, create a free Azure subscription and an Azure Maps account. For more information about azure Maps, see Azure Maps Documentation. For migration guidance, see Bing Maps Migration Overview.

The Bing Maps control provides many events to allow your application to respond to user actions. The Map, Pushpin, Polyline, Polygon and Layer classes along with many of the modules all have events. Here are a couple of examples of where you may want to use events:

  • If a user clicks on a shape, trigger an event that opens an infobox.
  • If the map style changes you may want to change the color of items overlaid on the map so that they stand out better -- for example, using light colors on aerial maps and dark colors on road maps.
  • If the user has moved the map you may wish to load in new data for the new viewing area.

Examples

Basic Example

The following example shows how to add a viewchange event to the map and have the location information of the center of the map displayed and updated as the map moves.

<!DOCTYPE html>
<html>
<head>
    <title></title>
    <meta charset="utf-8" />
	<script type='text/javascript'>
    function GetMap() {
        var map = new Microsoft.Maps.Map('#myMap', {
            credentials: ‘Your Bing Maps Key’
        });

        Microsoft.Maps.Events.addHandler(map, 'viewchange', function (e) {
            document.getElementById('output').innerHTML = map.getCenter();
        });
    }
    </script>
    <script type='text/javascript' src='http://www.bing.com/api/maps/mapcontrol?callback=GetMap' async defer></script>
</head>
<body>
    <div id="myMap" style="position:relative;width:600px;height:400px;"></div><br/>
    <div id="output"></div>
</body>
</html>

As you pan the map you will notice that the location information for the center of the map will appear below the map.

Screenshot of a Bing map showing a map of the Redmond, Washington, area with a caption showing the Map Location information below.

Tip: Some of the events, such as the mouse related events, pass an event argument to the event handler. This event argument can contain important information such as a reference to the target object the event is attached to, or the pixel coordinates where the mouse event occurred. If you want to get the coordinates of a mouse event, use the location property of the event argument.