Is it possible to detect a mobile browser's GPS location? [duplicate]

Question

I am making a web site targeted at mobile phones and would like to get the user's current GPS latitude/longitude when they visit my default page so I can show them results in their area. Is this possible using ASP.NET?

See Also

Get position data from mobile browser

Answer 1

Yes, you can do it with JavaScript and submit results back to server:

        function onPositionUpdate(position)
        {
            var lat = position.coords.latitude;
            var lng = position.coords.longitude;
            alert("Current position: " + lat + " " + lng);
        }

        if(navigator.geolocation)
            navigator.geolocation.getCurrentPosition(onPositionUpdate);
        else
            alert("navigator.geolocation is not available");

Answer 2

There are services that will give you a location based on IP address. It won't be as precise as the GPS data but without having an application installed on the phone it may be as close as you are going to get.