GeoCoordinate.IsUnknown Property

.NET Framework (current version)
 

Gets a value that indicates whether the GeoCoordinate does not contain latitude or longitude data.

Namespace:   System.Device.Location
Assembly:  System.Device (in System.Device.dll)

public bool IsUnknown { get; }

Property Value

Type: System.Boolean

true if the GeoCoordinate does not contain latitude or longitude data; otherwise, false.

A GeoCoordinate that does not contain latitude or longitude data is equal to Unknown.

The following code example verifies whether the GeoCoordinate that corresponds to a location is Unknown before printing out its latitude and longitude.

using System;
using System.Device.Location;

namespace GetLocationPropertyHandleUnknown
{
    class Program
    {
        static void Main(string[] args)
        {
            GetLocationPropertyHandleUnknown();
        }

        static void GetLocationPropertyHandleUnknown()
        {
            GeoCoordinateWatcher watcher = new GeoCoordinateWatcher();
            watcher.TryStart(false, TimeSpan.FromMilliseconds(1000));

            if (watcher.Position.Location.IsUnknown != true)
            {
                GeoCoordinate coord = watcher.Position.Location;

                Console.WriteLine("Lat: {0}, Long: {1}",
                    coord.Latitude,
                    coord.Longitude);
            }
            else
            {
                Console.WriteLine("Unknown");
            }

        }

    }
}

.NET Framework
Available since 4.0
Windows Phone Silverlight
Available since 7.0
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