GeoCoordinateWatcher.TryStart Method (Boolean, TimeSpan)

.NET Framework (current version)
 

Initiates the acquisition of data from the current location provider. This method returns synchronously.

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

public bool TryStart(
	bool suppressPermissionPrompt,
	TimeSpan timeout
)

Parameters

suppressPermissionPrompt
Type: System.Boolean

true to suppress the permission dialog box; false to display the permission dialog box.

timeout
Type: System.TimeSpan

Time in milliseconds to wait for the location provider to start before timing out.

Return Value

Type: System.Boolean

true if data acquisition is started within the time period specified by timeout; otherwise, false.

This method blocks execution of the calling thread during the time period specified by timeout. Use caution when calling TryStart from the user interface thread of your application.

The following example demonstrates how to call TryStart.

using System;
using System.Device.Location;

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

        static void GetLocationProperty()
        {
            GeoCoordinateWatcher watcher = new GeoCoordinateWatcher();

            // Do not suppress prompt, and wait 1000 milliseconds to start.
            watcher.TryStart(false, TimeSpan.FromMilliseconds(1000));

            GeoCoordinate coord = watcher.Position.Location;

            if (coord.IsUnknown != true)
            {
                Console.WriteLine("Lat: {0}, Long: {1}",
                    coord.Latitude,
                    coord.Longitude);
            }
            else
            {
                Console.WriteLine("Unknown latitude and longitude.");
            }
        }
    }
}

.NET Framework
Available since 4.0
Windows Phone Silverlight
Available since 7.0
Return to top
Show: