StatusChangedEventArgs Classe

Définition

public ref class StatusChangedEventArgs sealed

/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
class StatusChangedEventArgs final

[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
public sealed class StatusChangedEventArgs

Public NotInheritable Class StatusChangedEventArgs

Héritage

Object Platform::Object IInspectable StatusChangedEventArgs

Attributs

ContractVersionAttribute MarshalingBehaviorAttribute

Configuration requise pour Windows

Exemples

Cet exemple de code montre comment l’événement StatusChanged est géré. L’objet Geolocator déclenche l’événement StatusChanged afin d’indiquer que les paramètres d’emplacement de l’utilisateur ont changé. Cet événement transmet l’état correspondant par le biais de la propriété Status de l’argument (de type PositionStatus). Notez que cette méthode n’est pas appelée à partir du thread d’interface utilisateur et que l’objet Dispatcher invoque les modifications de l’interface utilisateur. Pour plus d’informations, voir Obtenir l’emplacement actuel.

using Windows.UI.Core;
...
async private void OnStatusChanged(Geolocator sender, StatusChangedEventArgs e)
{
    await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
    {
        // Show the location setting message only if status is disabled.
        LocationDisabledMessage.Visibility = Visibility.Collapsed;

        switch (e.Status)
        {
            case PositionStatus.Ready:
                // Location platform is providing valid data.

                // notify user: Location platform is ready
                break;

            case PositionStatus.Initializing:
                // Location platform is attempting to acquire a fix. 

                // notify user: Location platform is attempting to obtain a position
                break;

            case PositionStatus.NoData:
                // Location platform could not obtain location data.

                // notify user: Not able to determine the location
                break;

            case PositionStatus.Disabled:
                // The permission to access location data is denied by the user or other policies.

                // notify user: Access to location is denied

                // Clear cached location data if any
                break;

            case PositionStatus.NotInitialized:
                // The location platform is not initialized. This indicates that the application 
                // has not made a request for location data.

                // notify user: No request for location is made yet
                break;

            case PositionStatus.NotAvailable:
                // The location platform is not available on this version of the OS.

                // notify user: Location is not available on this version of the OS
                break;

            default:
                // unknown case
                break;
        }
    });
}

Remarques

Cet objet est l’argument passé au gestionnaire pour l’événement StatusChanged .

Propriétés

S’applique à

Voir aussi

• Exemple de géolocalisation (Windows 10)