ClaimedMagneticStripeReader.ReleaseDeviceRequested イベント

定義

名前空間:

Windows.Devices.PointOfService

デバイスが排他的要求を解放する要求を取得したときに発生します。

// Register
event_token ReleaseDeviceRequested(EventHandler<ClaimedMagneticStripeReader> const& handler) const;

// Revoke with event_token
void ReleaseDeviceRequested(event_token const* cookie) const;

// Revoke with event_revoker
ClaimedMagneticStripeReader::ReleaseDeviceRequested_revoker ReleaseDeviceRequested(auto_revoke_t, EventHandler<ClaimedMagneticStripeReader> const& handler) const;

public event System.EventHandler<ClaimedMagneticStripeReader> ReleaseDeviceRequested;

function onReleaseDeviceRequested(eventArgs) { /* Your code */ }
claimedMagneticStripeReader.addEventListener("releasedevicerequested", onReleaseDeviceRequested);
claimedMagneticStripeReader.removeEventListener("releasedevicerequested", onReleaseDeviceRequested);
- or -
claimedMagneticStripeReader.onreleasedevicerequested = onReleaseDeviceRequested;

Public Custom Event ReleaseDeviceRequested As EventHandler(Of ClaimedMagneticStripeReader) 

イベントの種類

EventHandler<ClaimedMagneticStripeReader>

EventHandler<ClaimedMagneticStripeReader>

例

次の例は、イベント ハンドラーを設定する方法を示しています。

void Scenario1::ScenarioStartReadButton_Click(Platform::Object^ sender, Windows::UI::Xaml::RoutedEventArgs^ e)
{
    create_task(CreateDefaultReaderObject()).then([this](void)
    {
        if (_reader != nullptr)
        {
            // Claim the magnetic stripe reader for exclusive use by your application.
            create_task(ClaimReader()).then([this](void)
            {
                if (_claimedReader)
                {
                    // Add a release device requested event handler. If this event is not handled,  
                    // another app can claim the magnetic stripe reader.
                    _releaseDeviceRequestedToken = _claimedReader->ReleaseDeviceRequested::add(ref new EventHandler<ClaimedMagneticStripeReader^>(this, &Scenario1::OnReleaseDeviceRequested));

                    // Add a data receive event handler.
                    _bankCardDataReceivedToken =  _claimedReader->BankCardDataReceived::add(ref new TypedEventHandler<ClaimedMagneticStripeReader^, MagneticStripeReaderBankCardDataReceivedEventArgs^>(this, &Scenario1::OnBankCardDataReceived));
                    UpdateReaderStatusTextBlock("Attached the BankCardDataReceived event handler..");

                    // Set the app to decode the raw data from the magnetic stripe reader.
                    _claimedReader->IsDecodeDataEnabled = true;

                    // Enable the magnetic stripe reader.
                    create_task(EnableReader()).then([this](void)
                    {
                        UpdateReaderStatusTextBlock("Ready to Swipe..");

                        // Reset the button state
                        ScenarioEndReadButton->IsEnabled = true;
                        ScenarioStartReadButton->IsEnabled = false;

                    });
                }
            });
        }
    });
}

private async void ScenarioStartReadButton_Click(object sender, RoutedEventArgs e)
{
    if (await CreateDefaultMagneticStripeReaderObject())
    {
        if (_reader != null)
        {
            // Claim the reader for exclusive use by your application.
            if (await ClaimReader())
            {
                if (_claimedReader != null)
                {
                    /// Add a release device requested event handler. If this event is not handled,  
                    // another app can claim the magnetic stripe reader.
                    _claimedReader.ReleaseDeviceRequested += OnReleaseDeviceRequested;

                    // Add a data receive event handler.
                    _claimedReader.BankCardDataReceived += OnBankCardDataReceived;
                    UpdateReaderStatusTextBlock("Attached the BankCardDataReceived Event handler..");

                    // Set the app to decode the raw data from the magnetic stripe reader.
                    _claimedReader.IsDecodeDataEnabled = true;

                    // Enable the magnetic stripe reader.
                    if (await EnableReader())
                    {
                        UpdateReaderStatusTextBlock("Ready to Swipe..");

                        // Reset the button state
                        ScenarioEndReadButton.IsEnabled = true;
                        ScenarioStartReadButton.IsEnabled = false;
                    }
                }
            }
        }
    }
}

void Scenario1::OnReleaseDeviceRequested(Platform::Object ^sender, Windows::Devices::PointOfService::ClaimedMagneticStripeReader ^args)
{
    // Always retain the device. If it is not retained, this exclusive claim will be lost.
    args->RetainDevice(); 
}

void OnReleaseDeviceRequested(object sender, ClaimedMagneticStripeReader args)
{
    // Always retain the device. If it is not retained, this exclusive claim will be lost.
    args.RetainDevice(); 
}

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