MagneticStripeReader.GetDefaultAsync Method
Definition
Important
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Returns the first magnetic stripe reader found.
public:
static IAsyncOperation<MagneticStripeReader ^> ^ GetDefaultAsync();/// [Windows.Foundation.Metadata.RemoteAsync]
static IAsyncOperation<MagneticStripeReader> GetDefaultAsync();[Windows.Foundation.Metadata.RemoteAsync]
public static IAsyncOperation<MagneticStripeReader> GetDefaultAsync();function getDefaultAsync()Public Shared Function GetDefaultAsync () As IAsyncOperation(Of MagneticStripeReader)Returns
The first magnetic stripe reader found. Returns a null object in the following cases:
- A device is not found.
- Access denied to the existing device. The user can deny access to a device, which is not treated as an exception.
- Attributes
Examples
// Creates the magnetic stripe reader.
task<void> Scenario1::CreateDefaultReaderObject()
{
return create_task(MagneticStripeReader::GetDefaultAsync()).then([this] (MagneticStripeReader^ reader)
{
_reader = reader;
if (_reader != nullptr)
{
// UpdateReaderStatusTextBlock("Magnetic stripe reader created.");
// UpdateReaderStatusTextBlock("Device Id is:" + _reader->DeviceId);
}
else
{
// UpdateReaderStatusTextBlock("Magnetic stripe reader not found. Connect a magnetic stripe reader.");
}
});
}
//Creates a magnetic stripe reader.
private async Task<bool> CreateDefaultMagneticStripeReaderObject()
{
if (_reader == null)
{
_reader = await MagneticStripeReader.GetDefaultAsync();
if (_reader != null)
{
// UpdateReaderStatusTextBlock("Magnetic stripe reader created.");
// UpdateReaderStatusTextBlock("Device Id is:" + _reader.DeviceId);
}
else
{
// UpdateReaderStatusTextBlock("Magnetic stripe reader not found. Connect a magnetic stripe reader.");
return false;
}
}
return true;
}