MagneticStripeReader.ClaimReaderAsync Method
Definition
Important
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Attempts to get an exclusive access to the magnetic stripe reader.
public:
virtual IAsyncOperation<ClaimedMagneticStripeReader ^> ^ ClaimReaderAsync() = ClaimReaderAsync;/// [Windows.Foundation.Metadata.RemoteAsync]
IAsyncOperation<ClaimedMagneticStripeReader> ClaimReaderAsync();[Windows.Foundation.Metadata.RemoteAsync]
public IAsyncOperation<ClaimedMagneticStripeReader> ClaimReaderAsync();function claimReaderAsync()Public Function ClaimReaderAsync () As IAsyncOperation(Of ClaimedMagneticStripeReader)Returns
When the method completes, it returns a ClaimedMagneticStripeReader or it returns null if the operation fails to claim a magnetic stripe reader.
- Attributes
Examples
// Claims the magnetic stripe reader for exclusive use
task<void> Scenario1::ClaimReader()
{
return create_task(_reader->ClaimReaderAsync()).then([this] (ClaimedMagneticStripeReader^ claimedReader)
{
_claimedReader = claimedReader;
if (_claimedReader != nullptr)
{
// UpdateReaderStatusTextBlock("Magnetic stripe reader claimed successfully.");
}
else
{
// UpdateReaderStatusTextBlock("Failed to claim the magnetic stripe reader.");
}
});
}
// Claims the magnetic stripe reader for exclusive use.
private async Task<bool> ClaimReader()
{
if (_claimedReader == null)
{
_claimedReader = await _reader.ClaimReaderAsync();
if (_claimedReader != null)
{
// UpdateReaderStatusTextBlock("Magnetic stripe reader claimed successfully.");
}
else
{
// UpdateReaderStatusTextBlock("Failed to claim a magnetic stripe reader.");
return false;
}
}
return true;
}