MagneticStripeReader.ClaimReaderAsync 메서드

정의

네임스페이스:

Windows.Devices.PointOfService

자기 줄무늬 판독기 전용 액세스를 시도합니다.

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)

반환

IAsyncOperation<ClaimedMagneticStripeReader>

메서드가 완료되면 ClaimedMagneticStripeReader 를 반환하거나 작업이 자기 스트라이프 판독기를 클레임하지 못하면 null을 반환합니다.

특성

RemoteAsyncAttribute

예제

// 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;
}

추가 정보

• 자기 줄무늬 판독기 샘플(Windows 10)