BarcodeScanner.ClaimScannerAsync Method
Definition
Important
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Attempts to get an exclusive access to the barcode scanner.
public:
virtual IAsyncOperation<ClaimedBarcodeScanner ^> ^ ClaimScannerAsync() = ClaimScannerAsync;/// [Windows.Foundation.Metadata.RemoteAsync]
IAsyncOperation<ClaimedBarcodeScanner> ClaimScannerAsync();[Windows.Foundation.Metadata.RemoteAsync]
public IAsyncOperation<ClaimedBarcodeScanner> ClaimScannerAsync();function claimScannerAsync()Public Function ClaimScannerAsync () As IAsyncOperation(Of ClaimedBarcodeScanner)Returns
When the method completes, it returns a ClaimedBarcodeScanner.
- Attributes
Examples
// Claims the barcode scanner for exclusive use
task<void> Scenario1::ClaimScanner()
{
return create_task(scanner->ClaimScannerAsync()).then([this] (ClaimedBarcodeScanner^ _claimedScanner)
{
this->claimedScanner = _claimedScanner;
if (claimedScanner != nullptr)
{
// UpdateOutput("Barcode scanner claimed successfully.");
}
else
{
// UpdateOutput("Failed to claim barcode scanner.");
}
});
}
// Claims the barcode scanner for exclusive use.
private async Task<bool> ClaimScanner()
{
if (claimedScanner == null)
{
claimedScanner = await scanner.ClaimScannerAsync();
if (claimedScanner != null)
{
// UpdateOutput("Barcode scanner claimed successfully.");
}
else
{
// UpdateOutput("Failed to claim the barcode scanner.");
return false;
}
}
return true;
}