public static string GetDataLabelString(IBuffer data, uint scanDataType)
{
// Only certain data types contain encoded text.
// To keep this simple, we'll just decode a few of them.
if (data == null)
{
return("No data");
}
// This is not an exhaustive list of symbologies that can be converted to a string.
if (scanDataType == BarcodeSymbologies.Upca ||
scanDataType == BarcodeSymbologies.UpcaAdd2 ||
scanDataType == BarcodeSymbologies.UpcaAdd5 ||
scanDataType == BarcodeSymbologies.Upce ||
scanDataType == BarcodeSymbologies.UpceAdd2 ||
scanDataType == BarcodeSymbologies.UpceAdd5 ||
scanDataType == BarcodeSymbologies.Ean8 ||
scanDataType == BarcodeSymbologies.TfStd)
{
// The UPC, EAN8, and 2 of 5 families encode the digits 0..9
// which are then sent to the app in a UTF8 string (like "01234").
return(CryptographicBuffer.ConvertBinaryToString(BinaryStringEncoding.Utf8, data));
}
// Some other symbologies (typically 2-D symbologies) contain binary data that
// should not be converted to text.
return(string.Format("Decoded data unavailable. Raw label data: {0}", DataHelpers.GetDataString(data)));
}
/// <summary>
/// Scan data was received from the selected scanner.
/// </summary>
/// <param name="sender"></param>
/// <param name="args"></param>
private async void ClaimedScanner_DataReceived(ClaimedBarcodeScanner sender, BarcodeScannerDataReceivedEventArgs args)
{
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
ScenarioOutputScanDataLabel.Text = DataHelpers.GetDataLabelString(args.Report.ScanDataLabel, args.Report.ScanDataType);
ScenarioOutputScanData.Text = DataHelpers.GetDataString(args.Report.ScanData);
ScenarioOutputScanDataType.Text = BarcodeSymbologies.GetName(args.Report.ScanDataType);
});
}
/// <summary>
/// Event handler for the DataReceived event fired when a barcode is scanned by the barcode scanner
/// </summary>
/// <param name="sender"></param>
/// <param name="args"> Contains the BarcodeScannerReport which contains the data obtained in the scan</param>
async void claimedScanner_DataReceived(ClaimedBarcodeScanner sender, BarcodeScannerDataReceivedEventArgs args)
{
// need to update the UI data on the dispatcher thread.
// update the UI with the data received from the scan.
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
// read the data from the buffer and convert to string.
ScenarioOutputScanDataLabel.Text = DataHelpers.GetDataLabelString(args.Report.ScanDataLabel, args.Report.ScanDataType);
ScenarioOutputScanData.Text = DataHelpers.GetDataString(args.Report.ScanData);
ScenarioOutputScanDataType.Text = BarcodeSymbologies.GetName(args.Report.ScanDataType);
});
}
/// <summary>
/// This is an event handler for the claimed scanner Instance 2 when it scans and recieves data
/// </summary>
/// <param name="sender"></param>
/// <param name="args"></param>
private async void claimedBarcodeScannerInstance2_DataReceived(ClaimedBarcodeScanner sender, BarcodeScannerDataReceivedEventArgs args)
{
await MainPage.Current.Dispatcher.RunAsync(
Windows.UI.Core.CoreDispatcherPriority.Normal,
() =>
{
ScanDataType2.Text = BarcodeSymbologies.GetName(args.Report.ScanDataType);
DataLabel2.Text = DataHelpers.GetDataLabelString(args.Report.ScanDataLabel, args.Report.ScanDataType);
ScanData2.Text = DataHelpers.GetDataString(args.Report.ScanData);
rootPage.NotifyUser("Instance 2 received data from the barcode scanner.", NotifyType.StatusMessage);
}
);
}
