/// <summary>
/// This method is called upon when a claim request is made on instance 2. If a retain request was placed on the device it rejects the new claim.
/// </summary>
/// <param name="instance"></param>
/// <returns></returns>
async void claimedBarcodeScannerInstance2_ReleaseDeviceRequested(object sender, ClaimedBarcodeScanner e)
{
await MainPage.Current.Dispatcher.RunAsync(
Windows.UI.Core.CoreDispatcherPriority.Normal,
() =>
{
UpdateOutput(String.Format("\nReleaseDeviceRequested ({0})", claimedBarcodeScannerInstance2.DeviceId));
//check if the instance wants to retain the device
if (Retain2.IsChecked == true)
{
try
{
//Retain the device
claimedBarcodeScannerInstance2.RetainDevice();
UpdateOutput(String.Format("\t(Scanner Retained)"));
}
catch (Exception exception)
{
UpdateOutput(String.Format("\t(retain failed) ({0})", exception.ToString()));
}
}
//Release the device
else
{
claimedBarcodeScannerInstance2.Dispose();
claimedBarcodeScannerInstance2 = null;
UpdateOutput("Scanner Released.");
}
}
);
}
/// <summary>
/// This method is called upon when a claim request is made on instance 2. If a retain request was placed on the device it rejects the new claim.
/// </summary>
/// <param name="instance"></param>
/// <returns></returns>
async void claimedBarcodeScannerInstance2_ReleaseDeviceRequested(object sender, ClaimedBarcodeScanner e)
{
await MainPage.Current.Dispatcher.RunAsync(
Windows.UI.Core.CoreDispatcherPriority.Normal,
() =>
{
//check if the instance wants to retain the device
if (Retain2.IsChecked == true)
{
try
{
//Retain the device
claimedBarcodeScannerInstance2.RetainDevice();
}
catch (Exception exception)
{
rootPage.NotifyUser("Retain instance 1 failed: " + exception.Message, NotifyType.ErrorMessage);
}
}
//Release the device
else
{
claimedBarcodeScannerInstance2.Dispose();
claimedBarcodeScannerInstance2 = null;
if (barcodeScannerInstance2 != null)
{
barcodeScannerInstance2.Dispose();
barcodeScannerInstance2 = null;
}
}
}
);
}
async System.Threading.Tasks.Task resetScanner()
{
if (_ClaimedBarcodeScanner != null)
{
if (_autoScan)
{
await _ClaimedBarcodeScanner.StopSoftwareTriggerAsync();
}
_ClaimedBarcodeScanner.DataReceived -= _ClaimedBarcodeScanner_DataReceived;
_ClaimedBarcodeScanner.ReleaseDeviceRequested -= _ClaimedBarcodeScanner_ReleaseDeviceRequested;
_ClaimedBarcodeScanner.Dispose();
_ClaimedBarcodeScanner = null;
}
_BarcodeScanner = null;
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
//UI code here
textBox_Scan.Background = new SolidColorBrush(Windows.UI.Colors.White);
textBox_Scan.Text = "";
textBox_Time.Text = "";
//play sound at end of Release
});
App.mySoundEffects.Play(AppSoundEffects.SoundEfxEnum.ComputerError);
}
/// <summary>
/// Reset the Scenario state
/// </summary>
private void ResetTheScenarioState()
{
if (claimedScanner != null)
{
// Detach the event handlers
claimedScanner.DataReceived -= claimedScanner_DataReceived;
claimedScanner.ReleaseDeviceRequested -= claimedScanner_ReleaseDeviceRequested;
// Release the Barcode Scanner and set to null
claimedScanner.Dispose();
claimedScanner = null;
}
if (scanner != null)
{
scanner.Dispose();
scanner = null;
}
// Reset the UI if we are still the current page.
if (Frame.Content == this)
{
rootPage.NotifyUser("Click the start scanning button to begin.", NotifyType.StatusMessage);
this.ScenarioOutputScanData.Text = "No data";
this.ScenarioOutputScanDataLabel.Text = "No data";
this.ScenarioOutputScanDataType.Text = "No data";
// reset the button state
ScenarioEndScanButton.IsEnabled = false;
ScenarioStartScanButton.IsEnabled = true;
}
}
/// <summary>
/// Close the scanners and stop the preview.
/// </summary>
private async Task CloseScannerResourcesAsync()
{
claimedScanner?.Dispose();
claimedScanner = null;
selectedScanner?.Dispose();
selectedScanner = null;
SoftwareTriggerStarted = false;
RaisePropertyChanged(nameof(SoftwareTriggerStarted));
if (IsPreviewing)
{
if (mediaCapture != null)
{
await mediaCapture.StopPreviewAsync();
mediaCapture.Dispose();
mediaCapture = null;
}
// Allow the display to go to sleep.
displayRequest.RequestRelease();
IsPreviewing = false;
RaisePropertyChanged(nameof(IsPreviewing));
}
}
/// <summary>
/// Reset the Scenario state
/// </summary>
private void ResetTheScenarioState()
{
if (claimedScanner != null)
{
// Detach the event handlers
claimedScanner.DataReceived -= claimedScanner_DataReceived;
claimedScanner.ReleaseDeviceRequested -= claimedScanner_ReleaseDeviceRequested;
// Release the Barcode Scanner and set to null
claimedScanner.Dispose();
claimedScanner = null;
}
if (scanner != null)
{
scanner.Dispose();
scanner = null;
}
// Reset the strings in the UI
rootPage.NotifyUser("Click the start scanning button to begin.", NotifyType.StatusMessage);
this.ScenarioOutputScanData.Text = "No data";
this.ScenarioOutputScanDataLabel.Text = "No data";
this.ScenarioOutputScanDataType.Text = "No data";
// reset the button state
SetActiveSymbologiesButton.IsEnabled = false;
ScenarioEndScanButton.IsEnabled = false;
ScenarioStartScanButton.IsEnabled = true;
// reset symbology list
listOfSymbologies.Clear();
}
/// <summary>
/// Reset the Scenario state
/// </summary>
private async void ResetTheScenarioState()
{
if (claimedScanner != null)
{
// Detach the event handlers
claimedScanner.DataReceived -= claimedScanner_DataReceived;
claimedScanner.ReleaseDeviceRequested -= claimedScanner_ReleaseDeviceRequested;
// Release the Barcode Scanner and set to null
claimedScanner.Dispose();
claimedScanner = null;
}
scanner = null;
await CleanupCameraAsync();
// Reset the strings in the UI
rootPage.NotifyUser("Click the start scanning button to begin.", NotifyType.StatusMessage);
this.ScenarioOutputScanData.Text = "No data";
this.ScenarioOutputScanDataLabel.Text = "No data";
this.ScenarioOutputScanDataType.Text = "No data";
// reset the button state
ScenarioEndScanButton.IsEnabled = false;
ScenarioStartSWTriggerButton.IsEnabled = false;
ScenarioStopSWTriggerButton.IsEnabled = false;
ScenarioStartScanButton.IsEnabled = true;
}
private async void buttonEnable_Click(object sender, RoutedEventArgs e)
{
scanner = await BarcodeScanner.GetDefaultAsync();
if (claimedScanner != null)
{
claimedScanner.Dispose();
}
claimedScanner = await scanner.ClaimScannerAsync();
claimedScanner.DataReceived += ClamedScanner_DataReceived;
await claimedScanner.EnableAsync();
claimedScanner.IsDecodeDataEnabled = true;
await claimedScanner.SetActiveSymbologiesAsync(new uint[] {
BarcodeSymbologies.Aztec,
BarcodeSymbologies.AusPost,
BarcodeSymbologies.CanPost,
BarcodeSymbologies.Codabar,
BarcodeSymbologies.Codablock128,
BarcodeSymbologies.Code11,
BarcodeSymbologies.Code128,
BarcodeSymbologies.Code39,
BarcodeSymbologies.Code39Ex,
BarcodeSymbologies.DataMatrix,
BarcodeSymbologies.Ean13,
BarcodeSymbologies.Ean8,
BarcodeSymbologies.Gs1128,
BarcodeSymbologies.Gs1DatabarType1,
BarcodeSymbologies.Gs1DatabarType2,
BarcodeSymbologies.Gs1DatabarType3,
BarcodeSymbologies.Pdf417,
BarcodeSymbologies.Qr,
BarcodeSymbologies.OcrB,
BarcodeSymbologies.UccEan128,
BarcodeSymbologies.Upca,
BarcodeSymbologies.Upce,
BarcodeSymbologies.UsPostNet,
});
changeButtonEnable(true);
}
internal void Reset()
{
if (claimedScanner != null)
{
// Detach the event handlers
claimedScanner.DataReceived -= ClaimedScanner_DataReceived;
claimedScanner.ReleaseDeviceRequested -= claimedScanner_ReleaseDeviceRequested;
// Release the Barcode Scanner and set to null
claimedScanner.Dispose();
claimedScanner = null;
}
scanner = null;
}
public async Task <bool> ReleaseScannerAsync(bool exit)
{
try
{
if (claimedScanner != null)
{
claimedScanner.DataReceived -= ClaimedScanner_DataReceivedAsync;
claimedScanner.ReleaseDeviceRequested -= OnClaimedScannerReleaseDeviceRequested;
claimedScanner.IsDecodeDataEnabled = false;
await claimedScanner.DisableAsync();
claimedScanner.Dispose();
}
scanner = null;
}
catch (Exception ex)
{
//Console.WriteLine(ex.Message);
return(false);
}
return(true);
}
public bool Deactivate()
{
if (claimedScanner != null)
{
try
{
// Detach the event handlers
claimedScanner.DataReceived -= claimedScanner_DataReceived;
claimedScanner.ReleaseDeviceRequested -= claimedScanner_ReleaseDeviceRequested;
// Release the Barcode Scanner and set to null
claimedScanner.Dispose();
claimedScanner = null;
}
catch (Exception)
{
}
}
scanner = null;
return(true);
}
/// <summary>
/// Reset the Scenario state
/// </summary>
private void ResetTheScenarioState()
{
if (claimedScanner != null)
{
// Detach the event handlers
claimedScanner.DataReceived -= claimedScanner_DataReceived;
claimedScanner.ReleaseDeviceRequested -= claimedScanner_ReleaseDeviceRequested;
// Release the Barcode Scanner and set to null
claimedScanner.Dispose();
claimedScanner = null;
}
scanner = null;
// Reset the strings in the UI
UpdateOutput("Click the Start Scanning Button.");
this.ScenarioOutputScanData.Text = "No data";
this.ScenarioOutputScanDataLabel.Text = "No data";
this.ScenarioOutputScanDataType.Text = "No data";
// reset the button state
ScenarioEndScanButton.IsEnabled = false;
ScenarioStartScanButton.IsEnabled = true;
}