/// <summary>
/// This is the click handler for the 'ScenarioStartScanningInstance1' button. It initiates creation of scanner instance 1.
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
///
private async void ButtonStartScanningInstance1_Click(object sender, RoutedEventArgs e)
{
//Get the handle to the default scanner
if (await CreateDefaultScannerObjectAsync(BarcodeScannerInstance.Instance1))
{
//Claim the scanner
if (await ClaimBarcodeScannerAsync(BarcodeScannerInstance.Instance1))
{
//add the event handlers
claimedBarcodeScannerInstance1.ReleaseDeviceRequested += claimedBarcodeScannerInstance1_ReleaseDeviceRequested;
claimedBarcodeScannerInstance1.DataReceived += claimedBarcodeScannerInstance1_DataReceived;
claimedBarcodeScannerInstance1.IsDecodeDataEnabled = true;
//Enable the Scanner
if (await EnableBarcodeScannerAsync(BarcodeScannerInstance.Instance1))
{
//Set the UI state
ResetUI();
SetUI(BarcodeScannerInstance.Instance1);
}
}
else
{
if (barcodeScannerInstance1 != null)
{
barcodeScannerInstance1.Dispose();
barcodeScannerInstance1 = null;
}
}
}
}
/// <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>
/// Event Handler for Start Scan Button Click.
/// Sets up the barcode scanner to be ready to receive the data events from the scan.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private async void ScenarioStartScanButton_Click(object sender, RoutedEventArgs e)
{
ScenarioStartScanButton.IsEnabled = false;
rootPage.NotifyUser("Acquiring barcode scanner object.", NotifyType.StatusMessage);
// create the barcode scanner.
scanner = await DeviceHelpers.GetFirstBarcodeScannerAsync();
if (scanner != null)
{
// after successful creation, list supported symbologies
IReadOnlyList <uint> supportedSymbologies = await scanner.GetSupportedSymbologiesAsync();
foreach (uint symbology in supportedSymbologies)
{
listOfSymbologies.Add(new SymbologyListEntry(symbology));
}
// Claim the scanner for exclusive use and enable it so raises DataReceived events.
claimedScanner = await scanner.ClaimScannerAsync();
if (claimedScanner != null)
{
// It is always a good idea to have a release device requested event handler.
// If this event is not handled, then another app can claim ownership of the barcode scanner.
claimedScanner.ReleaseDeviceRequested += claimedScanner_ReleaseDeviceRequested;
// after successfully claiming, attach the datareceived event handler.
claimedScanner.DataReceived += claimedScanner_DataReceived;
// Ask the platform to decode the data by default. When this is set, the platform
// will decode the raw data from the barcode scanner and include in the
// BarcodeScannerReport.ScanDataLabel and ScanDataType in the DataReceived event.
claimedScanner.IsDecodeDataEnabled = true;
// Enable the scanner so it raises DataReceived events.
// Do this after adding the DataReceived event handler.
await claimedScanner.EnableAsync();
// reset the button state
ScenarioEndScanButton.IsEnabled = true;
SetActiveSymbologiesButton.IsEnabled = true;
rootPage.NotifyUser("Ready to scan. Device ID: " + claimedScanner.DeviceId, NotifyType.StatusMessage);
}
else
{
scanner.Dispose();
scanner = null;
ScenarioStartScanButton.IsEnabled = true;
rootPage.NotifyUser("Claim barcode scanner failed.", NotifyType.ErrorMessage);
}
}
else
{
ScenarioStartScanButton.IsEnabled = true;
rootPage.NotifyUser("Barcode scanner not found. Please connect a barcode scanner.", NotifyType.ErrorMessage);
}
}
/// <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>
/// Event Handler for Start Scan Button Click.
/// Sets up the barcode scanner to be ready to receive the data events from the scan.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private async void ScenarioStartScanButton_Click(object sender, RoutedEventArgs e)
{
ScenarioStartScanButton.IsEnabled = false;
rootPage.NotifyUser("Acquiring barcode scanner object.", NotifyType.StatusMessage);
// create the barcode scanner.
scanner = await DeviceHelpers.GetFirstBarcodeScannerAsync();
if (scanner != null)
{
// claim the scanner for exclusive use and enable it so that data received events are received.
claimedScanner = await scanner.ClaimScannerAsync();
if (claimedScanner != null)
{
// It is always a good idea to have a release device requested event handler. If this event is not handled, there are chances of another app can
// claim ownership of the barcode scanner.
claimedScanner.ReleaseDeviceRequested += claimedScanner_ReleaseDeviceRequested;
// after successfully claiming, attach the datareceived event handler.
claimedScanner.DataReceived += claimedScanner_DataReceived;
// Ask the API to decode the data by default. By setting this, API will decode the raw data from the barcode scanner and
// send the ScanDataLabel and ScanDataType in the DataReceived event
claimedScanner.IsDecodeDataEnabled = true;
// enable the scanner.
// Note: If the scanner is not enabled (i.e. EnableAsync not called), attaching the event handler will not be any useful because the API will not fire the event
// if the claimedScanner has not been Enabled
await claimedScanner.EnableAsync();
// after successful claim, list supported symbologies
IReadOnlyList <uint> supportedSymbologies = await scanner.GetSupportedSymbologiesAsync();
foreach (uint symbology in supportedSymbologies)
{
listOfSymbologies.Add(new SymbologyListEntry(symbology));
}
// reset the button state
ScenarioEndScanButton.IsEnabled = true;
rootPage.NotifyUser("Ready to scan. Device ID: " + claimedScanner.DeviceId, NotifyType.StatusMessage);
}
else
{
scanner.Dispose();
scanner = null;
ScenarioStartScanButton.IsEnabled = true;
rootPage.NotifyUser("Claim barcode scanner failed.", NotifyType.ErrorMessage);
}
}
else
{
ScenarioStartScanButton.IsEnabled = true;
rootPage.NotifyUser("Barcode scanner not found. Please connect a barcode scanner.", NotifyType.ErrorMessage);
}
}
private void Form1_Closing(object sender, CancelEventArgs e)
{
if (xBCScanner != null)
{
xBCScanner.Dispose();
}
// сохранение рабочих данных (если есть)
if (bGoodAvtor == true)
{
//xNSI.SaveCS(xSm, xPars);
xSm.SaveCS(xPars.sDataPath, xNSI.DT[NSI.TBD_DOC].dt.Rows.Count);
xNSI.DSSave(xPars.sDataPath);
}
if (swProt != null)
{
swProt.Close();
}
}
