// Gets selected barcode type
private BarcodeTypeSelector GetBarcodeTypeFromCombobox()
{
BarcodeTypeSelector result = new BarcodeTypeSelector();
string selectedBarcodeTypeName = (string)cmbBarcodeType.SelectedItem;
PropertyInfo propertyInfo = typeof(BarcodeTypeSelector).GetProperty(selectedBarcodeTypeName);
propertyInfo.SetValue(result, true, null);
return(result);
}
/// <summary>
/// Get symbology filter for the SDK from the combobox selection text
/// </summary>
/// <param name="barType"></param>
/// <returns></returns>
private static BarcodeTypeSelector GetBarcodeTypeToFindFromCombobox(string barType)
{
string selectedItemText = barType.Trim().ToUpper();
BarcodeTypeSelector barcodeTypeToScan = new BarcodeTypeSelector();
if (selectedItemText.IndexOf("ALL BARCODES") > -1)
barcodeTypeToScan.SetAll();
else if (selectedItemText.IndexOf("ALL LINEAR BARCODES") > -1)
barcodeTypeToScan.SetAll1D();
else if (selectedItemText.IndexOf("ALL 2D BARCODES") > -1)
barcodeTypeToScan.SetAll2D();
else if (selectedItemText.IndexOf("AZTEC") > -1)
barcodeTypeToScan.Aztec = true;
else if (selectedItemText.IndexOf("CODABAR") > -1)
barcodeTypeToScan.Codabar = true;
else if (selectedItemText.IndexOf("CODE 39") > -1)
barcodeTypeToScan.Code39 = true;
else if (selectedItemText.IndexOf("CODE 128") > -1)
barcodeTypeToScan.Code128 = true;
else if (selectedItemText.IndexOf("DATAMATRIX") > -1)
barcodeTypeToScan.DataMatrix = true;
else if (selectedItemText.IndexOf("EAN 13") > -1)
barcodeTypeToScan.EAN13 = true;
else if (selectedItemText.IndexOf("GS1-128") > -1)
barcodeTypeToScan.GS1 = true;
else if (selectedItemText.IndexOf("GS1DATABAREXPANDED") > -1)
barcodeTypeToScan.GS1DataBarExpanded = true;
else if (selectedItemText.IndexOf("GS1DATABAREXPANDEDSTACKED") > -1)
barcodeTypeToScan.GS1DataBarExpandedStacked = true;
else if (selectedItemText.IndexOf("GS1DATABARLIMITED") > -1)
barcodeTypeToScan.GS1DataBarLimited = true;
else if (selectedItemText.IndexOf("GS1DATABAROMNIDIRECTIONAL") > -1)
barcodeTypeToScan.GS1DataBarOmnidirectional = true;
else if (selectedItemText.IndexOf("GS1DATABARSTACKED") > -1)
barcodeTypeToScan.GS1DataBarStacked = true;
else if (selectedItemText.IndexOf("I2OF5") > -1)
barcodeTypeToScan.Interleaved2of5 = true;
else if (selectedItemText.IndexOf("PATCH") > -1)
barcodeTypeToScan.PatchCode = true;
else if (selectedItemText.IndexOf("PDF 417") > -1)
barcodeTypeToScan.PDF417 = true;
else if (selectedItemText.IndexOf("QR CODE") > -1)
barcodeTypeToScan.QRCode = true;
else if (selectedItemText.IndexOf("UPCA") > -1)
barcodeTypeToScan.UPCA = true;
else if (selectedItemText.IndexOf("UPCE") > -1)
barcodeTypeToScan.UPCE = true;
else if (selectedItemText.IndexOf("MAXICODE") > -1)
barcodeTypeToScan.MaxiCode = true;
return barcodeTypeToScan;
}
// Background thread procedure used by BackgroundWorker
public void BackgroundWorker_DoWork(object sender, DoWorkEventArgs e)
{
BackgroundWorker worker = (BackgroundWorker)sender;
BarcodeTypeSelector barcodeTypesToFind = (BarcodeTypeSelector)e.Argument;
// Create and setup barcode reader instance
using (Reader reader = new Reader())
{
reader.RegistrationName = "demo";
reader.RegistrationKey = "demo";
reader.BarcodeTypesToFind = barcodeTypesToFind;
// Work while not canceled
while (true)
{
// Check cancellation
if (worker.CancellationPending)
{
e.Cancel = true;
_synchronizationEvent.Set();
return;
}
// Get image from camera by invoking method from UI thread
Bitmap bitmap = (Bitmap)Invoke(new GetCameraImageDelegate(GetCameraImage));
if (bitmap == null)
{
e.Result = null;
return;
}
/* -----------------------------------------------------------------------
* NOTE: We can read barcodes from specific page to increase performance.
* For sample please refer to "Decoding barcodes from PDF by pages" program.
* ----------------------------------------------------------------------- */
// Search the image for barcodes
FoundBarcode[] result = reader.ReadFrom(bitmap);
// Update UI asynchronously
BeginInvoke(new Action <FoundBarcode[]>(UpdateStatus), new object[] { result });
// Pause
Thread.Sleep(SCAN_DELAY);
}
}
}
public void StartDecoding()
{
if (cmbCamera.SelectedIndex == -1)
{
return;
}
// Clear the output text box
rtbFoundBarcodes.Clear();
// Check if we have camera selected
if (cmbCamera.SelectedIndex != -1)
{
// Start the decoding in the background thread
BarcodeTypeSelector barcodeTypesToFind = GetBarcodeTypeFromCombobox();
_backgroundWorker.RunWorkerAsync(barcodeTypesToFind);
UpdateControls(true);
}
else
{
MessageBox.Show("Please select the camera first!");
}
}
