public BarcodeReadSymbologyStatus Status { get; set; }
A BarcodeReadSymbologyStatus enumeration member that specifies the status of the read operation. Default value is BarcodeReadSymbologyStatus.Continue.
The BarcodeReader always sets the value of this property BarcodeReadSymbologyStatus.Continue. You can change the value of this property to another value depending on your application logic. The following table lists the status values and their meaning:
Value | Description |
---|---|
BarcodeReadSymbologyStatus.Continue |
Continue reading the next barcode(s) (if any). This is the default behavior. |
BarcodeReadSymbologyStatus.Skip |
Skip reading the current barcode symbologies and move to the next (if any). Setting BarcodeReadSymbologyEventArgs.Status to Skip will have an affect only if the BarcodeEngine is about to read the barcodes. i.e., when the value of BarcodeReadSymbologyEventArgs.Operation is BarcodeReadSymbologyOperation.PreRead. When the operation is BarcodeReadSymbologyOperation.PostRead and the reader has finished reading the barcodes, then setting the status to Skip will have no effect. |
BarcodeReadSymbologyStatus.Abort |
Abort the read operation. The BarcodeReader will stop trying to read barcodes and the read operation will end. This can be used when the BarcodeReadSymbologyEventArgs.Operation is BarcodeReadSymbologyOperation.PreRead or BarcodeReadSymbologyOperation.PostRead. |
using Leadtools;
using Leadtools.Codecs;
using Leadtools.Barcode;
using Leadtools.ImageProcessing;
public void BarcodeReader_ReadSymbologyExample()
{
string imageFileName = Path.Combine(LEAD_VARS.ImagesDir, "Barcode1.tif");
// Create a Barcode engine
BarcodeEngine engine = new BarcodeEngine();
// Get the Barcode reader instance
BarcodeReader reader = engine.Reader;
// Load the image
using (RasterCodecs codecs = new RasterCodecs())
{
using (RasterImage image = codecs.Load(imageFileName, 0, CodecsLoadByteOrder.BgrOrGray, 1, 1))
{
// Subscribe to the ReadSymbology event
reader.ReadSymbology += new EventHandler<BarcodeReadSymbologyEventArgs>(reader_ReadSymbology);
// Read all barcodes in the image
reader.ReadBarcodes(image, LeadRect.Empty, 0, null);
reader.ReadSymbology -= new EventHandler<BarcodeReadSymbologyEventArgs>(reader_ReadSymbology);
}
}
}
private void reader_ReadSymbology(object sender, BarcodeReadSymbologyEventArgs e)
{
if (e.Operation == BarcodeReadSymbologyOperation.PreRead)
{
// Before reading, show the symbologies the engine is going to try to read
Console.WriteLine("Trying to read the following symbologies:");
BarcodeSymbology[] symbologies = e.GetSymbologies();
for (int i = 0; i < symbologies.Length; i++)
{
Console.Write(symbologies[i]);
if (i != (symbologies.Length - 1))
{
Console.Write(", ");
Console.WriteLine(e.Options.FriendlyName);
}
else
{
Console.WriteLine();
}
}
}
else if (e.Operation == BarcodeReadSymbologyOperation.PostRead)
{
if (e.Error == null)
{
// No errors
BarcodeData barcode = e.Data;
if (barcode != null)
{
// Found a barcode, show it
Console.WriteLine(" {0} at {1} with data {2}", barcode.Symbology, barcode.Bounds, barcode.Value);
}
else
{
Console.WriteLine(" No barcodes found");
}
}
else
{
// Show the error
Console.WriteLine("Error: {0}", e.Error.Message);
// Tell the reader top stop reading barcodes
e.Status = BarcodeReadSymbologyStatus.Abort;
}
}
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images";
}