ChecksumValidation Enumeration

Enable checksum validation during recognition for 1D barcodes.

Default is treated as Yes for symbologies which must contain checksum, as No where checksum only possible.

Checksum never used: Codabar

Checksum is possible: Code39 Standard/Extended, Standard2of5, Interleaved2of5, Matrix2of5, ItalianPost25, DeutschePostIdentcode, DeutschePostLeitcode, VIN

Checksum always used: Rest symbologies

Namespace:  Aspose.BarCode.BarCodeRecognition
Assembly:  Aspose.BarCode (in Aspose.BarCode.dll) Version: 20.11.0
Syntax
public enum ChecksumValidation
Members
  Member nameValueDescription
Default0 If checksum is required by the specification - it will be validated.
On1 Always validate checksum if possible.
Off2 Do not validate checksum.
Examples
This sample shows influence of ChecksumValidation on recognition quality and results 
[C#]
using (BarcodeGenerator generator = new BarcodeGenerator(EncodeTypes.EAN13, "1234567890128"))
{
    generator.Save(@"c:\test.png");
}
using (BarCodeReader reader = new BarCodeReader(@"c:\test.png", DecodeType.EAN13))
{
    //checksum disabled
    reader.ChecksumValidation = ChecksumValidation.Off;
    foreach (BarCodeResult result in reader.ReadBarCodes())
    {
        Console.WriteLine("BarCode CodeText: " + result.CodeText);
        Console.WriteLine("BarCode Value: " + result.Extended.OneD.Value);
        Console.WriteLine("BarCode Checksum: " + result.Extended.OneD.CheckSum);
    }
}
using (BarCodeReader reader = new BarCodeReader(@"c:\test.png", DecodeType.EAN13))
{
    //checksum enabled
    reader.ChecksumValidation = ChecksumValidation.On;
    foreach (BarCodeResult result in reader.ReadBarCodes())
    {
        Console.WriteLine("BarCode CodeText: " + result.CodeText);
        Console.WriteLine("BarCode Value: " + result.Extended.OneD.Value);
        Console.WriteLine("BarCode Checksum: " + result.Extended.OneD.CheckSum);
    }
}
[VB.NET]
Using generator As New BarcodeGenerator(EncodeTypes.EAN13, "1234567890128")
    generator.Save("c:\test.png")
End Using
Using reader As New BarCodeReader("c:\test.png", DecodeType.EAN13)
    'checksum disabled
    reader.ChecksumValidation = ChecksumValidation.Off
    For Each result As BarCodeResult In reader.ReadBarCodes()
        Console.WriteLine("BarCode CodeText: " + result.CodeText)
        Console.WriteLine("BarCode Value: " + result.Extended.OneD.Value)
        Console.WriteLine("BarCode Checksum: " + result.Extended.OneD.CheckSum)
    Next
End Using
Using reader As New BarCodeReader("c:\test.png", DecodeType.EAN13)
    'checksum enabled
    reader.ChecksumValidation = ChecksumValidation.On
    For Each result As BarCodeResult In reader.ReadBarCodes()
        Console.WriteLine("BarCode CodeText: " + result.CodeText)
        Console.WriteLine("BarCode Value: " + result.Extended.OneD.Value)
        Console.WriteLine("BarCode Checksum: " + result.Extended.OneD.CheckSum)
    Next
End Using
See Also