ChecksumValidation

ChecksumValidation enumeration

在识别一维和邮政条码期间启用校验和验证。

对于必须包含校验和的符号，默认被视为是，在仅可能校验和的情况下被视为否。

从未使用过校验和：Codabar、PatchCode、Pharmacode、DataLogic2of5

可以使用校验和：Code39 Standard/Extended、Standard2of5、Interleaved2of5、ItalianPost25、Matrix2of5、MSI、ItalianPost25、DeutschePostIdentcode、DeutschePostLeitcode、VIN

始终使用校验和：其余符号

public enum ChecksumValidation

价值观

姓名价值描述
Default0如果规范要求校验和 - 它将被验证。
On1如果可能，请始终验证校验和。
Off2不验证校验和。

例子

此示例显示了 ChecksumValidation 对识别质量和结果的影响

[C#]
using (BarcodeGenerator generator = new BarcodeGenerator(EncodeTypes.EAN13, "1234567890128"))
{
    generator.Save(@"c:\test.png");
}
using (BarCodeReader reader = new BarCodeReader(@"c:\test.png", DecodeType.EAN13))
{
    //校验和禁用
    reader.BarcodeSettings.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))
{
    //校验和启用
    reader.BarcodeSettings.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)
    '校验和禁用
    reader.BarcodeSettings.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)
    '启用校验和
    reader.BarcodeSettings.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

也可以看看

BaseExtendedParameters Code128DataPortion