Verifying QR Code signatures in advance

GroupDocs.Signatureย provides different properties inย QrCodeVerifyOptionsย classย to specify verification of QR Code signatures.

Here are the steps to verifyย QR Code signature within the document with GroupDocs.Signature:

This example shows how to verify QR Code signature in the document.ย Seeย VerificationResult

using (Signature signature = new Signature("sample.pdf"))
{
    QrCodeVerifyOptions options = new QrCodeVerifyOptions()
    {
        // specify if all pages shoudl be verified
        AllPages = false,
        PagesSetup = new PagesSetup() {  FirstPage = false, LastPage = true, OddPages = false, EvenPages = true },
        // specify text pattern
        Text = "John",
        // specify verification text pattern
        MatchType = TextMatchType.Contains,
        // specify types of QR code to verify
        EncodeType = QrCodeTypes.QR
    };
    // verify document signatures
    VerificationResult result = signature.Verify(options);
    if (result.IsValid)
    {
        Console.WriteLine("\nDocument was verified successfully!");
    }
    else
    {
        Console.WriteLine("\nDocument failed verification process.");
    }
}

More resources

GitHub Examples

You may easily run the code above and see the feature in action in ourย GitHub examples:

Free Online Apps

Along with the full-featured .NET library, we provide simple but powerful free online apps.

To sign PDF, Word, Excel, PowerPoint, and other documents you can use the online apps from the GroupDocs.Signature App Product Family.