Verify Text signatures

GroupDocs.Signature provides TextVerifyOptions class to specify different options for verification of Text signatures.

Here are the steps to verify Text signature within the document with GroupDocs.Signature:

Create new instance of Signature class and pass source document path as a constructor parameter.
Instantiate the TextVerifyOptions object according to your requirements and specify verification options
Call Verify method of Signature class instance and pass TextVerifyOptions to it.
Analyze VerificationResult result if needed.

This example shows how to verify Text signature in the document. See VerificationResult

using (Signature signature = new Signature("signedSample.pdf"))
{
    TextVerifyOptions options = new TextVerifyOptions()
    {
        // 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
        SignatureImplementation = TextSignatureImplementation.Stamp,
        // specify if form fielsd should be verified
        FormTextFieldTitle = "Sample",
        FormTextFieldType = FormTextFieldType.RichText
    };
    // 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 our GitHub examples:

Free Online App

Along with full-featured .NET library we provide simple, but powerful free Apps.
You are welcome to eSign PDF, Word, Excel, PowerPoint documents with free to use online GroupDocs Signature App.

Verify QR-code signatures Updating