Verify Text signatures in the document

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. 

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

using (Signature signature = new Signature("sample.pdf"))
{
        TextVerifyOptions options = new TextVerifyOptions()
        {
            AllPages = true, // this value is set by default
            SignatureImplementation = TextSignatureImplementation.Stamp,
            Text = "John",
            MatchType = TextMatchType.Contains
        };
        // 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

Advanced Usage Topics

To learn more about document eSign features, please refer to the advanced usage section.

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.