Advanced search for Text signatures

GroupDocs.SignatureΒ providesΒ TextSearchOptionsΒ classΒ to specify different options to search for Text Signatures.

Here are the steps to search for text signatures within the document with GroupDocs.Signature:

  • Create new instance ofΒ SignatureΒ class and pass source document path as a constructor parameter.
  • Instantiate theΒ TextSearchOptionsΒ object according to your requirements and specify search options.
  • CallΒ SearchΒ method ofΒ SignatureΒ class instance and passΒ TextSearchOptionsΒ to it.

This example shows how to make advanced search for Text signature in the document.

using (Signature signature = new Signature(sample.pdf))
{
    // setup search options
    TextSearchOptions searchOptions = new TextSearchOptions()
    {
        // specify special pages to search on
        AllPages = false,
        // single page number
        PageNumber = 1,
        // setup extended search in pages setup
        PagesSetup = new PagesSetup() { FirstPage = true, LastPage = true, OddPages = false, EvenPages = false },
        // specify text match type
        MatchType = TextMatchType.Exact,
        // specify text pattern to search
        Text = "John Smith"
    };

   Β // search document
    List<TextSignature> signatures = signature.Search<TextSignature>(searchOptions);

    // output signatures
    foreach (TextSignature textSignature in signatures)
    {
        if (textSignature != null)
        {
            Console.Write($"Found Text signature: {textSignature.SignatureImplementation} with text {textSignature.Text}.");
            Console.WriteLine($"Location at {textSignature.Left}-{textSignature.Top}. Size is {textSignature.Width}x{textSignature.Height}.");
        }
    }
}

More resources

GitHub Examples

You may easily run the code above and see the feature in action in ourΒ 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.