Learn about GroupDocs.Signature for .NET API features

GroupDocs.Signature for .NET API functionality contains vast selection of means to process in demand documents formats by using electronic signatures. Wide spectrum of e-signatures like texts, images, digital certificates, barcodes, QR-codes, stamps or metadata are supported. Customers can add, remove, edit, validate or search digital signatures at PDFs, MS Word documents, MS Excel workbooks, MS PowerPoint presentations, Adobe Photoshop files and various image formats. Numerous useful features and settings are available.

How to change Text signatures in your Pdf document

GroupDocs.Signature for .NET includes useful features like updation of Text signatures placed at Pdf documents. It makes possible to change signatures features without extra code.

To start with, create Signature object passing as a constructor parameter path to a document which is supposed to be updated.
Then, instantiate an appropriate particular signature object and set up its identifier and properties which need to be changed.
Lastly, call Signature’s Update method passing particular signature object.
Process updating results to your notice.

System Requirements

GroupDocs.Signature for .NET are supported on all major platforms and operating systems. Before executing the code below, please make sure that you have the following prerequisites installed on your system.

Operating systems: Microsoft Windows, Linux, MacOS
Development environments: Microsoft Visual Studio, Xamarin, MonoDevelop
Frameworks: .NET Framework, .NET Standard, .NET Core, Mono
Download the latest version of GroupDocs.Signature for .NET from Nuget

        
// Set up input Pdf file
string filePath = "input.pdf";

// Instantiate Signature for input file
using (GroupDocs.Signature.Signature signature = new GroupDocs.Signature.Signature(filePath))
{
        // Id of signature which is supposed to be updated
        // such Id might be got as a result of search operation
        string id = "ff988ab1-7403-4c8d-8db7-f2a56b9f8530";

        // provide signature features to update
        // set up particular signature id
        TextSignature signatureToUpdate = new TextSignature(id)
        {
            // specify signature width
            Width = 130,
            // specify signature height
            Height = 20,
            // set left position
            Left = 40,
            // set top position
            Top = 50,
            // set up new text
            Text = "Mr. John Smith"
        };

        // update signature
        bool updateResult = signature.Update(signatureToUpdate);

        // process updation result
        if (updateResult)
        {
            Console.WriteLine("Signature was updated successfully!");
        }
}