Add Text Signatures to Documents Using GroupDocs.Signature

Introduction

In today’s digital landscape, electronic document signing has become essential for streamlining workflows and saving resources. GroupDocs.Signature for .NET provides a powerful solution for programmatically adding text signatures to various document formats. This tutorial will guide you through the steps to sign a document with text using GroupDocs.Signature for .NET.

Prerequisites

Before we begin, ensure you have the following:

1. GroupDocs.Signature for .NET: Download and install the library from here.
2. Development Environment: Set up your .NET development environment.
3. Document: Prepare the document you want to sign (e.g., PDF, Word).

Importing Necessary Namespaces

Start by importing the required namespaces into your .NET project:

using System;
using System.IO;
using System.Drawing;
using GroupDocs.Signature;
using GroupDocs.Signature.Domain;
using GroupDocs.Signature.Options;

Step 1: Load the Document

Begin by loading the document you intend to sign:

string filePath = "sample.pdf"; // Path to your document
string fileName = Path.GetFileName(filePath);

Step 2: Define the Output File Path

Next, set the output file path where the signed document will be saved:

string outputFilePath = Path.Combine("Your Document Directory", "SignWithText", fileName);

Step 3: Create Signature Options

Configure the options for your text signature, including the content, position, size, color, and font style:

TextSignOptions options = new TextSignOptions("John Smith")
{
    Left = 50, // X position
    Top = 200, // Y position
    Width = 100, // Width of the signature
    Height = 30, // Height of the signature
    ForeColor = Color.Red, // Text color
    Font = new SignatureFont { Size = 14, FamilyName = "Comic Sans MS" } // Font settings
};

Step 4: Sign the Document

Finally, use GroupDocs.Signature to apply the text signature and save the signed document:

using (Signature signature = new Signature(filePath))
{
    SignResult result = signature.Sign(outputFilePath, options); // Sign the document
    Console.WriteLine($"\nDocument signed successfully with {result.Succeeded.Count} signature(s).\nFile saved at {outputFilePath}.");
}

Conclusion

In this tutorial, we demonstrated how to programmatically add a text signature to a document using GroupDocs.Signature for .NET. By following these steps, you can enhance the security and authenticity of your documents efficiently.

FAQ’s

Can I customize the appearance of the text signature?

Yes, you can customize various attributes such as color, font, size, and position of the text signature to suit your needs.

Is GroupDocs.Signature compatible with multiple document formats?

Absolutely! GroupDocs.Signature supports a wide range of formats, including PDF, Word, Excel, PowerPoint, and more.

Can I add multiple text signatures to a single document?

Yes, you can add multiple text signatures, each with its own customization options.

Does GroupDocs.Signature ensure document integrity after signing?

Yes, the library uses robust cryptographic algorithms to ensure document integrity and prevent tampering after signing.

Is there a trial version available for testing before purchasing?

Yes, you can download a free trial version from here to explore the features before making a purchase.