Signing with Text using GroupDocs.Signature for .NET

Introduction

In the digital age, signing documents electronically has become a standard practice, saving time and resources. GroupDocs.Signature for .NET offers a comprehensive solution for adding text signatures to various document formats programmatically. In this tutorial, we’ll walk you through the process of signing a document with text using GroupDocs.Signature for .NET.

Prerequisites

Before we dive into the tutorial, make sure you have the following prerequisites:

1. GroupDocs.Signature for .NET: Ensure you have the GroupDocs.Signature for .NET library installed. You can download it from here.
2. Development Environment: Have a working environment set up for .NET development.
3. Document: Prepare the document (e.g., PDF, Word) that you want to sign with text.

Import Namespaces

First, you need to import the necessary namespaces into your .NET project to use GroupDocs.Signature functionalities.

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

Let’s break down the process of signing a document with text into multiple steps:

Step 1: Load Document

Load the document you want to sign with text.

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

Step 2: Set Output File Path

Define 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

Set up the options for text signature, including text content, position, size, color, and font.

TextSignOptions options = new TextSignOptions("John Smith")
{
    Left = 50, // Set signature position
    Top = 200,
    Width = 100, // Set signature rectangle
    Height = 30,
    ForeColor = Color.Red, // Set text color
    Font = new SignatureFont { Size = 14, FamilyName = "Comic Sans MS" } // Set font
};

Step 4: Sign Document

Use GroupDocs.Signature to sign the document with the specified options and save the signed document to the output file path.

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

Conclusion

In this tutorial, we’ve learned how to sign a document with text using GroupDocs.Signature for .NET. By following these steps, you can efficiently add text signatures to your documents programmatically, enhancing security and authenticity.

FAQ’s

Can I customize the appearance of the text signature?

Yes, you can customize various parameters such as color, font, size, and position of the text signature according to your preferences.

Is GroupDocs.Signature compatible with multiple document formats?

Yes, GroupDocs.Signature supports various document formats including PDF, Word, Excel, PowerPoint, and more.

Can I add multiple text signatures to a single document?

Absolutely, you can add multiple text signatures to a document, each with its own set of customization options.

Does GroupDocs.Signature ensure document integrity after signing?

Yes, GroupDocs.Signature employs 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.