Delete Signature by ID

Introduction

In this tutorial, we’ll explore how to delete a signature by its ID using GroupDocs.Signature for .NET. GroupDocs.Signature for .NET is a powerful library that allows developers to add, remove, or verify digital signatures in various document formats using .NET applications.

Prerequisites

Before we begin, make sure you have the following prerequisites:

1. GroupDocs.Signature for .NET Library: Download and install the library from here.
2. .NET Framework: Ensure you have .NET Framework installed on your system.
3. Document with Signature: Prepare a document (e.g., DOCX, PDF) with a signature that you want to delete.

Import Namespaces

using System;
using System.IO;
using System.Collections.Generic;
using GroupDocs.Signature;
using GroupDocs.Signature.Domain;
using GroupDocs.Signature.Options;

Step 1: Define File Paths

First, specify the file path for the document containing the signature, and the output file path where the modified document will be saved.

string filePath = "sample_multiple_signatures.docx";
string fileName = Path.GetFileName(filePath);
string outputFilePath = Path.Combine("Your Document Directory", "DeleteById", fileName);

Step 2: Copy the Document

Since the Delete method modifies the document in place, it’s best to create a copy of the original document.

File.Copy(filePath, outputFilePath, true);

Step 3: Delete Signature by ID

Initialize the Signature object with the document file path and use the Delete method to remove the signature by its ID.

using (Signature signature = new Signature(outputFilePath))
{
    string id = @"eff64a14-dad9-47b0-88e5-2ee4e3604e71";
    bool result = signature.Delete(id);
    if (result)
    {
        Console.WriteLine($"Signature with Id# '{id}' was deleted from document ['{fileName}'].");
    }
    else
    {
        Helper.WriteError($"Signature was not deleted from the document! Signature with id# '{id}' was not found!");
    }
}

Conclusion

In this tutorial, we’ve learned how to delete a signature by its ID using GroupDocs.Signature for .NET. This library provides a convenient way to manage digital signatures in various document formats programmatically.

FAQ’s

Can I delete multiple signatures at once?

Yes, you can delete multiple signatures by iterating through their IDs and calling the Delete method for each ID.

Is GroupDocs.Signature for .NET compatible with all document formats?

GroupDocs.Signature for .NET supports a wide range of document formats, including PDF, DOCX, XLSX, and more.

Can I customize the appearance of the signature?

Yes, you can customize the appearance of the signature, including its position, size, font, and color.

Is there a trial version available?

Yes, you can download a free trial version from here.

Where can I find help or support for GroupDocs.Signature for .NET?

You can visit the support forum here for assistance.