Installation

The package is available at nuget.org and it can be installed via package manager console by executing following command:

PM> NuGet\Install-Package GroupDocs.signature-Cloud

.NET Cloud REST API for eSigning Documents

GroupDocs.Signature Cloud SDK for .NET provides a comprehensive solution for integrating e-signatures into your applications. It supports a wide range of signature types (text, image, barcode, QR-code, digital, and stamp) and file formats (including DOCX, PDF, XLSX, and images), allowing for granular control over signature appearance, placement, and security. Developers can tailor the signing process to their specific needs, utilizing digital signatures and password protection to ensure document integrity and confidentiality. Easily integrate this API into C#, ASP.NET, and other .NET cloud applications and get started quickly with the SDK and clear API documentation.

Cloud Document Signing Features

Apply Signatures to Specific Pages - Apply signatures on even, odd, or specific pages for precise placement.
Configure Page Padding - Set page padding to align signatures precisely on each page.
Customize Signature Appearance - Control fonts, colors, and style of signatures via .NET.
Apply Background Crop Settings - Use background crop settings to improve signature visibility.
Repeat Signature String - Repeat signature strings to fill defined areas.
Digital Signatures with CryptoApi & XmlDsig - Support digital signatures via CryptoApi and XmlDsig.
Align Text for Barcode Signatures - Align barcode signatures using configurable text.
Signature Formatting with Brushes - Apply brush styles to format signature appearance.
Sign Password-Protected Documents - Sign password-protected documents.
Verify Document Signatures - Verify authenticity and validity of document signatures.
Get or Set Signature Time - Set or retrieve timestamp of a digital signature.
Search for Signature Types - Search for specific signature types within documents.

Advanced Features

Customize Signature Appearance - Customize signature fonts, colors, and style.
Manage Multiple Signatures - Handle multiple signatures in one document.
Password Protection for Documents - Add password protection to signed documents.
Verify Signature Authenticity - Validate authenticity of applied signatures.
Search for Specific Signatures - Search for specific signatures in a document.
Digital Signature Support - Support multiple digital signature standards.

Barcode and QR-Code Signatures

Supported Formats for Barcode/QR Signatures - Supports DOC, DOCX, XLSX, PDF, and image formats.
Customize Barcode/QR-Code Signatures - Customize appearance and content of barcode/QR signatures.
Barcode/QR-Code Usage Scenarios - Use cases include document tracking and identification.

Stamp Signatures

Overview of Stamp Signatures - Visual and text stamp signatures for official documents.
Customize Stamp Signatures - Adjust stamp size, text, and appearance.

Password-Protected Document Signing

Sign Password-Protected Documents - Sign documents locked with a password.
Manage Password Protection and Signatures - Manage password protection for signed documents.

Supported Image Formats

Supported PDF Formats

Supported Presentation Formats

Supported Spreadsheet Formats

Supported Word Processing Formats

Supported Signature Types

Text Signature - Add customizable text labels with font, color, and alignment.
Image Signature - Apply image signatures with opacity, grayscale, brightness, contrast.
Barcode Signature - Add barcode types with flexible appearance, alignment, and encoding.
QR-Code Signature - Insert QR-Code signatures with customizable encoding, appearance, alignment.
Digital Signature - Apply digital certificates (PFX, CRT) to docs or PDF pages, customizable.
Stamp Signature - Place stamp images on pages with flexible customization.

Quick Start

1. Create an Account

Sign up for a free account at GroupDocs Cloud Dashboard.

2. Create an API Client App

Get your Client ID and Client Secret by creating a new application. These credentials will allow you to make requests to the GroupDocs Cloud API.

3. Install the SDK

You don’t need to install anything initially to start using GroupDocs.Signature Cloud SDK for .NET.

• To add the SDK to your project, run the following command in the Visual Studio Package Manager Console:

  Install-Package GroupDocs.Signature-Cloud
  

• If you’re upgrading the SDK, run:

  Update-Package GroupDocs.Signature-Cloud
  

4. Make an API Request

Use your Client ID and Client Secret to make API requests. Here’s an example of getting supported file formats using the SDK:

// Example: Get supported file formats using GroupDocs.Signature Cloud SDK
string MyClientSecret = "";  // Get from https://dashboard.groupdocs.cloud
string MyClientId = "";      // Get from https://dashboard.groupdocs.cloud

var configuration = new Configuration(MyClientId, MyClientSecret);
var apiInstance = new InfoApi(configuration);
var response = apiInstance.GetSupportedFileFormats();

Sign DOCX Document with Image Signature using C# Code

// For complete examples and data files, please go to https://github.com/groupdocs-signature-cloud/groupdocs-signature-cloud-dotnet-samples
// Get ClientId and ClientSecret from https://dashboard.groupdocs.cloud
string MyClientSecret = "";
string MyClientId = "";

var configuration = new Configuration(MyClientId, MyClientSecret);
var apiInstance = new SignApi(configuration);

// Sign options
var options = new SignImageOptions {
    SignatureType = SignatureTypeEnum.Image,
        ImageFilePath = "signature.jpg",
        Left = 100,
        Top = 100,
        Width = 200,
        Height = 100,
        LocationMeasureType = SignImageOptions.LocationMeasureTypeEnum.Pixels,
        SizeMeasureType = SignImageOptions.SizeMeasureTypeEnum.Pixels,
        RotationAngle = 0,
        HorizontalAlignment = SignImageOptions.HorizontalAlignmentEnum.None,
        VerticalAlignment = SignImageOptions.VerticalAlignmentEnum.None,
        Margin = new Padding {
            All = 5
        },
        MarginMeasureType = SignImageOptions.MarginMeasureTypeEnum.Pixels,
        Page = 1,
        AllPages = true,
        PagesSetup = new PagesSetup {
            EvenPages = false,
                FirstPage = true,
                LastPage = false,
                OddPages = false,
                PageNumbers = new List < int ? > {
                    1
                }
        }
};
// Sign settings.
var signSettings = new SignSettings {
    FileInfo = new FileInfo {
            FilePath = "one-page.docx"
        },
        SaveOptions = new SaveOptions {
            OutputFilePath = "signedImage_one-page.docx", SaveFormat = "docx"
        },
        Options = new List < SignOptions > {
            options
        }
};
// Create request.
var request = new CreateSignaturesRequest(signSettings);
// Call api method with request.
var response = apiInstance.CreateSignatures(request);