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

Easily apply signatures on even, odd, or specific pages of a document using .NET, giving you complete control over where signatures appear.

Configure Page Padding

Customize padding options to precisely align signatures on document pages, ensuring professional appearance.

Customize Signature Appearance

Fully control the visual style of text and image signatures by setting custom fonts, colors, and other appearance options, all from your .NET app.

Apply Background Crop Settings

Enhance signature visibility with crop settings for signature backgrounds, ideal for creating clean, professional documents.

Repeat Signature String

Repeat signature strings to fill specified areas.

Digital Signatures with CryptoApi & XmlDsig

Supports digital signatures using CryptoApi and XmlDsig.

Align Text for Barcode Signatures

Align barcode signatures with configurable text string.

Signature Formatting with Brushes

Use various brushes for formatting signature appearance.

Sign Password-Protected Documents

Sign documents that are protected with a password.

Verify Document Signatures

Verify the authenticity and validity of the signature.

Get or Set Signature Time

Set or retrieve the timestamp of a digital signature.

Search for Signature Types

Search for specific signature types in documents.

Advanced Features

Customize Signature Appearance

Fully customize (Font, Color, etc.) the appearance of signatures.

Manage Multiple Signatures

Manage multiple signatures within a single document.

Password Protection for Documents

Apply password protection to sensitive signed documents.

Verify Signature Authenticity

Verify the authenticity of signatures applied to documents.

Search for Specific Signatures

Search for specific types of signatures within a document.

Digital Signature Support

Full support for various digital signature standards.

Barcode and QR-Code Signatures

Supported Formats for Barcode/QR Signatures

Works with DOC, DOCX, XLSX, PDF, and image formats.

Customize Barcode/QR-Code Signatures

Customize appearance and content of barcode/QR-code signatures.

Barcode/QR-Code Usage Scenarios

Various usage scenarios, including document tracking and identification.

Stamp Signatures

Overview of Stamp Signatures

Visual and textual stamp signatures for official document use.

Customize Stamp Signatures

Customize stamp size, text, and appearance.

Password-Protected Document Signing

Sign Password-Protected Documents

Sign documents that are locked with a password.

Manage Password Protection and Signatures

Manage and apply password protection to 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 options for font, color, and alignment across single or multiple document pages.

Image Signature

Apply image signatures with advanced appearance settings like opacity, grayscale, brightness, and contrast filters.

Barcode Signature

Add various barcode types to documents, offering flexible settings for appearance, alignment, and encoding options.

QR-Code Signature

Insert QR-Code signatures with customizable settings, including encoding types, appearance, and alignment features.

Digital Signature

Apply digital certificates (PFX, CRT) to documents or specific pages (PDF-only) with robust customization options for appearance and alignment.

Stamp Signature

Place generated stamp images on document pages with flexible customization options.

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);