GroupDocs.Signature 22.4.0

Apply Signature to SVG Image Document via .NET API

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This on-premise .NET API lets your app end-users sign the electronic documents from a wide range of file formats. Supports several types of e-signing methods.

Document Signature Processing Features

• Create and add signatures to documents of various file formats.
• Specify visual attributes of signatures, such as color, font, margins, etc.
• Search and fetch a list of signatures from a document.
• Determine if the document contains signatures meeting specified criteria.
• Extract basic information about the document.
• Generate image representation of document pages for preview.
• Distinguish created signatures from the actual document.
• Put encrypted text into the QR-code signature or embed custom data objects.

What's new in v22.4.0

Support SVG for all Signature Types

This API release introduces support to apply signature to Scalable Vector Graphics (SVG) file type image documents. Some of the supported signature types are; barcode, image, metadata, QR-code, stamp, and text.

Setup Signature Ordering for Various Formats

A new feature has been implemented that allows you to setup the order position for page-oriented signature for Word® documents, Excel® spreadsheets, and image document formats.

The following C# code sample sets up the barcode signature order (top & bottom) on a document page using API:

public static void Run()
{
    using (Signature signature = new Signature("sample.png"))
    {
        // create several signatures that intersect
        // # 1 create barcode option with predefined barcode text
        // this options will be on top
        BarcodeSignOptions options1 = new BarcodeSignOptions("12345678")
        {
            // setup Barcode encoding type
            EncodeType = BarcodeTypes.Code128,
            // set signature position
            Left = 100,
            Top = 100,
            Width = 100,
            Height = 100,
            ZOrder = 2,
        };
        // # 2 create barcode option with predefined barcode text
        // this options will be bottom
        QrCodeSignOptions options2 = new QrCodeSignOptions("12345678")
        {
            // setup Barcode encoding type
            EncodeType = QrCodeTypes.QR,
            // set signature position
            Left = 150,
            Top = 150,
            ZOrder = 1
        };
        // sign document to file
        List<SignOptions> options = new List<SignOptions>() { options1, options2 };
        SignResult signResult = signature.Sign(outputFilePath, options);
        Console.WriteLine($"\nSource document signed successfully with {signResult.Succeeded.Count} signature(s).\nFile saved at {outputFilePath}.");
    }
}

Improved File Type Detection

The algorithm to detect the file type extensions has been considerably improved and now performs the file type detection more accurately.

For a complete list of features, enhancements, and bug fixes in this release please visit, GroupDocs.Signature for .NET 22.4 Release Notes.

Signature Supported Formats

The following section lists the supported file formats for the barcode, image, QR-code, stamp, and text signature types:
Microsoft Word: DOC, DOCM, DOCX, DOT, DOTM, DOTX
Microsoft Excel: XLSX, XLS, XLSB, XLSM, XLTX, XLTM
Microsoft PowerPoint: PPTX, PPTM, PPT, PPSX, PPSM, PPS, POTX, POTM
OpenOffice: ODT, OTT, ODS, OTS, ODP, OTP
Image: BMP, DJVU, GIF, JPG, JPEG, PNG, SVG, TIF, TIFF, WEBP
CorelDraw: CDR, CMX
Photoshop: PSD
Metafile: WMF
Portable: PDF

Digital Signature Supported Formats

Microsoft Word: DOC, DOCM, DOCX, DOT, DOTM, DOTX
Microsoft Excel: XLSX, XLS, XLSB, XLSM, XLTX, XLTM
OpenOffice: ODS, OTS
Portable: PDF

FormField Signature Supported Formats

Microsoft Word: DOC, DOCM, DOCX, DOT, DOTM, DOTX
Microsoft Excel: XLSX, XLS, XLSB, XLSM, XLTX, XLTM
OpenOffice: ODS, OTS, ODP
Portable: PDF

Metadata Signature Supported Formats

Microsoft Word: DOC, DOCM, DOCX, DOT, DOTM, DOTX
Microsoft Excel: XLSX, XLS, XLSB, XLSM, XLTX, XLTM
Microsoft PowerPoint: PPTX, PPTM, PPT, PPSX, PPSM, PPS, POTX, POTM
OpenOffice: ODT, OTT, ODS, OTS, ODP, OTP
Image: JPG, JPEG, PNG, SVG, TIF, TIFF
Photoshop: PSD
Portable: PDF

Supported Signature Types

• Text stamps
• Text labels
• Text as an image signature
• Image signature
• Digital signature
• Barcode signature
• QR-code signature
• Metadata signature
• Form-field signature

Platform Independence

GroupDocs.Signature for .NET does not require any external software or third-party tool to be installed. GroupDocs.Signature for .NET supports any 32-bit or 64-bit operating system where .NET or Mono framework is installed. The other details are as follows:

Microsoft Windows: Microsoft Windows Desktop (x86, x64) (XP & up), Microsoft Windows Server (x86, x64) (2000 & up), Windows Azure
Mac OS: Mac OS X
Linux: Linux (Ubuntu, OpenSUSE, CentOS and others)
Development Environments: Microsoft Visual Studio (2010 & up), Xamarin.Android, Xamarin.IOS, Xamarin.Mac, MonoDevelop 2.4 and later.
Supported Frameworks: GroupDocs.Conversion for .NET supports .NET and Mono frameworks.

Get Started

Are you ready to give GroupDocs.Signature for .NET a try? Simply execute Install-Package GroupDocs.Signature from Package Manager Console in Visual Studio to fetch & reference GroupDocs.Signature assembly in your project. If you already have GroupDocs.Signature for .Net and want to upgrade it, please execute Update-Package GroupDocs.Signature to get the latest version.

Please check the GitHub Repository for other common usage scenarios.

Sign a PDF File and Save it in DOCX Format using C# Code

using (Signature signature = new Signature("sample.pdf"))
{
    // create QRCode option with predefined QRCode text
    QRCodeSignOptions signOptions = new QRCodeSignOptions("JohnSmith")
    {
        EncodeType = QRCodeTypes.QR,
        Left = 100,
        Top = 100
    };
    PdfSaveOptions pdfSaveOptions = new PdfSaveOptions()
    {
        FileFormat = PdfSaveFileFormat.DocX,
        OverwriteExistingFiles = true
    };
    // sign document to file
    signature.Sign("SignedPdf.docx", signOptions, pdfSaveOptions);
}

Use C# to Search and Delete Signatures from a DOCX File

// initialize Signature instance
using (Signature signature = new Signature("signed.docx"))
{
    BarcodeSearchOptions options = new BarcodeSearchOptions();
    List<BarcodeSignature> signatures = signature.Search<BarcodeSignature>(options);
    List<BaseSignature> signaturesToDelete = new List<BaseSignature>();
    // collect signatures to delete
    foreach (BarcodeSignature temp in signatures)
    {
        if (temp.Text.Contains("John"))
        {
            signaturesToDelete.Add(temp);
        }
    }
    // delete signatures
    DeleteResult deleteResult = signature.Delete(signaturesToDelete);
    if (deleteResult.Succeeded.Count == signaturesToDelete.Count)
    {
        Console.WriteLine("All signatures were successfully deleted!");
    }
    else
    {
        Console.WriteLine($"Successfully deleted signatures : {deleteResult.Succeeded.Count}");
        Console.WriteLine($"Not deleted signatures : {deleteResult.Failed.Count}");
    }
    Console.WriteLine("List of deleted signatures:");
    foreach (BaseSignature temp in deleteResult.Succeeded)
    {
        Console.WriteLine($"Signature# Id:{temp.SignatureId}, Location: {temp.Left}x{temp.Top}. Size: {temp.Width}x{temp.Height}");
    }
}

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