GroupDocs.Signature 20.4.0

.NET API for Document Signature

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 list of signatures from a document.
• Determine if the document contains signatures meeting a 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 QR-code signature or embed custom data objects.

New Features in Version 20.4

• Involved full featured JSON serialization and de-serialization support.
• Extended QR-Code & Barcode Signature with image data content.
• Implemented ability to store creation and update date for signatures.

For the detailed notes, please visit GroupDocs.Signature for .NET 20.4 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, GIF, JPG, JPEG, PNG, SVG, TIF, TIFF, WEBP CorelDraw: CDR, CMX Photoshop: PSD eBook: DJVU 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 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.

Getting Started with GroupDocs.Signature for .NET

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 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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