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Sign DOCX File with Digital Signatures in .NET

Digitally sign and verify signatures in a DOCX file and various other document formats within C#, ASP.NET, VB.NET & Xamarin applications. Implement Barcode, Text, Image, Metadata, QR Code, Form Field and stamp signatures in multiple forms by setting up customized text, font style, colors and adjusting advanced e-signatures properties in the document.

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How to Digitally Sign DOCX Files in C#

Conholdate.Total for .NET supports signing DOCX documents with digital signatures using a few lines of C# .NET code.

  • Instantiate Signature with input document
  • Instantiate DigitalSignOptions object with certificate details
  • Call Sign method of Signature class and pass DigitalSignOptions to it
  • Set options to view signed document as HTML

APIs Download & Installation Instructions

The following piece of code requires GroupDocs.Signature & GroupDocs.Viewer namespaces. You can get the respective files from the downloads or fetch the whole package from NuGet.

Sign your digtial documents with Barcode, Text, Image, Metadata, QR Code, Form Field and stamp signatures on operating systems such as Windows, Linux or macOS while using platforms such as Windows Azure, Mono and Xamarin.


Search Barcode Signatures in PDF File in C#

Search a wide variety of e-signature types from a digitally signed PDF document by setting up advanced signatures manipulation options and search filters to get a list of electronic signatures that match with the search criterion.

  • Instantiate Signature with input document
  • Instantiate DigitalSearchOptions object as per requirements and specified search options
  • Call Search method of Signature class instance and pass DigitalSearchOptions to it

Sign, Verify, Update & Delete Signatures

Using Conholdate.com APIs – developers can implement different signatures customization options to add and view e-signatures from a wide range of popular document file formats.

Users can also search and verify some specific signatures from an already signed digital document; manipulate signatures based on size or textual content and delete any signatures from the same document.


What is DOCX file format?

The DOCX file format serves as a storage medium for documents created in Microsoft Word, succeeding the earlier DOC format. It is a constituent of the Microsoft Office Open XML format and functions as the primary file format for Microsoft Word 2007 and subsequent versions. Introduced alongside Microsoft Office 2007 on January 17, 2007, the DOCX format is built upon the Open Packaging Conventions (OPC), an open XML-based file format developed by Microsoft for office documents.

Utilizing a combination of ZIP file structure and XML files, the DOCX format adheres to the OPC standards, which ensure consistent storage of digital content in a universally compatible file format. By employing the widely recognized ZIP compression format, DOCX files can significantly reduce in size compared to their predecessor, the DOC format. This compression feature allows for efficient storage, transmission, and sharing of DOCX documents across the internet.

The widespread adoption of DOCX as the preferred file format in most office programs can be attributed to its user-friendly nature. It offers enhanced usability, faster document creation, and easier transferability compared to other formats. Additionally, DOCX files are readily viewable and accessible on various applications and devices, including smartphones, tablets, and personal computers. This versatility enables seamless document handling and ensures compatibility across different platforms.

An important aspect of the DOCX format lies in its promotion of compatibility among different applications. By utilizing a standardized format, DOCX eliminates the need for reliance on proprietary file formats that may suffer from compatibility issues. Its widespread acceptance and usage make DOCX a valuable tool within the business world, streamlining document exchange and collaboration.

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Popular Document Signature Options with .NET

Sign PDF Files

(Portable Document Format)

Sign WORD Files

(Word Processing Files)

Sign EXCEL Files

(Spreadsheet Files)

Sign DOC Files

(Microsoft Word Binary Format)

Sign DOCX Files

(Office 2007+ Word Document)

Sign DOCM Files

(Microsoft Word 2007 Marco File)

Sign DOT Files

(Microsoft Word Template Files)

Sign DOTM Files

(Microsoft Word 2007+ Template File)

Sign DOTX Files

(Microsoft Word Template File )

Sign XLS Files

(Microsoft Excel Spreadsheet (Legacy))

Sign XLSB Files

(Excel Binary Workbook)

Sign XLSM Files

(Macro-enabled Spreadsheet)

Sign XLSX Files

(Open XML Workbook)

Sign XLTM Files

(Excel Macro-Enabled Template)

Sign XLTX Files

(Excel Template)

Sign PPT Files

(Microsoft PowerPoint 97-2003)

Sign PPTX Files

(Open XML presentation Format)

Sign PPS Files

(PowerPoint Slide Show)

Sign PPSX Files

(PowerPoint Slide Show)

Sign POTX Files

(Microsoft PowerPoint Template Presentation)

Sign POTM Files

(Microsoft PowerPoint Template File)

Sign CMX Files

(Corel Metafile Exchange Image)

Sign BMP Files

(Bitmap Image File)

Sign JPEG Files

(Joint Photographic Expert Group Image)

Sign GIF Files

(Graphical Interchange Format)

Sign PNG Files

(Portable Network Graphic)

Sign WEBP Files

(Raster Web Image Format)

Sign TIFF Files

(Tagged Image File Format)

Sign WMF Files

(Windows Metafile)

Sign PSD Files

(Photoshop Document)

Sign SVG Files

(Scalar Vector Graphics)

Sign ODP Files

(OpenDocument Presentation Format)

Sign OTP Files

(OpenDocument Standard Format)

Sign ODS Files

(OpenDocument Spreadsheet)

Sign OTS Files

(OpenDocument Spreadsheet Template)

Sign ODT Files

(OpenDocument Text File Format)

Sign OTT Files

(OpenDocument Standard Format)

Sign IMAGE Files

(Digital Image Files)

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