ONE File Viewer for C# .NET Applications

.NET document viewer API to read, render and display ONE file in any type of C#, ASP.NET, VB.NET & .NET Core applications. View the rendered files with true formatting & layout in HTML5, PDF or as an image using a few lines of the code.

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About GroupDocs.Viewer for .NET API

Start viewing 170+ popular document formats in your .NET applications using GroupDocs.Viewer for .NET APIs by adding a few lines of code. Developers can easily display PDF, Word Processing, Excel Spreadsheet, Presentation, Visio, Project, Outlook and many other popular document formats in HTML5, image or PDF modes. The document rendering is fast, identical to the original source file, and it does not require installing Microsoft Office or any other external libraries.

Steps for Viewing ONE File in C#

GroupDocs.Viewer makes it easy for .NET developers to add ONE file viewing feature in their applications by implementing a few easy steps.

  • Create an instance of Viewer class and load the ONE file with full path.
  • Set options to convert ONE file into PNG format.
  • Convert file and check output in the current directory.

System Requirements

GroupDocs.Viewer for .NET APIs are supported on all major platforms and operating systems. Before executing the code below, please make sure that you have the following prerequisites installed on your system.

  • Operating Systems: Microsoft Windows, Linux, MacOS
  • Development Environments: Microsoft Visual Studio, Visual Studio Code, .NET CLI
  • Frameworks: .NET Framework, .NET Standard, .NET Core, .NET
  • Get the latest version of GroupDocs.Viewer for .NET from Nuget

// Instantiate viewer
using (Viewer viewer = new Viewer("sample.one"))
{
	// Set view options 
	ViewOptions viewOptions = new PngViewOptions();
	// Convert file to PNG and check the output in the current directory 
	viewer.View(viewOptions);
}

ONE Viewer Live Demos

Display ONE file right now by visiting GroupDocs.Viewer Live Demos website.
The live demo has the following benefits

No need to download GroupDocs API.

No need to write any code

Just upload the source file to have an instant display.

Get the download link to save the file on your machine.

About ONE File Format

File represented by .ONE extension are created by Microsoft OneNote application. OneNote lets you gather information using the application as if you are using your draftpad for taking notes. OneNote files can contain different elements that can be placed at non-fixed locations on document pages. These elements may contain text, digitized handwriting, and objects copied from other applications including images, drawings and multimedia (audio/video) clips. Microsoft now offers online version of OneNote as part of Office365 where Notes can be shared with other OneNote users over the internet.

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Other File Formats Rendering & Viewing

Multi format documents and images viewer API for .NET. View some of the popular file formats below without any external viewers.

.NET DOC Viewer

(Microsoft Word Document)

.NET DOCM Viewer

(Microsoft Word Macro-Enabled Document)

.NET DOCX Viewer

(Microsoft Word Open XML Document)

.NET DOT Viewer

(Microsoft Word Document Template)

.NET DOTM Viewer

(Microsoft Word Macro-Enabled Template)

.NET DOTX Viewer

(Word Open XML Document Template)

.NET RTF Viewer

(Rich Text File Format)

.NET TXT Viewer

(Plain Text File Format)

.NET XLS Viewer

(Microsoft Excel Binary File Format)

.NET XLSX Viewer

(Microsoft Excel Open XML Spreadsheet)

.NET XLSM Viewer

(Microsoft Excel Macro-Enabled Spreadsheet)

.NET XLSB Viewer

(Microsoft Excel Binary Spreadsheet File)

.NET XLTX Viewer

(Microsoft Excel Open XML Template)

.NET TSV Viewer

(Tab Separated Values File)

.NET XLAM Viewer

(Microsoft Excel Macro-Enabled Add-In)

.NET CSV Viewer

(Comma Separated Values File)

.NET PPT Viewer

(PowerPoint Presentation)

.NET PPS Viewer

(Microsoft PowerPoint Slide Show)

.NET PPTX Viewer

(PowerPoint Open XML Presentation)

.NET PPSX Viewer

(PowerPoint Open XML Slide Show)

.NET POTX Viewer

(Microsoft PowerPoint Open XML Template)

.NET POTM Viewer

(Microsoft PowerPoint Template)

.NET PPTM Viewer

(Microsoft PowerPoint Presentation)

.NET PPSM Viewer

(Microsoft PowerPoint Slide Show)

.NET PDF Viewer

(Adobe Portable Document Format)

.NET XPS Viewer

(Open XML Paper Specification)

.NET TEX Viewer

(LaTeX Source Document)

.NET ODS Viewer

(Open Document Spreadsheet)

.NET ODP Viewer

(OpenDocument Presentation File Format)

.NET OTP Viewer

(Origin Graph Template)

.NET ODT Viewer

(Open Document Text)

.NET OTT Viewer

(Open Document Template)

.NET VST Viewer

(Microsoft Visio 2003-2010 XML Drawing)

.NET TIFF Viewer

(Tagged Image File Format)

.NET JPEG Viewer

(JPEG Image)

.NET PNG Viewer

(Portable Network Graphic)

.NET GIF Viewer

(Graphical Interchange Format File)

.NET BMP Viewer

(Bitmap File Format)

.NET ICO Viewer

(Microsoft Icon File)

.NET PSD Viewer

(Adobe Photoshop Document)

.NET WMF Viewer

(Windows Metafile)

.NET EMF Viewer

(Enhanced Metafile Format)

.NET WEBP Viewer

(Raster Web Image File Format)

.NET SVG Viewer

(Scalable Vector Graphics File)

.NET JP2 Viewer

(JPEG 2000 Core Image File)

.NET MPP Viewer

(Microsoft Project Document)

.NET MPT Viewer

(Microsoft Project Template)

.NET HTML Viewer

(Hyper Text Markup Language)

.NET MHT Viewer

(MIME Encapsulation of Aggregate HTML)

.NET MHTML Viewer

(MIME Encapsulation of Aggregate HTML)

.NET MSG Viewer

(Microsoft Outlook E-mail Message)

.NET EML Viewer

(E-mail Message)

.NET ONE Viewer

(Microsoft OneNote)

.NET WMF Viewer

(Windows Metafile)

.NET EMF Viewer

(Windows Enhanced Metafile)

.NET PSD Viewer

(Adobe Photoshop Document)

.NET VSD Viewer

(Microsoft Visio 2003-2010 Drawing)

.NET VSDX Viewer

(Microsoft Visio Drawing)

.NET VSS Viewer

(Microsoft Visio 2003-2010 Stencil)

.NET VDX Viewer

(Microsoft Visio 2003-2010 XML Drawing)

.NET VDW Viewer

(Microsoft Visio 2010 Web Drawing)

.NET EPUB Viewer

(Digital E-Book File Format)