DOCX & Other Export format in Winforms Viewer

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Report Viewer - WinForms
Richard
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Richard asked on 17 Nov 2025, 01:28 PM

I'm hoping there's a way to add the additionally supported report export formats such as DOCX, XLSX etc to the Winforms Report Viewer?

I've been able to hide Tiff using the config section, but there seems to be no way (either there or through the Viewer's properties) to allow additional supported formats

Is the only option to hide the export button on the Viewer and implement my own Export?

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Petar
Telerik team
answered on 20 Nov 2025, 08:15 AM

Hello Richard,

The WinForms report viewer supports both XLSX and DOCX formats natively, but these rendering formats rely on the `Telerik.Reporting.OpenXmlRendering` or `Telerik.Reporting.OpenXmlRendering3` (with "3" at the end) packages. The choice between these packages depends on the version of `DocumentFormat.OpenXml` that you have installed in your project.

Could you please let me know if you have installed either of these Telerik Reporting packages? If you haven't, here is what you can do:

  • If you are using `DocumentFormat.OpenXml` version lower than 3.0.0, install `Telerik.Reporting.OpenXmlRendering`.
  • If you are using `DocumentFormat.OpenXml` version 3.0.0 or higher, install `Telerik.Reporting.OpenXmlRendering3`.

If you do not have `DocumentFormat.OpenXml` installed, you can simply install either of the two Telerik Reporting NuGet packages. The compatible version will be automatically installed as it is included as a dependency in the NuGet package.

We also have a knowledge base article on this topic: Missing Export Options in Viewers or Rendering Format Not Available.

Including the correct package should automatically enable the OpenXML rendering formats (DOCX, PPTX, XLSX), but if you need further help with this matter, please let me know, and I will do my best to assist you.

Regards,
Petar
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Richard
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commented on 20 Nov 2025, 09:23 AM

Perfect - many thanks - works exactly as stated.
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