Unplanned
Last Updated: 03 Nov 2025 09:07 by ADMIN
Scheduled for 2025 Q4
Carl
Created on: 03 Nov 2025 08:11
Category: Reporting
Type: Bug Report
1
Switching to PrintPreview Mode of the Win UI Report Viewer crashes the application

I'm using the WinUI Report Viewer in my .NET 8 WinUI3 desktop application.  All my reports initially render and display correctly, however, when the user clicks on the Print Preview button to switch to the print preview view, it causes my app to crash. This only occurs when using Versions 19.1.25.521 and above of the Telerik.ReportViewer.WinUI package. If I roll the NuGet back down to versions 19.0.25.313 and below, my application happily switches between interactive and print preview view without error.

Interestingly, if I force the Report Viewer to start in print preview view (with ViewMode="PrintPreview" in the xaml), it displays without error (though the toolbar print preview button is not showing as being toggled).  I can then also switch to interactive mode once without error by toggling the print preview button. However, if I then attempt to switch back to the print preview mode, it again crashes.

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