Toolbar customization
To customize the export options in the Bold Reports® UWP Report Viewer toolbar, use the ExportOptions property to show or hide the default export types.
How do I show or hide the export options?
To show or hide the default export types in the UWP Report Viewer, use the ExportOptions property. The following code hides the HTML export type from the default export options.
this.ReportViewer.ExportOptions = BoldReports.UI.Xaml.ExportOptions.All & ~BoldReports.UI.Xaml.ExportOptions.Html;