This happens only in scenarios when the widget has On state appearance defined and Off state appearance missing. If both appearances are missing then RadPdfViewer recalculates the appearances and the checkbox is successfully selected and deselected.
Loading a document that contains big images could lead to OutOfMemory exception.
This exception is thrown because there is field name with special characters which are incorrectly modified during the recalculation process of widget appearances. This exception is thrown in the internal RecalculateMissingAppearances method or in RecalculateWidgetAppearancesOld method.
For some fonts the issue is present. Some of them are: KozGoPro-Medium KozMinPro-Regular KozGoPro-Bold
This might result in invisible annotations.
The PdfViewer won't load a document from PdfDocumentSource created from Uri and the ReadOnDemand option. Here is an example: new PdfDocumentSource(new Uri("webaddress/somefile.pdf"), FormatProviderSettings.ReadOnDemand); Available in LIB Version 2017.1.130
The instances are kept in GeometryRenderer cache and each time the content stream is parsed new PathGeometry instances are added to GeometyRenderer store Dictionary field. Available in R1 2017 Official Release Version.
This usually results in a single colored rectangle instead of a gradient filled rectangle. Available in R1 2018 SP2 release version.
With the current implementation, it takes seconds to decode and display JPEG with several megapixels (for example size 4000 x 2000 pixels). The memory consumption when decoding such images also needs improvements. Workaround: Custom DctDecode filter may be implemented and registered in RadPdfViewer. The attached demo shows how this may be achieved by using BitmapImage class to decode the JPEG images instead of the default RadPdfViewer's JpegDecoder.
If the presenter is changed (for example, by pressing "Fit one full page to window" button) during the inertia of a scroll operation, NullRererenceException is thrown. Fix available in LIB Version 2017.2.627.
Customers are reporting an issue when trying to copy content in an application hosted on a remote machine (there are reports using TigerVNC and Citrix). The exception is thrown from the Clipboard class with a message: OpenClipboard failed (Exception from HRESULT: 0x800401D0 (CLIPBRD_E_CANT_OPEN)). It seems like such a behavior could be reproduced when the clipboard is already opened by another application. Here is a discussion on the matter: https://stackoverflow.com/questions/68666/clipbrd-e-cant-open-error-when-setting-the-clipboard-from-net Fix available in LIB Version 2018.3.1029.
When importing documents containing Interactive FormFields with an empty collection of Normal state appearances, a NullReferenceException is thrown, which leads to non-editable FormFields in PdfViewer. Fix available in LIB Version 2018.2.730.
Instead, we should not visualize them and they should not be interactable with the mouse. Fix available in LIB Version 2018.2.730.
RadPdfViewer's AcroForm property ViewersShouldRecalculateWidgetAppearances should be respected when being set to true. In this case, RadPdfViewer should recalculate all widget appearances and this would resolve the issue with empty form field widgets after opening such PDF document.