I have no idea how to reproduce this, but every so often after a paste operation into a RadRichTextBox, the host thread becomes unresponsive to user input. The message pump is still running but the following unhandled exception gets thrown in a tight infinite loop. The only way to close the window is to right click on the taskbar button.

System.NullReferenceException
Message: Object reference not set to an instance of an object.
Call Stack:
    at Telerik.Windows.Documents.Layout.LayoutElement.SetParent(LayoutElement newParent)
    at Telerik.Windows.Documents.Layout.LayoutBox.EnsureParent()
    at Telerik.Windows.Documents.Layout.LayoutBox.get_Parent()
    at Telerik.Windows.Documents.Layout.FormattingSymbolLayoutBox.get_IsEndOfCell()
    at Telerik.Windows.Documents.Layout.FormattingSymbolLayoutBox.GetFormattingSymbolVisual()
    at Telerik.Windows.Documents.SpanBoxPositionHandler.get_Location()
    at Telerik.Windows.Documents.UI.DocumentWebLayoutPresenter.GetViewPointFromDocumentPosition(DocumentPosition position)
    at Telerik.Windows.Controls.RichTextBoxUI.PasteOptionsPopup.CalculateLocation()
    at Telerik.Windows.Controls.RichTextBoxUI.PasteOptionsPopup.OnOwnerLayoutUpdated(Object sender, EventArgs e)
    at System.Windows.ContextLayoutManager.fireLayoutUpdateEvent()
    at System.Windows.ContextLayoutManager.UpdateLayout()
    at System.Windows.ContextLayoutManager.UpdateLayoutCallback(Object arg)
    at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks()
    at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)
    at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget)
    at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
    at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

To reproduce:

• Create two lists one after another
• Select the second by using the keyboard 
• Press delete and then Ctrl+z (undo)

This works fine when the list is selected with the mouse. 

When importing from a .docx the RichTextBox is adding a blank line for each continuous section break. You can see this in the attached file - in the RichTextBox there is an extra line between sections that does not exist in the source word document.

This can be reproduced with the provided .docx. In Word the image floats in the empty space below the text but the RichTextBox has it inline and overlapping text.

Removing the rectangle from around the image in the source document has no affect.

Hi support,

We have a problem when we copy a text from MS word to RitchTextBox.
If the text copied uses an style that the namecontains tilde, then style name on the ritchtextbox is broken with strange characters.
All works well with this strange characters, but if you export to html and then import to ritchtextbox, the style is lost ...

This is a big problem because in spanish, many styles have tildes. When our user copy content from word they have problem with html format export / import.


I Attach a MS Word docx with a style with tildes:

Steps to reproduce it:

1- Open MS Word attached.
2- Copy the content.
3- Open a ritchTextBox Editor
4- Paste the content.
5- Export to html
6- Import the html.

You can see now, that the style are lost, and the name of the style contains strange characters.

Similar issue its happen when open a Word Docx with styles with tildes from ritchTextBox, not include strange characters but the style is lost.

Thanks for you support,

Hi Guys,

Our application works with a document storage and we use RadRichTextBox to allow users edit and view the documents. Unfortunately, many documents cannot be opened due to the following exception we get:

Unable to cast object of type 'Telerik.Windows.Documents.Model.FieldRangeStart' to type 'Telerik.Windows.Documents.Model.AnnotationRangeEnd

As result we receive complains from our users. Could you please facilitate with solving it? 

I have attached a simple test application with the problematic document as well the stacktrace. 

Best regards,

Yaroslav 

Hi Telerik,

We are converting XAML content into PDF file with below code.

private byte[] Xaml2Pdf(string xamlContent)
{
	try
	{
		XamlFormatProvider xamlFormatProvider = new XamlFormatProvider();
		PdfFormatProvider pdfFormatProvider = new PdfFormatProvider();
		PdfExportSettings exportSettings = new PdfExportSettings();
		exportSettings.ContentsCompressionMode = PdfContentsCompressionMode.Automatic;
		exportSettings.ContentsDeflaterCompressionLevel = 9;
		exportSettings.DocumentInfo = new PdfDocumentInfo() { Producer = "ALIS", Author = "ALIS", Creator = "ALIS" };
		exportSettings.ImagesCompressionMode = PdfImagesCompressionMode.Automatic;
		exportSettings.ImagesDeflaterCompressionLevel = 9;
		pdfFormatProvider.ExportSettings = exportSettings;

		byte[] content = pdfFormatProvider.Export(xamlFormatProvider.Import(xamlContent));

		return content;
	}
	catch
	{
		throw;
	}
}

Adding bookmarks with the same name programmatically always returns the first one in case use attempts to navigate to it using the Bookmarks dialog. 

Workaround: Remove the bookmark before adding a new one with the very same name.

Open a docx file in richtextbox, if numpages in headers do any subtraction, it can not display correctly. see the attached pictures for how to display in richtextbox and microsoft word 2016.

When cross-reference is added in the header/footer of a document in does not show the available options from the document.

XAML team reviewed this item and noted that it duplicates with another one. Please use the item below in order to track the status of this request.
https://feedback.telerik.com/Project/143/Feedback/Details/210419-richtextbox-add-functionality-to-work-with-cross-references-and-hyperlinks-to-bo

Hi Team,
              I am sending one html body to outlook 2013 which contain bulletedlist, till my desktop app its bullets are looking ok. but after sending it to outlook new email body, there are too much space between bullet and inline text, please provide input, how can i handle it.
I think my bullets having different pattern which outlook 2013 doesn't support.
Do i need to add any other property background position : inside; something like.


Please find the attachments,
Thanks
Deepak

As a result RadDocument instances cannot be collected by the GC.

When the user enter text using the keyboard the PositionChanged event of the CaretPosition is not fired.
The item's status changed to Declined - the LocationChanged event can be used to track when the location of the position has been changed.

StackOverflowException is sometimes thrown while a document containing annotations is updated in the main thread (e.g. by typing in it), and spell checking is enabled.

The exception is thrown in a background thread, which call stack similar to this one:

2f89dfe8 00566287 Telerik.Windows.Documents.Cache.IntervalTree.IntervalNode`2[[System.__Canon, mscorlib],[Telerik.Windows.Documents.Cache.IntervalTree.HierarchicalIndexStruct, Telerik.Windows.Documents]]..ctor(System.Collections.Generic.IEnumerable`1<System.__Canon>)
2f89e084 00566287 Telerik.Windows.Documents.Cache.IntervalTree.IntervalNode`2[[System.__Canon, mscorlib],
...
2f89e4dc 00565cd8 Telerik.Windows.Documents.Cache.RadDocumentChildrenCache.RebuildTree()
2f89e52c 005658c1 Telerik.Windows.Documents.Cache.RadDocumentChildrenCache.Rebuild()
2f89e538 1413b704 Telerik.Windows.Documents.Cache.RadChildrenCacheBase`1[[System.__Canon, mscorlib]].EnsureValid()
2f89e568 00568c72 Telerik.Windows.Documents.Cache.RadDocumentChildrenCache.ContainsAnnotationMarkersOfType[[System.__Canon, mscorlib]]()
2f89e5c0 00568b29 Telerik.Windows.Documents.Cache.RadDocumentChildrenCache.GetContainingAnnotationRanges[[System.__Canon, mscorlib]](Telerik.Windows.Documents.Model.Inline, Boolean)
2f89e618 0056896f Telerik.Windows.Documents.Model.RadDocument.GetContainingAnnotationRanges[[System.__Canon, mscorlib]](Telerik.Windows.Documents.Model.Inline, System.Predicate`1<System.__Canon>, Boolean)
2f89e654 1b6b76d3 Telerik.Windows.Documents.Proofing.DocumentProofingManager.IsPositionInIgnoredRange(Telerik.Windows.Documents.DocumentPosition)
2f89e664 1b6b72e7 Telerik.Windows.Documents.Proofing.DocumentProofingManager+<SplitRangeToUpdate>d__2.MoveNext()
2f89e690 1b6b7019 Telerik.Windows.Documents.Proofing.DocumentProofingManager.UpdateIncorrectWordsList(Telerik.Windows.Documents.DocumentPosition, Telerik.Windows.Documents.DocumentPosition)
2f89e6c0 1b6b6ef2 Telerik.Windows.Documents.UI.Layers.TextDecorationLayers.ProofingErrorsDecorationUILayer+<>c__DisplayClass9.<MarkBoxesWithSpellingErrorsAsynch>b__5()
2f89e6d0 1b612094 Telerik.Windows.Documents.Utils.DelayedExecution.ExecuteAction(Boolean)
2f89e6e4 1b6b6e34 Telerik.Windows.Documents.Utils.DelayedExecution.OnThreadingTimer(System.Object)
2f89e704 65fa5b38 System.Threading.TimerQueueTimer.CallCallbackInContext(System.Object)
2f89e708 65fc4157 System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
2f89e774 65fc4096 System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
2f89e788 65fa5a81 System.Threading.TimerQueueTimer.CallCallback()
2f89e7bc 65fa593c System.Threading.TimerQueueTimer.Fire()
2f89e7fc 65fa5861 System.Threading.TimerQueue.FireNextTimers()
2f89e83c 65fa5724 System.Threading.TimerQueue.AppDomainTimerCallback()
2f89ea68 66d73de2 [DebuggerU2MCatchHandlerFrame: 2f89ea68] 

Note: Until 2017 R2 SP1 release StackOverflowException is thrown, after this release an ArgumentException should be thrown.
Declined: Not reproducible anymore.

We have a legacy system that generates RTF using some native RTF controls. The RTF generated by this application is compatible with MS wordpad. But seems that the RadRichTextBox is not compatible. The problem is when we use bullets.

Consider we create an RTF with bullets, using legacy -

   * Legacy Bullet 1
   * Legacy Bullet 2
   * Legacy Bullet 3

Then, this is the RTF that is generated -

{\rtf1\fbidis\ansi\ansicpg1252\deff0{\fonttbl{\f0\fnil\fcharset0 Segoe UI;}{\f1\fnil\fcharset0 Arial;}{\f2\fnil\fcharset2 Symbol;}}

{\colortbl ;\red0\green0\blue0;}
\viewkind4\uc1\pard\ltrpar\cf1\lang1033\f0\fs22\par
\pard{\pntext\f2\'B7\tab}{\*\pn\pnlvlblt\pnf2\pnindent0{\pntxtb\'B7}}\ltrpar\fi-200\li200\tx360 Legacy Bullet 1\par
\pard{\pntext\f2\'B7\tab}{\*\pn\pnlvlblt\pnf2\pnindent0{\pntxtb\'B7}}\ltrpar\fi-200\li200\tx360\tx360 Legacy Bullet 2\par
\pard{\pntext\f2\'B7\tab}{\*\pn\pnlvlblt\pnf2\pnindent0{\pntxtb\'B7}}\ltrpar\fi-200\li200\tx360\tx360\tx360 Legacy Bullet 3\par
\pard\ltrpar\tx360\tx360\tx360\par
\f1\par
}
----------------------------------------------------------------------

Now, if we open this RTF in Wordpad, then the bullets are displayed correctly.

But the bullets are not displayed when we bind the RTF to RadRichTextBox.

It displays something like this -

Legacy Bullet 1
Legacy Bullet 2
Legacy Bullet 3

And after binding the original RTF, if we now try to get the RTF this is how it looks like - 

{\rtf\ansi\ansicpg1252\uc1\deff0\deflang1033{\fonttbl{\f0 Verdana;}{\f1 Segoe UI;}{\f2 Arial;}}{\colortbl\red0\green0\blue0 ;;}{\*\defchp\ltrch\f0\fs24\i0\b0\strike0\cf0\cb1\highlight1\ulc0\ulnone}{\*\defpap\sl276\slmult1\sa180}{\stylesheet{\s0\sqformat\spriority0\ltrch\f0\fs24\i0\b0\strike0\cf0\cb1\highlight1\ulc0\ulnone\sl276\slmult1 Normal;}{\*\ts2\tsrowd\spriority59\trbrdrt\brdrnone\trbrdrb\brdrnone\trbrdrl\brdrnone\trbrdrr\brdrnone\trbrdrh\brdrnone\trbrdrv\brdrnone\trgaph0\clpadft3\clpadt0\clpadfr3\clpadr0\clpadfl3\clpadl0\clpadfb3\clpadb0\tsvertalt\ltrch\f0\fs24\i0\b0\strike0\cf0\cb1\highlight1\ulc0\ulnone\sl276\slmult1 Table Normal;}}\nouicompat\viewkind4\paperw12240\paperh15840\margl1425\margr1425\margt1425\margb1425\deftab720\sectd\pgwsxn12240\pghsxn15840\marglsxn1425\margrsxn1425\margtsxn1425\margbsxn1425\headery720\footery720\pard\s0\ltrpar\sl240\slmult1{\ltrch\f1\fs22\i0\b0\strike0\cf0\cb1\highlight1\ulc0\ulnone\par}\pard\s0\ltrpar\tx360\sl240\slmult1\li200\lin200\fi-200{\ltrch\f1\fs22\i0\b0\strike0\cf0\cb1\highlight1\ulc0\ulnone Legacy Bullet 1}{\ltrch\f1\fs22\i0\b0\strike0\cf0\cb1\highlight1\ulc0\ulnone\par}\pard\s0\ltrpar\tx360\sl240\slmult1\li200\lin200\fi-200{\ltrch\f1\fs22\i0\b0\strike0\cf0\cb1\highlight1\ulc0\ulnone Legacy Bullet 2}{\ltrch\f1\fs22\i0\b0\strike0\cf0\cb1\highlight1\ulc0\ulnone\par}\pard\s0\ltrpar\tx360\sl240\slmult1\li200\lin200\fi-200{\ltrch\f1\fs22\i0\b0\strike0\cf0\cb1\highlight1\ulc0\ulnone Legacy Bullet 3}{\ltrch\f1\fs22\i0\b0\strike0\cf0\cb1\highlight1\ulc0\ulnone\par}\pard\s0\ltrpar\tx360\sl240\slmult1{\ltrch\f1\fs22\i0\b0\strike0\cf0\cb1\highlight1\ulc0\ulnone\par}\pard\s0\ltrpar\tx360\sl240\slmult1{\ltrch\f2\fs22\i0\b0\strike0\cf0\cb1\highlight1\ulc0\ulnone\par}}

-Amul.

A NullReference exception is thrown when the content of a MS Outlook mail is copy/pasted into RadRichTextBox. 

This is reproducible in Paged LayoutMode.

Html exported from RadRichTextBox will be shown in Outlook with some formatting issues related to lists. The text in a paragraph will be shown with the formatting of its bullet.

The reason is that the content is exported to HTML as a styled list level which Outlook does not understand. The same applies to MS Word as well. This can also lead to formatting issues when the document is later imported in RichTextBox.

You can check the attached screenshot for reference.

Workaround: 
Change the styles to export as inline properties:
htmlProvider.ExportSettings.StylesExportMode = StylesExportMode.Inline;

This item is duplicated. Please follow the other item at http://feedback.telerik.com/Project/143/Feedback/Details/159291.

I have tried to use the RichTextBox, but found that it does not work very well when it comes to measure the text. This results in clipped text and that the caret can be displayed in a different place then expected.
This can easily be seen with a font like Gabriola, which uses complex kerning metrics. Type a text with a lot of "ff" and "fi" and you will soon see that your caret gets out of sync and that text is sometimes clipped.
When I look at the code of RichTextBox it seems to me that it uses its own calculation of text widths and that the this is based on a very simple method using just the kerning information. There is also a hard coded list containing information which fonts that has kerning info and which fonts that are mono spaced. It seems strange to me to have this in a config file since there is a large number of fonts used by the users.
It also seem to look at the Unicode character family in order to determine if ligatures are used or not, which is also quite strange since ligatures can be used for western characters too. The font Gabriola is an example of this. Look at "fi" in a word like "fine".
It can potentially consume a lot of memory since I think that it builds a dictionary of the kerning of all pairs of characters for all fonts that it encounters.
I guess this way of doing things were made for performance, but unfortunately, good performance doesn't help much if it doesn't work.
I am not sure if I should report this as a bug, since it is more of a fatal design issue of the whole control.