Last Updated: 01 Oct 2019 12:40 by ADMIN
Release 2019.3.1007 (10/07/2019)
In this example, the current synchronization context is "occupied" by the task that sets the RTF string forcing the arrange tasks to wait for it to complete before they can start. However, it can never complete as it is blocked by the wait call for the arrange tasks that will never run, causing a deadlock. 
Last Updated: 01 Oct 2019 10:47 by ADMIN
Release 2019.3.1007 (10/07/2019)
System.InvalidOperationException: Cannot use a DependencyObject that belongs to a different thread than its parent Freezable. is thrown when multiple RadRichTextBoxes are instantiated in different STA threads. The cause seems to be a static freezable resource.
Last Updated: 11 Sep 2019 06:23 by ADMIN
Release LIB 2019.2.819
The exception is thrown due to an empty byte[] which is applied to the image source.
Last Updated: 10 Sep 2019 14:10 by ADMIN
Release R3 2019
Created by: Abhishek
Comments: 0
Category: RichTextBox
Type: Bug Report
When opening a document which contains date fields, RadRichTextBox doesn't update their values.
Workaround: Invoke UpdateAllFields() or UpdateField().
Last Updated: 14 Aug 2019 10:40 by ADMIN
Release LIB 2019.2.819 (08/19/2019)
EnableAsynchronousTextInsertion is not respected in a custom caret and any text input is now process asynchronously. 
Last Updated: 02 Aug 2019 15:01 by ADMIN
Release LIB 2019.2.805 (08/05/2019)
If the document contains a style that is based on a style with a duplicate name, RadDocument detects it as a cycle in style inheritance. 
Last Updated: 25 Jul 2019 13:36 by ADMIN
Release LIB 2019.2.729 (07/29/2019)
When a gif or tif image is copied and then pasted into the document does not result in the original image. "Image not found" icon appears instead.
Last Updated: 10 Jul 2019 08:41 by ADMIN
Release LIB 2019.2.715 (07/15/2019)
The exception is thrown while typing and is with message "Value cannot be null. Parameter name: insertIMETextCommandContext". 
Last Updated: 10 Jun 2019 12:57 by ADMIN
Release LIB 2019.2.610 (06/10/2019)
When a text doesn't specify font explicitly with \fN tag, and default character properties (\defchp) are not specified, or are specified but without font set, the font of the text is visualized with the default font - Verdana. Instead, the default font for the document should be used - defined with \deffN tag.
Last Updated: 28 May 2019 13:05 by ADMIN
The generated ImageSource is associated with the import thread, while the UI invokes layout logic, which depends on that image, on the main thread. This causes a cross thread access exception.
Last Updated: 28 May 2019 10:46 by ADMIN
When the attribute is defined but no value is set to it, the format provider cannot import the content and throws NullReferenceException.
Last Updated: 16 May 2019 14:09 by ADMIN
The exception is thrown by the SystemFontsManager internal class from Telerik.Windows.Documents.Core, so it can observed when using RadPdfViewer, RadRichTextBox, RadSpreadsheet.

The reason is not clear, posssible causes are:
- Corrupted fonts after upgrade from Windows XP
- Enabling of Block untrusted fonts feature ( )

The call stack is as follows:

System.TypeInitializationException: The type initializer for 'Telerik.Windows.Documents.Core.Fonts.SystemFontsManager' threw an exception. ---> System.IO.FileNotFoundException: Unable to find the specified file.
   at MS.Internal.Text.TextInterface.Native.Util.ConvertHresultToException(Int32 hr)
   at MS.Internal.Text.TextInterface.FontList.get_Item(UInt32 A_0)
   at MS.Internal.Text.TextInterface.FontList.FontsEnumerator.get_Current()
   at MS.Internal.FontFace.TypefaceCollection.Enumerator.get_Current()
   at System.Windows.Media.Fonts.TypefaceCollection.<GetEnumerator>d__11.MoveNext()
   at Telerik.Windows.Documents.Core.Fonts.SystemFontsManager..cctor()


Manually delete all registry key values in Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Fonts pointing to files outside of the Fonts folder.
Last Updated: 16 May 2019 13:51 by ADMIN
In some cases when an image is copied from an external source and pasted in the rich text box, the image is not displayed. This is caused by the Clipboard.GetImage() method used internally by the control. 

To work this around, you can subscribe for the CommandExecuting event of RadRichTextBox and manually get the image from the clipboard.

private void Rtb_CommandExecuting(object sender, Telerik.Windows.Documents.RichTextBoxCommands.CommandExecutingEventArgs e)

	PasteCommand command = e.Command as PasteCommand;
	if (command != null && (Clipboard.GetData("DeviceIndependentBitmap") != null))
		//Get the image stream from the clipboard.
		//You can check the following blog post for an approach which you can use to get the image properly:
		this.radRichTextBox.InsertImage(imageStream, "jpeg");
		e.Cancel = true;
Last Updated: 16 May 2019 13:15 by ADMIN
Using Microsoft Pinyin IME for typing in the RichTextBox causes FatalExecutionEngineError exception. 

Last Updated: 24 Apr 2019 06:34 by ADMIN
Created by: stéphane
Comments: 1
Category: RichTextBox
Type: Bug Report
The text for the Documents_SpellCheckingDialog_ChangeAll key must be "Changer tout" instead of  "Chanter tout".
Last Updated: 28 Mar 2019 12:59 by ADMIN
Currently the logic that sets ChangeFontSizeCommand up relies on RadComboBoxItem.Tag to be used as a command parameter. Although FontSize semantically is a numeric value, the  command only works with string parameters.
Last Updated: 25 Mar 2019 12:15 by ADMIN
The event is not fired when updating the IncludePictureField fields. It is also valid when the fields are in Header or Footer. The issue is a regression in R1 2019.

The UpdateAllFields() method of RadDocumentEditor can be invoked so the event can be fired and give you the possibility to update the images.
Last Updated: 25 Mar 2019 11:31 by ADMIN
HTML parser does not handle the described scenario properly. Nevertheless this is not a valid css snippet, app should not be brought to inoperable state.
Last Updated: 25 Mar 2019 09:27 by ADMIN
Quickly adding/removing of tab stop from the document's ruler crashes the application.
Last Updated: 13 Mar 2019 13:40 by ADMIN
When RadRichTextBox.IsReasdOnly is true, RadRichTextBox.CommandExecuting is not raised when the user double clicks the header or footer area.
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