Last Updated: 20 Jan 2020 12:14 by ADMIN
 The scroll is jumping when making a selection and reaching the end of the document (see attached)
Last Updated: 20 Jan 2020 12:07 by ADMIN
Release R1 2020 SP1 (LIB 2020_1_120)
Last Updated: 17 Dec 2019 11:11 by ADMIN

I have a RadRichTextEditor. When it contains multiple lines a vertical scroll bar is shown. When I keep writing and press the enter key to insert a carriage return, it starts a new paragraph but the cursor disappears. 

When I press return at the bottom of this control I want the cursor to be kept in sight. See the screenshots I have attached. You can see that after the return you can only see the very top of the cursor, the rest is hidden. You have to actually manually scroll down to get it into view.

When you start typing, this cursor comes into view, but I want it to be in view even if you just press return. Is there a way to get it to do this?

This seems to be the default behavior of this control, as I have created a new application to show this, which doesn't contain any of the formatting which my actual application does.

Last Updated: 12 Dec 2019 13:50 by ADMIN
RadRichTextEditor renders the text with a little bigger characters spacing than RadRichTextBox and MS Word.
Last Updated: 19 Nov 2019 07:34 by ADMIN

In Word, for paragraphs in a list:

1. The bullet/number uses the value of the first line indent

2.1 The text on the first line is aligned according to the left indent when the left indent is smaller than the first line indent (the usual case).

2.2 If the first line indent is smaller than the left indent, the first line aligns with the rest of the text, using the value of the left indent property.

2.3 When there are tab stops, they are used for the position of the text. In RadRichTextBox, the text in the first line always aligns according to the FirstLine indent.

Also, tab stops can be used to position the text after the bullet/number.

Under Review
Last Updated: 13 Nov 2019 08:32 by ADMIN
Created by: Larry
Comments: 1
Category: RichTextEditor
Type: Bug Report
There appears to be an issue when adding Comments that overlap each other. I will attach a video to my next reply that shows how to replicate the issue.
Last Updated: 07 Nov 2019 14:19 by ADMIN
Release R1 2020 (LIB 2019.3.1111)

The tab order in the dialog is incorrect, the dialog is not focused when shown.


public partial class Form1 : Form
    public Form1()

        radRichTextEditor1.RichTextBoxElement.FindReplaceDialog = new MyFindReplaceDialog();

class MyFindReplaceDialog : FindReplaceDialog
    public MyFindReplaceDialog()
        this.Controls[0].TabIndex = 2; // FindNext button
        this.Controls[1].TabIndex = 3; // Replace Button
        this.Controls[2].TabIndex = 5; // CloseButton
        this.Controls[3].TabIndex = 4; // Replace All button
        //this.Controls[4].TabIndex = 5; // label
        //this.Controls[5].TabIndex = 5; // label
        this.Controls[6].TabIndex = 1; // RepalceWith textbox
        this.Controls[7].TabIndex = 0; // TextToFind  textbox

    protected override void OnShown(EventArgs e)

Last Updated: 09 Oct 2019 11:51 by ADMIN
Release R3 2019 SP1


   at Telerik.WinForms.Documents.FormatProviders.OpenXml.Docx.Export.DocumentThemeExporter.GetFormatScheme()
   at Telerik.WinForms.Documents.FormatProviders.OpenXml.Docx.Export.DocumentThemeExporter.get_FormatScheme()
   at Telerik.WinForms.Documents.FormatProviders.OpenXml.Docx.Export.DocumentThemeExporter.ExportFormatScheme()
   at Telerik.WinForms.Documents.FormatProviders.OpenXml.Docx.Export.DocumentThemeExporter.Export()
   at Telerik.WinForms.Documents.FormatProviders.OpenXml.Docx.Export.DocxExporter.AddXmlContentToPackage(DocxPartExporterBase exporter)
   at Telerik.WinForms.Documents.FormatProviders.OpenXml.Docx.Export.DocxExporter.Export()
   at Telerik.WinForms.Documents.FormatProviders.OpenXml.Docx.DocxFormatProvider.Export(RadDocument document, Stream output)

Last Updated: 05 Sep 2019 10:17 by ADMIN
When deleting all content (e.g. Select All [CTRL+A] + Delete [Del]) in the document, it would be convenient for the user to preserve all formatting (local span formatting + local paragraph formatting + style) applied on the last paragraph. 

This will ensure that the user will continue edit the document with last current font, font family, etc.

If this operation is applied on an empty document, though, the styling of the single paragraph should be reset to the defaults for the document.
Last Updated: 26 Aug 2019 11:41 by ADMIN
When trying to import a document containing bookmark and BookmarkRangeEnd is after the last paragraph, a StackOverflowException is thrown in IntervalNode while trying to rebuild the document cache. (RadDocumentChildrenCache.RebuildTree()).

The same could be observed if the bookmark end is last in the header/footer, between table cells in the RadDocument body, or when all paragraphs after the bookmark range end are hidden (with vanish property).

Workaround: Detect the problematic annotations and remove them:
foreach (var rangeStart in document.EnumerateChildrenOfType<AnnotationRangeStart>())
    if (rangeStart.End == null || rangeStart.End.Parent == null || rangeStart.End.Parent.Parent == null)
        //MessageBox.Show("This indicates a problem.");

Note: Until 2017 R2 SP1 release StackOverflowException is thrown, after this release an ArgumentException should be thrown.
Last Updated: 22 Jul 2019 13:57 by ADMIN
Release R3 2019 (LIB 2019.2.729)

To reproduce:

Type a word and then change the font. The RichTextEditor is not focused. When you click in it the font is restored.

class MyRichtTextEditorRibbonbar : RichTextEditorRibbonBar
    public MyRichtTextEditorRibbonbar()
        this.dropDownListFont.PopupClosed += DropDownListFont_PopupClosed;

    private void DropDownListFont_PopupClosed(object sender, RadPopupClosedEventArgs args)



Last Updated: 01 Jul 2019 15:00 by ADMIN
Release R3 2019 (LIB 2019.2.708)
Created by: Tomasz
Comments: 6
Category: RichTextEditor
Type: Bug Report

1. Document created via MS-Word, Page orientation is set to Landscape. (MS-Word works OK)

2. Document read into Telerik RichTextEditor and print ignore Landscape settings.

3. Documet "Landscape.rtf" and snapshot in attachmet 

please help me 

Last Updated: 17 Jun 2019 14:19 by ADMIN
Release R2 2019 SP1
Hello Telerik, 

your control changed the format to Verdana when import rtf. But only in the first line. And only the first line is Arial. Is the first line with any other font formated, its all ok.

Here the code:

string rtfText = @"{\rtf1\ansi\ansicpg1252\deff0\deflang1031{\fonttbl{\f0\fnil\fcharset0 Arial;}{\f1\fnil\fcharset0 Tahoma;}{\f2\fnil\fcharset0 Times New Roman;}{\f3\fnil\fcharset0 Arial Unicode MS;}{\f4\fnil\fcharset0 Calibri;}}
{\colortbl ;\red0\green0\blue0;}
\viewkind4\uc1\pard\tx300\tx600\tx900\tx1200\tx1500\tx1800\tx2100\tx2400\tx2700\tx3000\tx3300\tx3600\tx3900\tx4200\tx4500\cf1\b\fs32 Arial\f1\par
\f2 Times New Roman\par
\f0 Arial\f2\par
\f3 Arial Unicode MS\par
\f4 Calibri\b0\f0\fs20\par
RtfFormatProvider rtf = new RtfFormatProvider();
this.radRichTextEditor1.Document = rtf.Import(rtfText);

this.richTextBox1.Rtf = rtfText;

In the screenshot you can see, left the standard .net rtf control and rigth the Telerik richtexteditor. 
The zip is the sample project.
Last Updated: 12 Jun 2019 13:58 by ADMIN

Please refer to the attached gif file.

Let's take for instance demo application with its default document, with text "RadRichTextEditor for WinForms" at the beginning in font Calibri of size 28. Suppose the user wants to add A, then empty line, then C in single line, followed by the rest of the document, and to have these three new lines in Times New Roman in size 10.

If there is no empty line, but letter B in middle line, then user can set caret to document start, set the font and size, and type A<Return>B<Return>C<Return>. And it would look fine (and even then, if we set caret just after B and press Return the new paragraph will have spacing after set to 7.5 for no apparent reason).

If we want an empty line instead of B in the line, then there is no simple way to do it. Typing A<Return><Return>C<Return> would produce a huge gap between A and C (we still first set the caret, and font and size). One way to accomplish what we want is to select all new text, set font size to something other than 10, and then back to 10 (which is also weird to have to do).

Last Updated: 06 Jun 2019 13:35 by ADMIN
Release R2 2019 SP1 (LIB 2019.2.610)
Last Updated: 31 May 2019 10:26 by ADMIN
Release R2 2019 SP1 (LIB 2019.2.603)
Created by: Mihajlo
Comments: 4
Category: RichTextEditor
Type: Bug Report

In R2 2019 RichTextEditor has a new GUI element, a toggle button named Simplified Ribbon. It looks neat, and I like it, but now I have to localize it. There is a link to a strings file on page , but I can't find the text "simplified ribbon" in that xml file.

My fallback plan is to download the whole Telerik source code, I'm just reminding you here to update the file. And to ask you to update the file together with Telerik update in the future.

Last Updated: 27 May 2019 11:40 by ADMIN
Release Fixed in R2 2019 (LIB 2019.2.603)
Last Updated: 27 May 2019 10:37 by ADMIN
Release Fixed in R2 2019 (2019.2.527)
Last Updated: 23 May 2019 13:19 by ADMIN
Release R2 2019 SP1 (LIB 2019.2.527)
Created by: Dess | Tech Support Engineer, Sr.
Comments: 0
Category: RichTextEditor
Type: Bug Report
To reproduce: run the Demo application >> RichTextEditor >> First Look example and follow the steps illustrated in the attached gif file. 

1. First add a footnote in the text
2. Than select a part of the footnote text or all text and use the context menu to cut the text
3. Then,  paste the text in the document, it doesn't matter were.
4. Next step is to remove the footnote reference.
5.Then, scroll through the document and press the right mouse button to open the context menu.

The object release should have been called and the context menu is disposed. If so the error occurs.


this.radRichTextEditor1.MouseClick += radRichTextEditor1_MouseClick;

        private void radRichTextEditor1_MouseClick(object sender, MouseEventArgs e)
            if (e.Button == System.Windows.Forms.MouseButtons.Right)
                if (this.radRichTextEditor1.RichTextBoxElement.ContextMenu != null)
                    FieldInfo fi = typeof(Telerik.WinControls.RichTextEditor.UI.ContextMenu).GetField("radDropDownMenu", BindingFlags.Instance | BindingFlags.NonPublic);
                    RadDropDownMenu dropdown = fi.GetValue(this.radRichTextEditor1.RichTextBoxElement.ContextMenu) as RadDropDownMenu;
                    if (dropdown.IsDisposed)
                        this.radRichTextEditor1.RichTextBoxElement.ContextMenu = new Telerik.WinControls.RichTextEditor.UI.ContextMenu();
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