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How to Customize the RichTextEditor's Context Menu items


Product Version Product Author
2022.2.622 RadRichTextEditor for WinForms Desislava Yordanova


RadRichTextEditor internally uses a ContextMenuContentBuilder which is responsible for populating the menu items according to the currently selected element in the document.

The following article demonstrates a sample approach how to eliminate the last two groups of context menu items for a selected image, e.g. Edit Image, Insert Caption, Text Wrapping:

Default context menu for an image element

customize-richtexteditor-context-menu 001


Create a custom ContextMenuContentBuilder. It allows overriding multiple methods that are responsible for creating and populating the different groups of items according to the document element they are related to:

  • CreateImageCommands - Creates the image commands menu items.
  • CreateListCommands - Creates the list commands menu items.
  • CreateFloatingBlockCommands - Creates the floating block commands menu items.
  • CreateFieldCommands - Creates the field commands menu items.
  • CreateTableCommands - Creates the table commands menu items.
  • CreateTextEditCommands - Creates the text edit commands menu items.
  • CreateHyperlinkCommands - Creates the hyperlink commands menu items.
  • CreateSpellCheckingSuggestions - Creates the spell checking suggestions menu items.
  • CreateClipboardCommands - Creates the clipboard commands menu items (cut, copy, paste, etc.).
  • CreateHeaderFooterCommands - Creates the headers/footers commands.
  • CreateTrackChangesCommands - Creates the track changes commands menu items (accept, reject, etc.).
  • CreateCodeBlockCommands - Creates the code block commands menu items.

For the image element example, we will override the CreateImageCommands and CreateFloatingBlockCommands methods

customize-richtexteditor-context-menu 002

public RadForm1()

    Telerik.WinControls.RichTextEditor.UI.ContextMenu contextMenu = (Telerik.WinControls.RichTextEditor.UI.ContextMenu)this.radRichTextEditor1.RichTextBoxElement.ContextMenu;
    contextMenu.ContentBuilder = new CustomContextMenuContentBuilder();

public class CustomContextMenuContentBuilder : ContextMenuContentBuilder
    protected override ContextMenuGroup CreateImageCommands()
        //return base.CreateImageCommands();
        return null;

    protected override ContextMenuGroup CreateFloatingBlockCommands()
        //return base.CreateFloatingBlockCommands();
        return null;

Public Sub New()
    Dim contextMenu As Telerik.WinControls.RichTextEditor.UI.ContextMenu = CType(Me.RadRichTextEditor1.RichTextBoxElement.ContextMenu, Telerik.WinControls.RichTextEditor.UI.ContextMenu)
    contextMenu.ContentBuilder = New CustomContextMenuContentBuilder()
End Sub

Public Class CustomContextMenuContentBuilder
    Inherits Telerik.WinForms.RichTextEditor.RichTextBoxUI.Menus.ContextMenuContentBuilder

    Protected Overrides Function CreateImageCommands() As ContextMenuGroup
        Return Nothing
    End Function

    Protected Overrides Function CreateFloatingBlockCommands() As ContextMenuGroup
        Return Nothing
    End Function
End Class

Make sure that you added using for C# and imports for VB Telerik.WinForms.RichTextEditor.RichTextBoxUI.Menus.

See Also

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