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Override the ShowEditorCommand of RadPropertyGrid


Product Version 2022.2.621
Product RadPropertyGrid for WPF


How to replace the show editor command, executed when the modal editor of the PropertyGrid is used. The modal editor is used when the EditorAttribute is used with EditorType set to Modal.


To replace the default action executed on modal editor button click, override the behavior of the Telerik's ModalEditor.ShowEditorCommand.

static MainWindow() 
    CommandManager.RegisterClassCommandBinding(typeof(RadButton), new CommandBinding(ModalEditor.ShowEditorCommand, ShowEditorExecuted, CanShowEditorExecute)); 
private static void CanShowEditorExecute(object sender, CanExecuteRoutedEventArgs e) 
    e.CanExecute = true; 
    e.Handled = true; 
private static void ShowEditorExecuted(object sender, ExecutedRoutedEventArgs e) 
    var button = (RadButton)sender; 
    var modalEditor = button.ParentOfType<ModalEditor>(); 
    if (modalEditor != null) 
        // here you can execute a custom action, like opening of custom dialog 
        var window = new Window() 
            DataContext = modalEditor.DataContext, 
            Content = modalEditor.Editor, 
            SizeToContent = SizeToContent.WidthAndHeight, 
            Owner = Application.Current.MainWindow, 
            WindowStartupLocation = modalEditor.WindowStartupLocation, 
            Top = modalEditor.WindowTop, 
            Left = modalEditor.WindowLeft 
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