Last Updated: 28 May 2021 09:03 by ADMIN
Release LIB 2021.2.531 (31/05/2021)
 Extremely bad selection performance with large numbers of items (above 10K).
Last Updated: 20 May 2021 10:23 by ADMIN
Release LIB 2021.2.525 (25/05/2021)
The IsSynchronizedWithCurrentItem property works only in the Single SelectionMode. With the other two modes, the synchronization works partially - only initially. Changes in the control's selection doesn't update the CurrentItem of the associated collection view.
Last Updated: 12 Jan 2021 11:48 by ADMIN
The ScrollIntoView method of RadListBox doesn't work when the VirtualizingPanel.ScrollUnit property is set to Pixel and the ItemsPanel of the control is VirtualizingWrapPanel.
Last Updated: 08 Jan 2021 13:48 by ADMIN
Release LIB 2020.3.1311 (1/11/2021)
In this particular case, the RadListBox is placed inside RadBusyIndicator. When we set the DragDropManager.UseAdornerLayer static property to true, drop functionality is restricted. A possible workaround here is to avoid using RadListBox as a content of RadBusyIndicator
Last Updated: 02 Nov 2020 11:48 by ADMIN
Release R3 2020 SP1

In this particular scenario, the RadListBox is placed inside DataTemplate and its ItemsSource property is bound to CollectionViewSource.View. Now when we try to bind the SelectedItem property, the binding fails. The reason behind this is that when the RadListBox is loading, the CurrentItem of the CollectionViewSource is set to the SelectedItem property after the binding kicks in. Which will break the binding. To workaround this we can set the CurrentItem to Null.


Last Updated: 30 Oct 2020 16:15 by ADMIN
Release R3 2020 SP1
If you create a class implementing ListBoxDragDropBehavior and override the CoerceDraggedItems method, the return value is not utilized. 
Last Updated: 07 Oct 2020 09:37 by ADMIN
Introduce property to control the visibility of the drop visual when the drop is not allowed. For example, when the AllowReorder property is False and the user tries to reorder rows.
Last Updated: 30 Sep 2020 10:57 by ADMIN
Release LIB 2020.3.1005 (10/05/2020)

The border of the RadListBox is missing in the Office2019 theme if System.Windows.xaml resource dictionary is not merged.

Last Updated: 17 Mar 2020 06:22 by ADMIN
Release LIB 2020.1.323 (03/23/2020)
The selected item is scrolled out of view if the ItemsSource is changed during runtime and IsScrollIntoViewEnabled is True.
Last Updated: 01 Nov 2019 14:52 by ADMIN
Release LIB 2019.3.1104

If you set the SelectedIndex after an item is added in the Items or ItemsSource of RadListBox, the selection doesn't work. 

To work this around, use the SelectedItem property instead of SelectedIndex.

Last Updated: 16 Jul 2019 13:46 by ADMIN
Release LIB 2019.2.722 (7/22/2019)
This behavior is also reproduced in RadFileDialogs in the FileBrowserListBox which inherits RadListBox.

As a workaround you can set the IsScrollIntoViewEnabled property of the RadListBox to false
Last Updated: 03 Jul 2019 13:21 by ADMIN
Release LIB 2019.2.708 (7/8/2019)
If you host a RadMaskedTextInput control in the listbox items and focus the input, then pressing Space will send the focus to the corresponding RadListBoxItem instead of adding an empty space character into the text input.

To work this around, create a custom RadListBox control and override its HandleKeyboardInput method.
public class CustomListBox : RadListBox
    protected override bool HandleKeyboardInput(Key key)
        if (key == Key.Space)
            return false;
        return base.HandleKeyboardInput(key);
Last Updated: 12 Mar 2019 09:42 by ADMIN
Last Updated: 07 Dec 2018 13:53 by ADMIN
Created by: Stefan
Comments: 0
Category: ListBox
Type: Feature Request
Last Updated: 06 Dec 2018 09:42 by ADMIN
ArgumentOutOfRangeException is thrown when calling the ScrollIntoView method with an invalid index and the control is grouped.

Scheduled for:
The fix for this issue will be available with LIB (version 2018.3.1210) scheduled for publishing on Monday, 10th December 2018.
Last Updated: 11 Jun 2018 13:59 by ADMIN
SelectionChanging event could be added for preventing selection in code, just like SelectionChanging event in RadGridView and PreviewSelectionChanged in RadTreeView
Last Updated: 07 Jun 2018 06:35 by ADMIN
Last Updated: 07 Jun 2018 06:33 by ADMIN
Last Updated: 28 Mar 2018 11:57 by ADMIN
The issue can be reproduced in a scenario in which there are a RadListBox and a RadGridView defined and their SelectedItem properties are bound to the same property in the view model. The source collection of RadListBox contains some objects present in the one bound to RadGridView's ItemsSource. If the user selects an item in RadGridView that is also present in the items of RadListBox, the selection is performed in both controls as expected. However, when already having a selected item in both controls, if the user selects an item in RadGridView that is not present in the items of RadListBox, the selection in RadListBox is not cleared. Thus, in order to selected the previously selected item, it needs to be deselected and selected again.

After the researching the issue, it seems that the logic for handling the case when a SelectedItem that is not present in the source collection is being set is slightly different for Silverlight and WPF. For the WPF version of the control a DependencyProperty.UnsetValue is used, whereas a null value is set for the Silverlight RadListBox. Thus, in Silverlight the selection is cleared and in WPF it is not. I am afraid, that we cannot commit ourselves to modifying this by-design implementation, as this will result in a braking change. With this in mind, I will update the status of the logged bug to Declined.

What we can suggest as a workaround, would be to define a second calculated property in the view model and bind the SelectedItem of RadListBox to it. The logic in the property setter would be to set a null value if the SelectedItem is not present in the source collection of RadListBox.
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