In Development
Last Updated: 11 Oct 2021 12:28 by ADMIN
Per the thread at "" I have modified the IsExpandedRowBinding sample to recreate the problem. I modified the button to expand and collapse the first row. To reproduce the problem:

1. Expand the first row.
2. Scroll down so the first row is not visible but it's children are visible.
3. Press the button. The expected behavior is the first row should collapse but nothing happens.
4. Scroll up so the first row is visible. The first row collapses.
Last Updated: 24 Jun 2021 09:44 by ADMIN
If you move an item from one level to another into the tree, the indent of the corresponding row won't get updated. This is reproducible only if the new parent of the moved item is expanded, while the operation is executed.

Usually, this can be reproduced by calling the ExpandHierarchyItem() for the new parent item method just after the moving of the original item.

To resolve this you can delay the expanding of the item. Note that the expanding is executed manually by calling the ExpandHierarchyItem() method. So, you can use a dispatcher with a lower DispatcherPriority to delay this.

Or alternatively, you can collapse the item before expanding it (using the CollapseHierarchyItem() method).
Last Updated: 21 May 2021 06:39 by ADMIN
Release LIB 2021.2.525 (25/05/2021)
When the TreeListView lines are set to a column after a hidden one, they are not positioned correctly.
Last Updated: 19 Oct 2020 10:22 by ADMIN
Release R3 2020 SP1
Selecting a large number of items through the UI or programatically with the Select method when in Extended SelectionMode leads to a degraded performance. As a workaround the Multiple SelectionMode can be used instead.
Last Updated: 06 Oct 2020 05:46 by ADMIN
Release LIB 2020.3.1012 (10/12/2020)
When the IsExpandedBinding property is bound to a custom property, and we use it to collapse and expand specific items, the rows inside the control will disappear.
Last Updated: 27 Jul 2020 10:55 by ADMIN
Release LIB 2020.2.2707
In some scenarios the hierarchy expand button is not visible when the HierarchyColumnIndex and FrozenColumnCount are equal.
Last Updated: 03 Jul 2020 14:59 by ADMIN

An exception is thrown when you try to update the items source of RadTreeListView in an async method.

The following error is observed.
InvalidOperationException: The calling thread cannot access this object because a different thread owns it

To work this around ensure that only the main UI thread updates the item source.

Last Updated: 26 May 2020 08:34 by ADMIN
Release LIB 2020.2.525 (5/26/2020)
The Visibility of the DropPossibleIconElement inside the ControlTemplate of the TreeListViewDragCue is not collapsed when the drop is not possible in newer themes. 
Last Updated: 30 Mar 2020 04:37 by ADMIN
Release LIB 2020.1.330 (03/30/2020)
Last Updated: 18 Mar 2020 09:58 by ADMIN
Release LIB 2020.1.323 (03/23/2020)
The icon of the expand button seems truncated when the horizontal scrollbar is used.
Last Updated: 13 Mar 2020 09:44 by ADMIN
Release LIB 2020.1.316 (03/16/2020)

The selected rows of TreeListView are not returned when calling SelectionPattern.GetSelection method.

The problem can be reproduced with RadGridView as well.

Last Updated: 10 Mar 2020 12:15 by ADMIN
Release LIB 2020.1.316 (03/16/2020)
When expanding or collapsing an item fast, mouse over effect or expand/collapse appears on a different row. The row needs to be the recycled one. This means that you need to have more items in the viewport and scroll to the bottom for example.
Last Updated: 19 Feb 2020 15:35 by ADMIN
Release R1 2020 SP1
Last Updated: 20 Jan 2020 12:40 by ADMIN
Release LIB 2020.1.120

    I found a bug when use MergeCells in grid view and tree list view, I am the license account, my support is out of date,But I still want to feadback the bug to you , I make a vedio in attachment

When use in radtreelistview , I can not explict set the MergedCellsStyle, maybe MergedCellsStyleSelector also have the bug.I just try MergedCellsStyle.

Last Updated: 14 Jan 2020 16:31 by ADMIN
Release R1 2020
Created by: Martin Ivanov
Comments: 0
Category: TreeListView
Type: Bug Report

The JAWS screen reader cannot read the RadTreeListView and also its rows and cells.

This reproduces after the 2019.3.917 release.

To work this around create a custom RadTreeListViewAutomationPeer:

public class CustomTreeListView : RadTreeListView
	protected override AutomationPeer OnCreateAutomationPeer()
		return new CustomTreeListViewAutomationPeer(this);

public class CustomTreeListViewAutomationPeer : RadTreeListViewAutomationPeer
	public CustomTreeListViewAutomationPeer(RadTreeListView owner) 
		: base(owner)
		var methodInfo = typeof(RadTreeListViewAutomationPeer).GetMethod("GetItemPeers", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic);
		methodInfo.Invoke(this, null);

	protected override List<AutomationPeer> GetChildrenCore()
		var frameworkPeer = new FrameworkElementAutomationPeer((FrameworkElement)this.Owner);
		return frameworkPeer.GetChildren();

Last Updated: 04 Nov 2019 11:11 by ADMIN
Release LIB 2019.3.1104 (11/04/2019)
The behavior is reproducible when the TreeLines are visible and we have frozen columns. When the RadTreeListView is scrolled the TreeLines in the Frozen column is also scrolled.
Last Updated: 12 Jun 2019 15:05 by ADMIN
Release R2 2019 SP
Last Updated: 26 May 2019 20:23 by Buks
Last Updated: 14 Dec 2018 14:43 by ADMIN
Sometimes the cells from more than one row are copied even though the SelectionMode is Single. As a workaround, you can clear the SelectedCells collection of the control in the Copied event:

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