mauro_sturaro said:

Hi,

  we noticed a severe issue of memory leak using a binded UltraWinTree; our tree is binded to a collection of classes: we fill in and empty this collection but when this collection is empty, classes previously showed in the tree (and then disposed) remain alive. It seems that the tree element stores a pointer to the classes inside an internal field named nodeClientAreaUIElement

Note : we don't have to dispose the tree until the program is closed because its possible to refill the collection more times.

In attach a little sample reproducing our issue.

Is there a solution to avoid this issue? Will it be fixed in the future releases ?

(issue found on release 11.1)

Best regards

Tomorrow I'll check to make sure this bug was entered into the system so it gets fixed and enter it if necessary. As a possible work around until the release that fixes the bug, you could do something as below to kill off the memory reference for garbage collection.

private void btClear_Click(object sender, EventArgs e) {
    ultraTree1.SelectedNodes.Clear();
    _Source.Clear();

    if (ultraTree1.UIElement != null)
    {
        if (ultraTree1.UIElement.ChildElements.Count > 0)
        {
            if (ultraTree1.UIElement.ChildElements[0] is Infragistics.Win.UltraWinTree.NodeClientAreaUIElement)
            {
                ultraTree1.UIElement.ChildElements[0].Dispose();
                ultraTree1.UIElement.ChildElements.Add(new Infragistics.Win.UltraWinTree.NodeClientAreaUIElement(ultraTree1.UIElement));
            }
        }
    }
}