Problems getting ParentItem

[Weverton]

Hi,

I need to get the ParentItem of a RadTreeViewItem. I'm doing like this:

RadTreeViewItem node = new RadTreeViewItem {Header = "Parent Node"};
radTreeView.Items.Add(node);
RadTreeViewItem childNode = new RadTreeViewItem {Header = "Child Node"};
node.Items.Add(node);

However, if I try childNode.ParentItem I get a null value, and If try childNode.RootItem, I always get the node it self.

How can I get these both properties correctly??

Thanks,

Weverton

[Kiril Stanoev]

Hello Weverton,

The reason why you get null is because the items you add have not been prepared yet i.e. their parent property has not been set. To get the immediate parent of an item, you can use the following code snippet:

RadTreeViewItem parentItem = Telerik.Windows.Controls.ItemsControl.ItemsControlFromItemContainer(this.childNode) as RadTreeViewItem;

If you want to get the root item, you can use the above code in a recursive method:

private RadTreeViewItem GetRootItem(RadTreeViewItem item)
{
    RadTreeViewItem parentItem = Telerik.Windows.Controls.ItemsControl.ItemsControlFromItemContainer(item) as RadTreeViewItem;
    if (parentItem != null)
    {
        return this.GetRootItem(parentItem);
    }
    else
    {
        return item;
    }
}

I am attaching my test project for further reference. Have a look at it and let me know if you have additional questions.

Greetings,
Kiril Stanoev
the Telerik team

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