BringPathIntoView Not Working With ExpandAll

[Scott Michetti]

Hello,

after I load the tree I want to expand all items, then call BringPathIntoView(). This does not work. If I do not call ExpandAll(), BringPathIntoView will select the correct item. My requirement is that I expand the whole tree and select a specific item based on certain rules. Here's my code:

 radTreeView.ItemsSource = _radTreeViewItems;

radTreeView.ExpandAll();

radTreeView.BringPathIntoView("something\\somethingChild");

 

The "something\\somethingChild" path is an item near the bottom of a large tree and it does not scroll down. Is there a way to wait for the ExpandAll() method to finish, then call BringPathIntoView?

 

Thanks,

Scott

[Dinko | Tech Support Engineer]

Hello Scott,

In order to achieve the desire effect you can call ExpandAll() method in the constructor in the MainPage constructor then you can call BringPathIntoView() method in the event handler of the  TreeView Loaded event.

public MainPage()
{
    InitializeComponent();
    myTreeView.ExpandAll();
    myTreeView.Loaded += myTreeView_Loaded;
}
private void myTreeView_Loaded(object sender, RoutedEventArgs e)
{
    // example path
    string path = "0\\0.3\\0.3.0\\0.3.0.1";

    Dispatcher.BeginInvoke(new Action(() =>
    {
        myTreeView.BringPathIntoView(path);
    }), DispatcherPriority.Background);
}

To make this work properly you will need to call the BringPathIntoView() method into a Dispatcher with its DispatcherPriority set to Background.

If this solution is not the answer you are looking for don't hesitate to contact us.

Regards,
Dinko
Telerik

[Scott Michetti]

Thanks Dinko,

that helped.