TreeListView.ExpandAllHierarchyItems() problem

[Max]

I'd like to expand all TreeListView nodes when the data is loaded. I tried to use DataLoaded event for it but got a problem. After calling ExpandAllHierarchyItems() in DataLoaded event handler, this event fires again and app goes into infinite loop. How can I handle with it? Note: I need expanded tree after each data update, not only once.

[Milan]

Hello Max,

You could try something like this:

public MainPage()
{
    InitializeComponent();
    this.RadTreeListView1.DataLoaded += new EventHandler<EventArgs>(RadTreeListView1_DataLoaded);
}

bool isExpanding = false;

void RadTreeListView1_DataLoaded(object sender, EventArgs e)
{
    if (this.isExpanding)
    {
        return;
    }

    this.isExpanding = true;
    this.RadTreeListView1.ExpandAllHierarchyItems();
    this.isExpanding = false;
}

Hope this helps.

Greetings,
Milan
the Telerik team

[Max]

With this solution tree is always expanded and it's impossible to shrink any of it's nodes. Somehow DataLoaded event occurs not only in case of data loading but also when clicking a "triangle" to shrink the node.

[Milan]

Hello Max,

You could try adding the following line to the event handler:

// usubscribe
this.RadTreeListView1.DataLoaded -= new EventHandler<EventArgs>(RadTreeListView1_DataLoaded);

All the best,
Milan
the Telerik team

[Max]

Hello Milan

Stilll no acceptable solution for this issue. Unsubscribe from the event isn't a good way. As I said in the first post I need expanded tree not once, but every time the data is loaded.

[Max]

Is it possible to keep TreeListView always expanded and with actual data without constant management of it's internals?