ServerSideCallBack & ExpandDepth

[richard]

Hi,

I am using ServerSideCallBack and would like nodes to be expanded to say two levels.
Is there a way I can emulate the asp TreeView ExpandDepth property on load.

I have tried setting node.Expanded but this doesn't seem to trigger the populate on demand.

Many thanks

Richard

[Bozhidar]

Hello Richard,

You can check the level of the node you are expanding in the NodeExpand event. Then based on the level you can choose whether to add child items or not. Here is a small example:

protected void RadTreeView1_NodeExpand(object sender, Telerik.Web.UI.RadTreeNodeEventArgs e)
{
    if (e.Node.Level < 2)
    {
        RadTreeNode node = new RadTreeNode();
        node.Text = "child";
        node.Value = "value";
        node.ExpandMode = TreeNodeExpandMode.ServerSideCallBack;
        e.Node.Nodes.Add(node);
    }
}

Regards,
Bozhidar
the Telerik team