[Solved] RadTreeView javascript to see if node may have children

[Jay]

I am using a RadTreeView with TreeNodeExpandMode.ServerSideCallBack (an AJAX call fills in the tree entries when the plus is clicked. For each RadTreeNode, you can specifiy an ExpandMode of TreeNodeExpandMode.ServerSideCallBack to make the plus show up. Or leave it so that no plus shows up.

In client Javascript (from the OnClientNodeClicking callback), how do I tell if there are any "possible" children (if the plus is visisble)? The children are not yet filled in -- I call node.expand() to expand the node when clicked.

Thanks

[Nikolay]

Hello Jay,

You can get the ExpandMode of a node, like:

var tree = $find("<%=RadTreeView1.ClientID %>");
var firstNode = tree.get_nodes().getNode(0);
if(firstNode.get_expandMode()==2)
  alert("this node is supposed to have child nodes");

If the get_expandMode() method returns 2, then the ExpandMode of the node has been set to ServerSideCallback. Hence, the node is supposed to have child nodes.

Hope this helps.

Regards,
Nick
the Telerik team

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[Jay]

Perfect!

Thanks!