TreeView

[Robert]

I'm writing how best to expand the root node of the TreeView control by default, on the page load - either with C# or with the properties of the RadTreeView;

rootNode.Expanded = true  - this code did not work as expected;

Thanks in advance for any insight; 

 

 

 

 

 

 

 

 

 

 

 

 

 

[Princy]

Hello Robert,

You can try the following code.

C#:

protected void Page_Load(object sender, EventArgs e)
{
 for (int i = 0; i < RadTreeView1.Nodes.Count; i++)
  {
   this.RadTreeView1.Nodes[i].Expanded = true;
  }
}

Thanks,
Princy.

[Kate]

Hello Robert,

If you need to expand a specific node of the RadTreeView control here is a very good help article that explains how this could be achieved on the server.:Tutorial: Finding Nodes. However, if you need to expand nodes on the client-side you can refer here for more detailed explanation how it could be done (first article is for single node and the second for the collection of nodes - in the middle of the topic you can find an example how to loop through the node collection):

http://www.telerik.com/help/aspnet-ajax/treeview-client-basics.html
http://www.telerik.com/help/aspnet-ajax/treeview-client-objects-radtreenode.html

Further, if you choose the client-side approach I would recommend that you use the 

OnClientLoad event and assign an event handled as described here.

Kind regards,
Kate
the Telerik team