Tree node event handaling

Hello,

I am trying to execute my following code after click on treeview node "TreeView1_SelectedNodeChanged1"

===Code ===

protected void TreeView1_SelectedNodeChanged1(object sender, EventArgs e)

{

string s = TreeView1.SelectedNode.Value;

if (e.Node.Name == null) { return; }

lbTollName = (LinkButton)e.Item.FindControl("lbTollName");

if (lbTollName != null)

{

this.SetTrafficSummary(lbTollName.CommandArgument, lbTollName.Text, lbTollName.CommandName);

}

lbTollName = null;

}

I want to write above code in selectedNode change event