treeview tag modifying question

i have treeview nodes this: "foo (1234)", wish grant user rename nodes, nonetheless wholly foo part, but (1234). i initial attempted change node calm beforelabeledit this:

private vacant treeview1_beforelabeledit(object sender, nodelabelediteventargs e)
{
    e.node.text = "foo";
}

but i click node correct it, "foo (1234)" appears textbox.

okay, following let's try something else.

i set treeview1.labeledit false, following following:

private vacant treeview1_mouseclick(object sender, mouseeventargs e)
{
    (e.button == mousebuttons.left)
    {
        (treeview1.selectednode == treeview1.getnodeat(e.location))
        {
            treeview1.selectednode.text = "foo";
            treeview1.labeledit = true;
            treeview1.selectednode.beginedit();
        }
    }
}

and following afterlabeledit, i set labeledit behind false.

and speculation what? doesn't work either. changes node calm "foo" nonetheless correct textbox does appear.

any ideas?
thanks