RadControls for ASP.NET AJAX This article shows how to hide all TreeView Images - the Line Images, Plus and Minus signs. In this case Nodes are toggled by clicking on their text as the Minus and Plus Images are gone.
Line Images are hidden by setting the ShowLineImages property of the TreeView to false.
Plus and Minus Images are hidden with CSS:
CopyCSS
div.RadTreeView .rtMinus,
div.RadTreeView .rtPlus
{
display: none;
}
div.RadTreeView .rtTop,
div.RadTreeView .rtMid,
div.RadTreeView .rtBot
{
padding: 0;
}