Adding, deleting and disabling tree nodes at runtime can be achieved with only a few lines of code. In this example, we take advantage of the NodeClick server-side event. When the event is fired we check the text of the parent of the clicked node and, depending on the parent text ("Add", "Delete", or "Disable"), we perform the corresponding action.

All child nodes for a particular RadTreeView/RadTreeNode are stored in a Nodes collection of type RadTreeNodeCollection. Adding nodes at runtime can be achieved using the AddNode(RadTreeNode node) method of the RadTreeNode and RadTreeView class, or by directly adding the node to the Nodes collection of the respective parent.

You can delete nodes by using the Remove method of the Nodes collection.

Disabling/Enabling nodes can be achieved by using the Enabled property of each RadTreeNode.