This tutorial shows how to configure a tree view at design time, and then apply the PopulateOnDemand feature to the tree items. When the user clicks the items, the nested items are loaded from the server to the client using callbacks.

This tutorial also shows how to assign urls to individual tree items using the NavigateUrl property and how to assign custom images to the ImageUrl property at design time.

Step 1: Set up the First Group of Tree Items

Step 2: Set up the Second Group of Tree Items

Step 3: Set up the Third Group of Tree Items