Devexpress treelist1/3/2023 ![]() The children of root nodes reside at a level of 1, their children reside at a level of 2 and so on. They do not have parents and thus their TreeListNode.ParentNode property returns null ( Nothing in Visual Basic). These nodes are located at the zero level of the hierarchy (their TreeListNode.Level property returns 0). The TreeList.Nodes property maintains a collection of root nodes. Every node can have child nodes stored in the TreeListNode.Nodes collection. Tree List nodes are organized in a hierarchical structure using parent-child relationships. TreeListNodesIterator.GetPrevVisible(TreeListNode).TreeListNodesIterator.GetNextVisible(TreeListNode). ![]()
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