Description:
Is it possible to insert a node into the tree above/below a specific child node rather than just append it to the end of the child collection?
Answer:
Yes, this is possible. You should use two methods to do this:
A) Create a node via the TreeList.AppendNode method;
B) move the node to the desired index within its parent via the TreeList.SetNodeIndex method.
C#using DevExpress.XtraTreeList.Nodes;
TreeListNode parentNode = treeList1.Nodes[0];
// insert a new node as the first child within its parent
TreeListNode newNode = treeList1.AppendNode(new object[] {"New first child"}, parentNode);
treeList1.SetNodeIndex(newNode, 0);
Visual BasicImports DevExpress.XtraTreeList.Nodes
Dim parentNode As TreeListNode = treeList1.Nodes(0)
' insert a new node as the first child within its parent
Dim newNode As TreeListNode = treeList1.AppendNode(New Object() {"New first child"}, parentNode)
treeList1.SetNodeIndex(newNode, 0)
See Also:
How to reorder XtraTreeList nodes via drag-and-drop