Question

I can’t get the parent node of “current_node” deleted from my Tree. Here is what I am trying:
I am developing in C# .NET for VSTO

TreeGridNode current_node = myTreeGrid.CurrentNode;
TreeGridNode parent_node = myTreeGrid.CurrentNode.Parent;
// this works
myTreeGrid.Nodes.Remove(current_node);

if (parent_node.Nodes.Count == 0) {
    // it never gets here, it doesn't detect that the lats child was just removed above
    myTreeGrid.Nodes.Remove(parent_node);
}

using this custom structure
http://blogs.msdn.com/b/markrideout/archive/2006/01/08/510700.aspx

Answer 1

I believe that your problem here is that you are trying to remove current_node from myTreeGrid and not current_node‘s parent. myTreeGrid.Nodes does not contain a reference to current_node, so calling myTreeGrid.Nodes.Remove(current_node) essentially does nothing.

Since nothing is ever removed, parent_node.Nodes still contains the reference to current_node. Try removing current_node directly from parent_node.Nodes and your issue will probably be resolved:

Change:

myTreeGrid.Nodes.Remove(current_node);

to

parent_node.Nodes.Remove(current_node);