Treeview nodes in windows forms

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hello experts,

I have a window forms application where there are already treeview designed.
But I want to add a Node and child to that nodes based on condition.
That Node should be on the TOP of all the existing nodes designed in designer.

This is what I have tried but the nodes are being added to the frst node already in designer .

For example My existing Nodes are like

C#

Node1
 Node1 child 1 
 Node 1 Child 2

Node2 
 Node 2 Child 1 
continues

Now My code does below

C#

Node1
 Node1 child1 
 Node1 child2 
 Top Node
 A
 B
 C
Node 2
 Node 2 child1

However I am looking for something like below

C#

Top Node
 A
 B
 C
Node 1 
 Node 1 Child 1
 Node 1 Child 2 
Node 2 
 Node 2 child 1 
continues

Could someone please help me

What I have tried:

If TreeView1.Nodes.Count > 0 Then
TreeView1.Nodes(0).Nodes.Insert(0, "TopNode")

TreeView1.Nodes(0).Nodes.Add("A")
TreeView1.Nodes(0).Nodes.Add("B")
TreeView1.Nodes(0).Nodes.Add("C")
End if

Posted 31-Mar-16 5:50am

sudevsu

Updated 31-Mar-16 6:01am

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Dave Kreskowiak · Answer 1 · 2016-03-31T06:01:00

You don't Insert your TopNode in the Nodes collection of one of the other nodes.

You have to iterate through the TreeView Nodes collection and add those Nodes to the Node collection of your TopNode. You then have to remove those nodes from the TreeView Nodes collection and add back your TopNode to the TreeView Nodes collection. Your TopNode will be the only node in the TreeView Nodes collection. Everything else will hang off of your TopNode.