Treeview iteration

[User 9285131]

I have a tree created at design time with 3 root nodes and 3 levels 3x3x3 =39 nodes as the default.

The nodes can be dynamically recreated.

When I cleared the nodes then recreated them, I tried looping through to add properties to the nodes of each level including their relevant context menu name.

Private Sub RedoTree\_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles RedoTree.Click

	treeLoad()
	treeExecutive.ExpandAll()
	restoreTP()
	treeExecutive.Nodes(0).EnsureVisible()

End Sub

Sub restoreTP() '				renew treenode properties

	Dim s As String, l As Short

	treeExecutive.Update()

	For Each treenode In treeExecutive.Nodes
		s = treenode.Name
		l = Len(s)
		treenode.ForeColor = Color.GhostWhite

		If treenode.Text <> s Then treenode.ForeColor = Color.Black

		Select Case l
			Case 1
				treenode.NodeFont = New Font("Arial Rounded MT Bold", 10.8)
				treenode.ContextMenuStrip = CMSRoot
			Case 2
				treenode.NodeFont = New Font("Arial", 10.2)
				treenode.ContextMenuStrip = CMSTree
			Case Else
				treenode.NodeFont = New Font("Arial Narrow", 9)
				treenode.ContextMenuStrip = CMSTree
		End Select

	Next

End Sub

The root nodes are number 1-3, then 11,12,13 .... 111,112,113 Total is 39 nodes

ONLY THE ROOT NODES ARE RECOGNISED AND DEALT WITH.

All the child nodes are ignored as if they don't exist

Am bogged down on this and would appreciate any help :confused:

Demac

[Richard Deeming]

The TreeView's Nodes property[^] only returns the root nodes. Each node has its own Nodes property[^] containing its child nodes. To iterate through all nodes in the tree, you will need a recursive method. For example:

Sub restoreTP()
treeExecutive.BeginUpdate()
Try
restoreTP(treeExecutive.Nodes)
Finally
treeExecutive.EndUpdate()
End Try
End Sub

Sub restoreTP(ByVal nodes As TreeNodeCollection)
Dim s As String, l As Integer
For Each treenode As TreeNode in nodes
...

    restoreTP(treenode.Nodes)
Next

End Sub

---

"These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

[User 9285131]

Hi thx Richard for that info Not familiar with recursion, but now you've helped me improve my understanding of treeviews. I did circumvent the problem by updating node properties as they are created. I can post that code if it might help others. demac ;)