Moving treenode to specific index

Question

Hello people

I still consider myself rather noobish here, so bare with me...

I want to move a root (level 0) treenode up and down the same level. I have started out with this relatively easy bit of code that will move the selected treenode, including its childnodes, to the last index of the level:

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Dim nodetobemoved As TreeNode = TreeView1.SelectedNode.Clone
        TreeView1.SelectedNode.Remove()
        TreeView1.Nodes.Add(nodetobemoved)

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However, I cant seem to find a way to insert (.add) the nodetobemoved at a specific index of the level. Surely there must be a way?

Answer 1

Hi Ricky,

You can use the Insert method for that:

TreeView1.Nodes.Insert(index,treeNode)

http://msdn.microsoft.com/en-us/library/5w99w164(v=vs.110).aspx?cs-save-lang=1&cs-lang=vb#code-snippet-1

Hope this helps

Answer 2

Oh my God, I cant believe it's that simple :P   Many thanks, I can now simply make one "Move up"-button and one "Move down"-button with the following code:

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Dim location As Integer
        location = TreeView1.SelectedNode.Index

        Dim nodetobemoved As TreeNode = TreeView1.SelectedNode.Clone
        TreeView1.SelectedNode.Remove()

        TreeView1.Nodes.Insert(location - 1, nodetobemoved)

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Simply replace the "- 1" with "+ 1" for down and up respectively. I can easily enough make an IF-statement so that you can only move nodes on root level the way I want.

Would be awesome if I could also keep focus on the node after it being moved, but I'm sure that's a minor issue to solve :)

Again, many thanks!

Answer 3

Hi Ricky,

With the SelectedMode you can easily set the focus to a treenode:

TreeView1.SelectedNode = nodetobemoved 

Hope this helps

Answer 4

Continuing on this thread as it is highly related: how can you insert a node at a specific level? The .insert method only asks for index.

It seems that .insert always adds nodes on level 0...?

Answer 5

Continuing on this thread as it is highly related: how can you insert a node at a specific level? The .insert method only asks for index.

It seems that .insert always adds nodes on level 0...?

Ricky,

This is a whole different way to do all of the TreeView stuff, but you might want to consider it.

I have a class that I made to deal with these sorts of things. The following shows the methods (including what you're talking about that you want):

The code for the class is shown on a page of my website here.

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Still lost in code, just at a little higher level.

:-)

Answer 6

Hi Ricky,

You can also add child nodes to an existing node. Following code add a childnode to the selected node:

treeView1.SelectedNode.Nodes.Add("ChildNode");

Hope this helps