select nodes of a treeview by code

[Guest]

Hi NG,
I have two treeviews on my form with exactly the same structure, but with
different nodes.
How can I select the same node or index within the second treeview when
selecting a node in the first treeview?

Thanks for answering

Werner

 

[Daniel Moth]

Look at SelectedNode property and the EnsureVisible method, Index property.
You may also find the Nodes property and IndexOf method useful.

In general, use msdn:
http://msdn.microsoft.com/library/d...frlrfsystemwindowsformstreeviewclasstopic.asp

Cheers
Daniel

 

[Mark Erikson]

Hi NG,
I have two treeviews on my form with exactly the same structure, but with
different nodes.
How can I select the same node or index within the second treeview when
selecting a node in the first treeview?

Thanks for answering

Werner

Try working your way up the hierarchy, checking for the index of each
TreeNode as you go. Save those indices, then use them to find the
equivalent node in the other treeview. Here's some (untested) C# code
that should get you close:

public TreeNode GetFraternalTwinNode()
{
TreeNode startingNode = treeView1.SelectedNode;
TreeNode currentNode1 = startingNode;
ArrayList indices = new ArrayList();

// Save the indices of all the starting node's ancestors,
// in ascending order
while(currentNode1.Parent != null)
{
indices.Add(currentNode1.Index);
currentNode1 = currentNode1.Parent;
}

// Switch the indices into descending order
indices.Reverse();

// Get the index of the topmost ancestor
int topmostIndex = currentNode1.Index;

// Get the equivalent of the topmost ancestor
TreeNode currentNode2 = treeView2.Nodes[topmostIndex];

// Descend the hierarchy to the equivalent of the starting node
for(int i = 0; i < indices.Count; i++)
{
int currentIndex = (int)indices;
currentNode2 = currentNode2.Nodes[currentIndex];
}

TreeNode finalNode = currentNode2;

return finalNode;
}

Hope this helps!

Mark Erikson
http://www.isquaredsoftware.com