Getting all visible Nodes from Infragistics UltraTree

Question

I have 1 root node and many child nodes of that root node.

I want to get all of the visible nodes key.

The recursive code block like below;

public void PrintNodesRecursive(UltraTreeNode oParentNode)
{  
    foreach (UltraTreeNode oSubNode in ultraTree1.Nodes[0].Nodes)
    {
        MessageBox.Show(oSubNode.Key.ToString());
        PrintNodesRecursive(oSubNode);
    }             
}

private void ultraButton3_Click(object sender, EventArgs e)
{
    PrintNodesRecursive(ultraTree1.Nodes[0]);
}

However messagebox always show me '1' value. It doesn't count and endless loop happens.

How can I make it happen?

lucky · Accepted Answer · 2017-12-16T13:29:26.527

1

Try like this;

    public void PrintNodesRecursive(UltraTreeNode oParentNode)
    {
        if (oParentNode.Nodes.Length == 0)
        {
            return;
        }
        foreach (UltraTreeNode oSubNode in oParentNode.Nodes)
        {
            if(oSubNode.Visible)
            {
                MessageBox.Show(oSubNode.Key.ToString());
            }
            PrintNodesRecursive(oSubNode);
        }
    }

Also, put the visible condition in the loop.

edited Dec 16 '17 at 13:29

answered Dec 16 '17 at 13:20

lucky

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The extra length check is unnecessary. `foreach` on an empty collection is a no-op anyways. – Heinzi Dec 16 '17 at 13:22
You are right, I put that logic because of provide better understanding. – lucky Dec 16 '17 at 13:23
Thank you, this works too. however it shows me all nodes/subnodes not only visible ones. What can we do about it ? – john true Dec 16 '17 at 13:37
I put the "oSubNode.Visible" logic in the loop. – lucky Dec 16 '17 at 13:37
@Rainman yes, i tried with that. however, still getting all nodes. – john true Dec 16 '17 at 13:39
So, All of the nodes might be visible ? – lucky Dec 16 '17 at 13:40
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/161362/discussion-between-john-true-and-rainman). – john true Dec 16 '17 at 13:42

score 1 · Answer 2 · answered Dec 16 '17 at 13:21

1

You made a simple programming error. This line:

foreach (UltraTreeNode oSubNode in ultraTree1.Nodes[0].Nodes)

should probably be

foreach (UltraTreeNode oSubNode in oParentNode.Nodes)

Otherwise, every recursion step starts again from the top.

answered Dec 16 '17 at 13:21

Heinzi

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Getting all visible Nodes from Infragistics UltraTree

2 Answers2