Adding childs to a treenode dynamically in c#

Question

I want to dynamically add some child nodes to a root node in my TreeView. I have a string Array of some names like {"john", "sean", "edwin"} but it can be bigger or smaller.

I have a root like this:

        //Main Node (root)
        string newNodeText = "Family 1"
        TreeNode mainNode = new TreeNode(newNodeText, new TreeNode[] { /*HOW TO ADD DYNAMIC CHILDREN FROM ARRAY HERE?!?*/ });
        mainNode.Name = "root";
        mainNode.Tag = "Family 1;

and I am trying to do like this with my array of children's names:

        foreach (string item in xml.GetTestNames()) //xml.GetTestNames will return a string array of childs
        {
            TreeNode child = new TreeNode();

            child.Name = item;
            child.Text = item;
            child.Tag = "Child";
            child.NodeFont = new Font(listView1.Font, FontStyle.Regular);
        }

But obviously it is not working. HINT: I have the number of elements in my children array!!!!

EDIT 1:

I am trying to do:

        //Make childs
        TreeNode[] tree = new TreeNode[xml.GetTestsNumber()];
        int i = 0;

        foreach (string item in xml.GetTestNames())
        {
            textBox1.AppendText(item);
            tree[i].Name = item;
            tree[i].Text = item;
            tree[i].Tag = "Child";
            tree[i].NodeFont = new Font(listView1.Font, FontStyle.Regular);

            i++;
        }

        //Main Node (root)
        string newNodeText = xml.FileInfo("fileDeviceName") + " [" + fileName + "]"; //Text of a root node will have name of device also
        TreeNode mainNode = new TreeNode(newNodeText, tree);
        mainNode.Name = "root";
        mainNode.Tag = pathToFile;


        //Add the main node and its child to treeView
        treeViewFiles.Nodes.AddRange(new TreeNode[] { mainNode });

But this will add nothing to my treeView.

Philippe Lavoie · Accepted Answer · 2011-12-08 18:40:42Z

16

You need to append the child node to the parent, here's an example:

TreeView myTreeView = new TreeView();
myTreeView.Nodes.Clear();
foreach (string parentText in xml.parent)
{
   TreeNode parent = new TreeNode();
   parent.Text = parentText;
   myTreeView.Nodes.Add(treeNodeDivisions);

   foreach (string childText in xml.child)
   {
      TreeNode child = new TreeNode();
      child.Text = childText;
      parent.Nodes.Add(child);
   }
}

edited Dec 8, 2011 at 18:40

Philippe Lavoie

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answered Mar 16, 2011 at 14:14

DNRN

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Comments

Andrei Pana · Accepted Answer · 2011-03-16 14:06:48Z

0

I think the problem is that you do not inform the mainNode that child is its children, something like: mainNode.Children.Add(child) (in the for block). You just create the child node, but you don't do anything with it for it to have any relation with the TreeView or with the mainNode.

answered Mar 16, 2011 at 14:06

Andrei Pana

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