Problem in TreeView that has nodes and report that it has'nt

Going through nodes in a TreeView is a good example where you can use recursion.

To do this, I would recommend using a dynamic-sized container for the data you want to retrieve from the nodes. (Or the nodes themselves) I'll leave it to you to assess what you want to store, this example uses an ArrayList.

In your calling code you would have something like:
ArrayList myNodes = new ArrayList();
findNodes(treeView1.Nodes, myNodes);
// myNodes should now contain all nodes and child, and grandchild (etc) nodes in the treeview.
...


private void findNodes(TreeNodeCollection nodes, ArrayList myNodes)
{
  foreach(TreeNode node in nodes)
  {
    myNodes.Add(node);
    if (node.HasChildren)
      findNodes(node.Nodes, myNodes);
  }
}

I need to save the tree in TreeNodeCollection

if (treeView1.HasChildren)

{

  myNodeCollection = treeView1.Nodes;

}

int myCount = myNodeCollection.Count;

// Create an Object array.

myArray = new Object[myCount];

// Copy the collection into an array.

myNodeCollection.CopyTo(myArray, 0);

treeView1.Nodes.Clear();

 

but the problem is that the collection gets only the root node, and If I pass the second node I get only the nodes on that level but not the sons