So close: how to add this child node to a treeview?

[tryingtolearn]

Hello,
This should be fairly simple, I think I am close. I have a custom object called "response", which I created a list of:

[COLOR=blue]public[/COLOR] [COLOR=#2b91af]List[/COLOR]<[COLOR=#2b91af]response[/COLOR]> lstResponses = [COLOR=blue]new[/COLOR] [COLOR=#2b91af]List[/COLOR]<[COLOR=#2b91af]response[/COLOR]>();

Each "response" object in the lstResponses has two properties: Key and Name. Because there may be two objects in the list with the same key, I decided to group them like so:

[COLOR=blue]var[/COLOR] groupedResponses = lstResponses
         .GroupBy(u => u.key)
         .Select(grp => grp.ToList())
         .ToList();

So far, so good. But I need help getting the above into a treeview. This is what I have:

[COLOR=blue]foreach[/COLOR] ([COLOR=blue]var[/COLOR] root [COLOR=blue]in[/COLOR] groupedResponses)
{
   //Add ROOT to treeview
    [COLOR=#2b91af]TreeNode[/COLOR] key = [COLOR=blue]new[/COLOR] [COLOR=#2b91af]TreeNode[/COLOR](root[0].key);
    treeResponses.Nodes.Add(key);
 
  
    [COLOR=blue]for[/COLOR] ([COLOR=blue]int[/COLOR] i = 0; i < root.Count; i++)
    {
       childToAdd=root[i].Name;

     // How [COLOR=blue]do[/COLOR] i add the child node here?
 
    }
 
 
    
}

That second for loop is where I am stuck. I don't know trees enough to know how to add the child.

Thanks in advance,
Rob

 

[JohnH]

TreeNodeCollection.Add Method (String) (System.Windows.Forms)
As you can see Add method returns the new TreeNode, which you add the child nodes to. Each Treenode has its own Nodes collection.

 

[tryingtolearn]

TreeNodeCollection.Add Method (String) (System.Windows.Forms)
As you can see Add method returns the new TreeNode, which you add the child nodes to. Each Treenode has its own Nodes collection.

Thank you John! You've been essential to helping me develop this program.