Treeview fun!

Hi,

I am trying to dynamically build a multi level tree view tree for data held in an SQL database. The database holds the node name and the parent name, this allows for a flexible number of levels to be stored.

The issue I'm having is translating the level structure to the treeview component. I can recursively query the database but I can't programatically select a treenode in order to add a level.
I have tried using:

Code:

---

treeView1.SelectedNode=treeView1.Nodes.Find("Node1", true)

---

or

Code:

---

Dim node As TreeNode() = TreeView1.Nodes.Find("<selected word>", True)
TreeView1.SelectedNode = node(0)

---

and every combination of that I can find in forums but each time nothing is found so the selectednode assignment fails.

Any points would be greatly appreciated!

I think I might have got it.

When adding the parent node to the treeview I was only adding the text and not the key. By specifiing the and the name:

Code:

---

parent="Top Level"
TreeView1.Nodes.Add(parent, parent)

---

Code:

---

Dim myNodes() As TreeNode = TreeView1.Nodes.Find(parent, True)
            If Not sqldatareader.Item(0) Is DBNull.Value Then

                myNodes(0).Nodes.Add(sqldatareader.Item(0).ToString, sqldatareader.Item(0).ToString)

            End If

---

This seems to now dynamically build the correct tree structure.

Quote:

---

Originally Posted by Mattpstanding

I think I might have got it.

When adding the parent node to the treeview I was only adding the text and not the key. By specifiing the and the name:

Code:

---

parent="Top Level"
TreeView1.Nodes.Add(parent, parent)

---

Code:

---

Dim myNodes() As TreeNode = TreeView1.Nodes.Find(parent, True)
            If Not sqldatareader.Item(0) Is DBNull.Value Then

                myNodes(0).Nodes.Add(sqldatareader.Item(0).ToString, sqldatareader.Item(0).ToString)

            End If

---

This seems to now dynamically build the correct tree structure.

---

You're right. That's how to do exactly what you asked. No trickery, simply a case of using a key on each node...