asked on

Adding children to a treeview after the main nodes are created

Is there a way to add children to the main nodes after the main nodes are already in the treeview? For instance the treeview looks like this upon load:

1
2
3
4
5

On a button click, I want to add children to certain nodes:

1
2
1
2
3
4
1
5

Is there a way?

ASKER CERTIFIED SOLUTION

RonaldBiemans

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

Mike Tomlinson

Here are two different examples. The first adds two children to the currently selected node. The second add two children to the 5th node.

Public Class Form1
Inherits System.Windows.Forms.Form

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim i As Integer
For i = 1 To 10
TreeView1.Nodes.Add("Node" & i)
Next
End Sub

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim curNode As TreeNode = TreeView1.SelectedNode ' get currently selected node
If Not (curNode Is Nothing) Then
Dim i As Integer

For i = 1 To 2
curNode.Nodes.Add("Child" & i)
Next i
curNode.Expand()
End If
End Sub

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim curnode As TreeNode = TreeView1.Nodes(4) ' get 5th node in root
curnode.Nodes.Add("Child1")
curnode.Nodes.Add("Child2")
End Sub

End Class

originsone

ASKER

Simplicity. Thanks!