Нужно получить ID узла по нажатию кнопки. На руте срабатывает нормально, но на ребенке выдает ошибку.
Спасибо.


Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'Put user code to initialize the page here
If Not IsPostBack Then


Dim tvFirst = New TreeNode
tvFirst.text = "node1"
tvFirst.id = "n1"

Dim tvSecond = New TreeNode
tvSecond.text = "node2"
tvSecond.id = "n2"

tvFirst.Nodes.Add(tvSecond)

TreeView1.Nodes.Add(tvFirst)
End If

End Sub

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Label1.Text = TreeView1.Nodes(TreeView1.SelectedNodeIndex).ID
End Sub

Текст ошибки:
Exception Details: System.FormatException: Input string was not in a correct format.

Source Error:

Line 47:
Line 48: Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Line 49: Label1.Text = TreeView1.Nodes(TreeView1.SelectedNodeIndex).ID
Line 50: End Sub
Line 51: End Class

Вот так работает.

Label2.Text = TreeView1.GetNodeFromIndex(TreeView1.SelectedNodeIndex).ID