How to add Child nodes under Parent nodes of TreeView in VB.NET from SqlServer database

[shafiq1511]

This is my table

ID ChartName ParentLevel
1 Assets 0
2 Liabilities 0
3 Cash 1
4 Bank 1

I am able to retrieve Treeview Parent Node successfully using below code,

Dim Parent1 As TreeNode
Dim Child1 As TreeNode
Try
con.Open()
Dim reader As SqlDataReader = cmd.ExecuteReader '(CommandBehavior.SingleRow)
While reader.Read()
If reader.Item("ParentLevel") = 0 Then
Parent1 = TreeView1.Nodes.Add(reader.Item("ChartName"))
End If
End While
reader.Close()
Finally
End Try

but unable to populate child nodes under the related parent node.
Result in Treeview should be like this...

-Assets
Cash
Bank
+Liabilities

Help will be apricated.