Save TreeView

Hi.

How to save TreeView. I have no problem read data from database, like this:

   Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load

        Me.TblSkydeHoldTableAdapter.Fill(Me.SkyttecenteretDataSet.tblSkydeHold)

        Me.RadTreeView1.DisplayMember = "name"
        Me.RadTreeView1.ParentMember = "pid"
        Me.RadTreeView1.ChildMember = "id"
        Me.RadTreeView1.ValueMember = "id"

        Me.RadTreeView1.DataSource = Me.GetSampleData()

    End Sub

    Private Function GetSampleData() As DataTable

        Dim dt As New DataTable()
        Dim dc As New DataColumn()
        dc.ColumnName = "id"
        dc.DataType = GetType(Integer)
        dt.Columns.Add(dc)
        Dim dc1 As New DataColumn()
        dc1.ColumnName = "name"
        dc1.DataType = GetType(String)
        dt.Columns.Add(dc1)
        Dim dc2 As New DataColumn()
        dc2.ColumnName = "pid"
        dc2.DataType = GetType(Integer)
        dt.Columns.Add(dc2)


        Me.TblSkydeHoldTableAdapter.Fill(Me.SkyttecenteretDataSet.tblSkydeHold)

        For Each dRow As DataRow In Me.TblSkydeHoldTableAdapter.GetData
            Dim dr As DataRow = dt.NewRow()
            dr(0) = dRow.Item("dr0")
            dr(1) = dRow.Item("dr1")
            dr(2) = dRow.Item("dr2")
            dt.Rows.Add(dr)
        Next

        Return dt

    End Function

But my problem starts when i want to save back to database. When i add a new node, the node have no parentmember value or valuemeber value. Is it possible to add those values automaticly when a new node is created?

Kindly Peter