Hierarchical grid and stored procedures

[mabs]

I am currently looking at the following demo,

http://demos.telerik.com/aspnet-ajax/grid/examples/programming/hierarchy/defaultvb.aspx

Which show how to build a hierarchial grid programmaticaly.  The problem I have is that I wish to use a datatable populated from a stored procedure for the grids.  I have tried the following,

Private Sub Page_Init(ByVal sender As Object, ByVal e As EventArgs) Handles MyBase.Init
    buildGrid()
End Sub

Sub buildGrid()

    Dim state As String = drp_state.SelectedValue
    If state = "" Then
        state = 0
    End If

    Dim dt As DataTable = myDataAccessClass.data1(param1, param2)
    Datasource = dt
    GridDataKeyNames = "ID"
    ' masterTableCreation builds and adds the columns, no issue with this.
    masterTableCreation()

    Dim dtSub As DataTable = myDataAccessClass.data1(param3)
    hierarchyTable(dtSub, "", "ID", "ID")

End Sub


Public Sub hierarchyTable(ByVal dt As DataTable, ByVal datakeys As String, ByVal masterKeyField As String, ByVal detailKeyField As String)


    Dim hierarchyTable As New GridTableView(RadGrid1)
    ' set the datasouce
    hierarchyTable.DataSource = dt
    hierarchyTable.Width = Unit.Percentage(100)

    Dim datakeysArray() As String
    If datakeys <> "" Then
        datakeysArray = datakeys.Split(",".ToArray())
        hierarchyTable.DataKeyNames = datakeysArray
    End If

    Dim relationFields As GridRelationFields = New GridRelationFields()
    relationFields.MasterKeyField = masterKeyField
    relationFields.DetailKeyField = detailKeyField
    hierarchyTable.ParentTableRelation.Add(relationFields)
    RadGrid1.MasterTableView.DetailTables.Add(hierarchyTable)

    'add columns
    Dim boundColumn As GridBoundColumn

    hierarchyTable.Columns.Clear()

    For i As Int32 = 0 To Datasource.Columns.Count - 1
        Dim column As DataColumn = Datasource.Columns(i)

        Dim colDataType As String = column.DataType.ToString().ToLower().Replace("system.", "")

        boundColumn = New GridBoundColumn
        hierarchyTable.Columns.Add(boundColumn)

        boundColumn.DataField = column.ColumnName
        boundColumn.HeaderText = column.ColumnName.Replace("_", " ").ToLower()

        boundColumn.DataFormatString = "<nobr>{0}</nobr>"
        boundColumn.ItemStyle.HorizontalAlign = HorizontalAlign.Left

    Next

End Sub

<telerik:RadGrid ID="RadGrid1" runat="server" AutoGenerateColumns="False" AllowSorting="True" AllowPaging="True" PageSize="5" GridLines="None" ShowGroupPanel="True">
    <MasterTableView AllowMultiColumnSorting="True" GroupLoadMode="Server">
    </MasterTableView>
    <PagerStyle Mode="NextPrevNumericAndAdvanced"></PagerStyle>
    <ClientSettings AllowDragToGroup="true" />
</telerik:RadGrid>

The grid will expand to show the child table, however with no data.  Any pointers would be much appreciated.

[mabs]

fixed, I needed to add a pagesize to the child table,

hierarchyTable.PageSize = 10