Hi, I seem to have the following problem while using the WHDG.

----------------------------------------------------------------------------------------

CODE

----------------------------------------------------------------------------------------

<asp:UpdatePanel ID="async_RefreshKlasses" runat="server" meta:resourcekey="async_RefreshKlassesResource1">
            <ContentTemplate>
                <ig:WebHierarchicalDataGrid ID="uwgKlasse" runat="server" DataSourceID="dsKlasse"
                    meta:resourcekey="uwgKlasse" AutoGenerateBands="false" AutoGenerateColumns="false" />
                <asp:HiddenField runat="server" ID="hdnKlasseID" />
                <asp:HiddenField runat="server" ID="hdnContentRefresh" Value="False" />
            </ContentTemplate>
        </asp:UpdatePanel>
        <ig:WebHierarchicalDataSource ID="dsKlasse" runat="server">
            <DataViews>
                <ig:DataView ID="ds_Klasse" DataSourceID="odsKlasse" DataMember="DefaultView" />
                <ig:DataView ID="ds_Vhc" DataSourceID="odsVh" DataMember="DefaultView" />
            </DataViews>
            <DataRelations>
                <ig:DataRelation ParentColumns="KlsID" ParentDataViewID="ds_Klasse" ChildColumns="VhcKlsID"
                    ChildDataViewID="ds_Vhc" />
            </DataRelations>
        </ig:WebHierarchicalDataSource>

----------------------------------------------------------------------------------------

- objectdatasources are correct -

I create the layout of my grid once, in the page_init

----------------------------------------------------------------------------------------

CODE BEHIND

----------------------------------------------------------------------------------------

            Dim col As Infragistics.Web.UI.GridControls.BoundDataField
            Dim b As Infragistics.Web.UI.GridControls.Band

            With uwgKlasse
                .DataKeyFields = "KlsID"
                .InitialDataBindDepth = 0
                .Width = 970
                SetBehaviors()          'This sets sorting, selection, blah blah 
            End With

            col = New Infragistics.Web.UI.GridControls.BoundDataField
            With col
                .Key = "KlsID"
                .DataFieldName = .Key
                .Hidden = True   'THE LINE!!
                uwgKlasse.Columns.Add(col)
            End With
            col = New Infragistics.Web.UI.GridControls.BoundDataField
            With col
                .Key = "KlsName"
                .DataFieldName = .Key
                .Header.Text = GetLocalResourceObject("DESCR")
                .Width = 150
                uwgKlasse.Columns.Add(col)
            End With
            col = New Infragistics.Web.UI.GridControls.BoundDataField
            With col
                .Key = "KlsPrice"
                .DataFieldName = .Key
                .Header.Text = GetLocalResourceObject("PRICE")
                .Width = 80
                .CssClass = "grid-Cell-right"
                .Header.CssClass = "grid-Header-right"
                .DataFormatString = "{0:C2}"
                uwgKlasse.Columns.Add(col)
            End With

 '------ Child data ------
            b = New Infragistics.Web.UI.GridControls.Band()
            With b
                .DataMember = "ds_Vhc"
                .AutoGenerateColumns = False
                .DataKeyFields = "VhcID"
                .Key = "bandVhc"
                uwgKlasse.Bands.Add(b)
                uwgKlasse.RefreshBehaviors()
            End With

            col = New Infragistics.Web.UI.GridControls.BoundDataField
            With col
                .Key = "VhcDescr"
                .DataFieldName = "VhcDescr"
                .Header.Text = GetLocalResourceObject("DESCR")
                .Width = 150
                uwgKlasse.Bands("bandVhc").Columns.Add(col)
            End With

----------------------------------------------------------------------------------------

This all works, I get the main data, but I don't get the child band.

IF I remove "the line" .Hidden = true on my KlsID, the band appears.

What am I doing wrong?