' Create the relation Dim dr As New Infragistics.Web.UI.DataSourceControls.DataRelation() ' Specify the parent view in the relation dr.ParentDataViewID = "SqlDataSource_View1" ' Specify the parent column to use for the relation dr.ParentColumns = New String() {"RegionID"} ' Specify the child view in the relation dr.ChildDataViewID = "SqlDataSource_View2" 'Specify the child column to use in the relation dr.ChildColumns = New String() {"RegionID"} ' Add the relation to WebHierarchicalDataSource Me.WebHierarchicalDataSource1.DataRelations.Add(dr)