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multitable bindingsource

multitable bindingsource

multitable bindingsource

I have 2 related tables: tblItem (child) and tblSetItem (master). I am attempting to filter tblSetItem and obtain a related subset from tblItem. Can anyone comment on why an exception is being raised:

"DataMember property 'tblSetItem_tblItem' cannot be found on the DataSource."

I can iterate through the datasource’s parentrelations and find it.

CODE --> vb.net

Dim dr As DataRelation = DbItemsBEDataSet.Relations("tblSetItem_tblItem")
        tblSetItemBindingSource.Filter = "SetID = 28"
        If tblSetItemBindingSource.Count > 0 Then

            Dim bsItemSetItem As New BindingSource
            bsItemSetItem.DataSource = DbItemsBEDataSet.tblItem  'TblItemBindingSource
	     ‘EXCEPTION HERE - DataMember property 'tblSetItem_tblItem' cannot be found on the DataSource.
            bsItemSetItem.DataMember = dr.RelationName 'DbItemsBEDataSet.tblItem.ParentRelations.Item("tblSetItem_tblItem").RelationName
        End If 

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