主题：如何根据流水帐例二表得到库存表哪？

'库存表MainTableChanged事件代码:

if MainTable.Name = "库存表" Then
    dim f As New Filler
    f.SourceTable = DataTables("例子二")
    f.SourceCols = "产品"
    f.DataTable = DataTables("库存表")
    f.DataCols = "产品"
    f.ExcludeExistValue = True
    f.Fill()
    For Each dr As DataRow In DataTables("库存表").DataRows
        Dim dr1 As DataRow = DataTables("例子二").Find("产品 = '" & dr("产品") & "'","日期 Desc")
        dr("日期") = dr1("日期")
        dr("库存") = dr1("库存")
    Next
End If