主题：求助，专用价格表的设计思路？

参考 http://www.foxtable.com/help/topics/1459.htm

 Datacolchanged事件，加入如下代码

Select e.DataCol.Name
    Case "订单编号"
        If e.DataRow.IsNull("订单编号") Then
            e.DataRow("产品编号") = Nothing
        Else
            Dim lb As String = e.DataRow("订单编号")
            If e.DataRow("产品编号").StartsWith(lb) = False '如果单据编号前缀不符
                Dim max As String
                Dim idx As Integer
                max = e.DataTable.Compute("Max(产品编号)","订单编号 = '" & lb & "' And [_Identify] <> " & e.DataRow("_Identify")) '取得该类别的最大编号
                If max > "" Then '如果存在最大编号
                    idx = CInt(max.Substring( max.IndexOf ("-")+3,3) +1 )'获得最大编号的后三位顺序号,并加1
                Else
                    idx = 1 '否则顺序号等于1
                End If
                e.DataRow("产品编号") = lb & Format(idx,"000")
            End If
        End If
    Case "产品类型", "产品规格"
        If e.DataRow.IsNull("产品类型") = False AndAlso e.DataRow.IsNull("产品规格") = False Then
            Dim fdr As DataRow = DataTables("价格表").Find("产品类型 = '" & e.DataRow("产品类型") & "' and 产品规格 = '" & e.DataRow("产品规格") & "'")
            If fdr IsNot Nothing Then
                Dim pdr As DataRow = e.DataRow.GetParentRow("订单汇总表")
                If pdr IsNot Nothing AndAlso pdr.IsNull("影楼名称") = False AndAlso DataTables("价格表").DataCols.Contains(pdr("影楼名称") & "专用价格") Then
                    e.DataRow("制作单价") = fdr(pdr("影楼名称") & "专用价格")
                Else
                    e.DataRow("制作单价") = fdr("制作单价")
                End If
            End If
        End If
End Select