主题：老师请教有关编码

If e.DataCol.Name = "产品信息_产品名称" OrElse e.DataCol.name = "产品信息_产品批号" Then
    If e.DataRow.isnull("产品信息_产品名称") OrElse e.DataRow.isnull("产品信息_产品批号")Then
        e.DataRow("产品信息_产品编码") = Nothing
    Else
        e.DataRow("产品信息_产品编码") = GetPy(e.DataRow("产品信息_产品名称"), 1) & e.DataRow("产品信息_产品批号").replace("*", "")
    End If
End If
Select Case e.DataCol.Name
    Case  "产品信息_产品编码","出入库信息_入库数量","出入库信息_出库数量"
        Dim drs  As  List(of DataRow)
        Dim Filter As String
        Filter =  "[_SortKey] >= " & e.DataRow("_SortKey") & " And [产品信息_产品编码] = '" & e.DataRow("产品信息_产品编码") & "'"
        drs = e.DataTable.Select(Filter)
        For Each dr As  DataRow  In drs
            Filter =  "[_SortKey] <= " & dr("_SortKey") & " And [产品信息_产品编码] = '" & dr("产品信息_产品编码") & "'"
            Dim Val1 As Double = e.DataTable.Compute("Sum(出入库信息_入库数量)",Filter)
            Dim Val2 As Double = e.DataTable.Compute("Sum(出入库信息_出库数量)",Filter)
            Dim Val3 As Double = e.DataTable.Compute("Sum(库存结余)",Filter & " And 出入库信息_入库数量 Is null And  出入库信息_出库数量 Is null")
            dr("库存结余") = Val1 - Val2 + val3
        Next
        If e.DataCol.Name = "产品信息_产品编码" AndAlso e.OldValue IsNot Nothing AndAlso e.OldValue <> e.NewValue  Then
            Filter =  "[_SortKey] > " & e.DataRow("_SortKey") & " And [产品信息_产品编码] = '" & e.OldValue &  "'"
            drs = e.DataTable.Select(Filter)
            For Each dr As  DataRow  In drs
                Filter =  "[_SortKey] <= " & dr("_SortKey") & " And [产品信息_产品编码] = '" & dr("产品信息_产品编码") & "'"
                Dim Val1 As Double = e.DataTable.Compute("Sum(出入库信息_入库数量)",Filter)
                Dim Val2 As Double = e.DataTable.Compute("Sum(出入库信息_出库数量)",Filter)
                Dim Val3 As Double = e.DataTable.Compute("Sum(库存结余)",Filter & " And 出入信息_入库数量 Is null And 出入信息_出库数量 Is null")
                dr("库存结余") = Val1 - Val2 + val3
            Next
        End If
    End  Select

老师：您好！上述代码如何实现“产品编码”由"产品信息_产品名称+产品信息_产品批号+产品信息_规格”组成，如：”产品信息_产品名称”麻醉包，”产品信息_产品批号”20170602，”产品信息_规格”"15*10”或"15/10"，“产品编码”为：20170603MZB-1510.谢谢

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