e.DataRow("已提数量") = DataTables("订单出库明细表").Compute("Sum(已提数量)","产品型号 = '" & e.DataRow("产品型号") & "' And 订单号 = '" & e.DataRow("订单号") & "'")
e.DataRow("已提数量") = iif(e.DataRow("已提数量")=nothing, 0, e.DataRow("已提数量"))