主题：又出现错误框框了~！

Select Case e.DataCol.Name
    Case "产品编号","等级","色号","入库","出库"
        Dim dr As DataRow
        Dim mr As DataRow = e.DataRow
        Dim drs As List(of DataRow)
        dr = e.DataTable.Find("[_SortKey] < " & mr("_SortKey") & " And [产品编号] = '" & mr("产品编号") & "'And [等级] = '" & mr("等级") & "'And [色号] = " & mr("色号") , "[_SortKey] Desc")
        If dr Is Nothing Then
            mr("库存") = mr("入库") - mr("出库")
            dr = mr
        End If
        drs = e.DataTable.Select("[_SortKey] >= " & dr("_SortKey") & " And [产品编号] = '" & mr("产品编号") & "'And [等级] = '" & mr("等级") & "'And [色号] = " & mr("色号") , "[_SortKey]")
        For i As Integer = 1 To drs.Count - 1
            drs(i)("库存") = drs(i-1)("库存") + drs(i)("入库") - drs(i)("出库")
        Next
End Select

注意色号是整数型，表达式是不能用单引号的，请参考:

http://help.foxtable.com/topics/1284.htm