主题：编写下次自动生成的起号

老师：

       您给编的自动生成的起号可以用了。但还有一个小问题，就是要作到当售出张数为空时，所在行的售出起号也为空，请老师在原代码上改写一下！

 

      以下是您已编 的代码和我出现问题的截图：

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   Select Case e.DataCol.Name
   
    Case "姓名","上年结转_张数","领入_张数","售出_张数","结存张数","售出_废piao","售出_金额","所领入_张数","所领入结存张数"
       
        Dim dr As DataRow
       
        Dim mr As DataRow = e.DataRow
       
        Dim drs As List(of DataRow)
       
        dr = e.DataTable.Find("[_SortKey] < " & mr("_SortKey") & " And [姓名] = '" & mr("姓名") & "'", "[_SortKey] Desc")
       
        If dr Is Nothing Then '如果没有上一行,说明本行就是同产品的第一行
           
            mr("结存张数") = mr("上年结转_张数") + mr("领入_张数") - mr("售出_张数")- mr("售出_废piao")
           
            mr("结存金额") = mr("售出_金额")
            mr("所领入结存张数") = mr("所领入_张数")
           
            dr = mr
           
        Else
            If dr.IsNull("售出_止号") = False Then
                e.DataRow("售出_起号") = val(dr("售出_止号")) + 1
            ElseIf dr.IsNull("上年结转_起号") = False Then
                e.DataRow("售出_起号") = val(dr("上年结转_起号"))
            End If
        End If
        drs = e.DataTable.Select("[_SortKey] >= " & dr("_SortKey") & " And [姓名] = '" & dr("姓名") & "'")
       
        For i As Integer = 1 To drs.Count - 1 '重算余下行的余额
           
            drs(i)("结存张数") = drs(i-1)("结存张数") + drs(i)("上年结转_张数") + drs(i)("领入_张数") - drs(i)("售出_张数")- drs(i)("售出_废piao")
           
            drs(i)("结存金额") = drs(i-1)("结存金额") + drs(i)("售出_金额")
            drs(i)("所领入结存张数") = drs(i-1)("所领入结存张数") + drs(i)("所领入_张数")
           
        Next
       

此主题相关图片如下：xr3k5n0{6kvh{3(wgo~2j0k.png