主题：想实现的功能请教一下能否实现

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想实现的功能请教一下能否实现，若想实现相关的帮助文件能发一下吗

参考

 

http://www.foxtable.com/webhelp/scr/2403.htm

 

http://www.foxtable.com/webhelp/scr/1451.htm

 

http://www.foxtable.com/webhelp/scr/1472.htm

 

Select e.DataCol.Name
    Case "产品代号","供应商管理SQE" ,"供货数量" ,"截止日期" ,"供应商"
        If e.DataRow.IsNull("产品代号") OrElse e.DataRow.IsNull("供应商管理SQE")  OrElse e.DataRow.IsNull("供货数量")  OrElse e.DataRow.IsNull("截止日期") OrElse e.DataRow.IsNull("供应商")Then
            e.DataRow("订单编号") = Nothing
        Else
            Dim d As Date = e.DataRow("截止日期")
            Dim y As Integer = d.Year
            Dim m As Integer = d.Month
            Dim Days As Integer = Date.DaysInMonth(y,m)
            Dim fd As Date = New Date(y,m,1) '获得该月的第一天
            Dim ld As Date = New Date(y,m,Days) '获得该月的最后一天
            Dim bh As String = e.DataRow("产品代号") & "-" & e.DataRow("供应商管理SQE") & "-" & e.DataRow("供应商") & "-" & e.DataRow("供货数量") & Format(d,"yyyyMM") & "-" '生成编号的前缀
            If e.DataRow("订单编号").StartsWith(bh) = False '如果单据编号前缀不符
                Dim max As String
                Dim idx As Integer
                Dim flt As String
                flt = "产品代号 = '"& e.DataRow("产品代号") & "' And 供应商管理SQE= '"& e.DataRow("供应商管理SQE") & "'And 供应商 = '"& e.DataRow("供应商") & "' And 供货数量 = '"& e.DataRow("供货数量")& "' And 制单日期 >= #" & fd & "# And 制单日期 <= #" & ld & "# And [_Identify] <> " & e.DataRow("_Identify")
                max = e.DataTable.Compute("Max(订单编号)",flt) '取得该月的相同工程代码的最大单据编号
                If max > "" Then '如果存在最大单据编号
                    idx = CInt(max.Substring(bh.length,4)) + 1 '获得最大单据编号的后四位顺序号,并加1
                Else
                    idx = 1 '否则顺序号等于1
                End If
                e.DataRow("订单编号") = bh & Format(idx,"0000")
            End If
        End If
End Select