专家坐堂-找本月的最大编号Foxtable(狐表) - 新一代数据库软件，完美融合Access、Foxpro、Excel、vb.net之优势，人人都能掌握的快速软件开发工具!

Dim dl As Date = Date.Today

Dim y As Integer = dl.Year

Dim m As Integer = dl.Month

Dim d As Integer = dl.day

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 = Format(dl, "yyyyMM") \'生成编号的前6位,4位年,2位月.

If e.DataRow("清单条码编码").StartsWith(bh) = False Then\'如果编号的前8位不符

Dim max As String

Dim idx As Integer

max = e.DataTable.C ompute("Max(清单条码编码)", "[_Identify] <> " & e.DataRow("_Identify")) \'取得该月的最大编号

If max > "" Then \'如果存在最大编号

idx = CInt(max.Substring(max.length - 6)) + 1

Else

idx = 1 \'否则顺序号等于1

End If

e.DataRow("清单条码编码") = bh & Format(idx, "000000")

End If