专家坐堂-[求助]自动编号不保存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!

If e.DataCol.Name = "发货日期" Then

If e.DataRow.IsNull("发货日期") Then

e.DataRow("编号") = Nothing

Else

Dim d As Date = e.DataRow("发货日期")

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

If e.DataRow("编号").StartsWith(bh) = False \'如果编号的前6位不符

Dim max As String

Dim idx As Integer

max = e.DataTable.Compute("Max(编号)","发货日期 >= #" & fd & "# And 发货日期 <= #" & ld & "# And [_Identify] <> " & e.DataRow("_Identify"))

If max > "" Then \'如果存在最大编号

idx = CInt(max.Substring(7,3)) + 1 \'获得最大编号的后三位顺序号,并加1

Else

idx = 1 \'否则顺序号等于1

End If

e.DataRow("编号") = bh & "-" & Format(idx,"000")

End If