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Dim txt As WinForm.TextBox = e.Form.Controls("TextBox1")
If e.sender.Value Is Nothing Then
txt.value = Nothing
Else
Dim d As Date = e.sender.value
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 = "DD" & Format(d,"yyyyMM") '生成编号的前6位,4位年,2位月.
Dim max As String
Dim idx As Integer
max = DataTables("订单").Compute("Max(订单号)","订货日期 >= #" & fd & "# And 订货日期 <= #" & ld & "#") '取得该月的最大编号
If max > "" Then '如果存在最大编号
idx = CInt(max.Substring(9,4)) + 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
txt.value = bh & "-" & Format(idx,"0000")
End If
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Post By：2012/12/6 11:39:00 [显示全部帖子]
