Dim d As Date = e.Form.Controls("DateTimePicker1").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 = Format(d,"yyyyMM") '生成编号的前6位,4位年,2位月. If Tables("预存表").Current("编号").StartsWith(bh) = False '如果编号的前6位不符 Dim max As String Dim idx As Integer max = Tables("预存表").Compute("Max(编号)","预存日期 >= #" & fd & "# And 预存日期 <= #" & ld & "# And [_Identify] <> " & Tables("预存表").("_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(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 Tables("预存表").Current("编号") = bh & "-" & Format(idx,"000") End If
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