主题：[求助]根据电脑系统时间编号

类似参考

Dim d As Date = Date.today
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)","日期 >= #" & fd & "# And 日期 <= #" & ld & "# And [_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(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

max = e.DataTable.Compute("Max(编号)","编号 like '" & bh & "%' And [_Identify] <> " & e.DataRow("_Identify")) '取得该月的最大编号