如果是按年编号,代码为:
Select e.DataCol.Name
Case "日期","工艺"
If e.DataRow.IsNull("日期") OrElse e.DataRow.IsNull("工艺") Then
e.DataRow("编号") = Nothing
Else
Dim d As Date = e.DataRow("日期")
Dim y As Integer = d.Year
Dim Days As Integer = Date.DaysInMonth(y,12)
Dim fd As Date = New Date(y,1,1) '获得该年的第一天
Dim ld As Date = New Date(y,12,Days) '获得该年的最后一天
Dim bh As String = e.DataRow("工艺") & "-" & Format(d,"yy") & "-" '生成编号的前缀
If e.DataRow("编号").StartsWith(bh) = False '如果单据编号前缀不符
Dim max As String
Dim idx As Integer
Dim flt As String
flt = "工艺 = '"& e.DataRow("工艺") & "' And 日期 >= #" & fd & "# And 日期 <= #" & ld & "# And [_Identify] <> " & e.DataRow("_Identify")
max = e.DataTable.Compute("Max(编号)",flt) '取得该月的相同工程代码的最大单据编号
If max > "" Then '如果存在最大单据编号
idx = CInt(max.Substring(6,4)) + 1 '获得最大单据编号的后四位顺序号,并加1
Else
idx = 1 '否则顺序号等于1
End If
e.DataRow("编号") = bh & Format(idx,"0000")
End If
End If
End Select
[此贴子已经被作者于2014-1-18 15:27:51编辑过]