Select e.DataCol.Name
Case "制单时间","生产车间"
If e.DataRow.IsNull("制单时间") OrElse e.DataRow.IsNull("生产车间") Then
e.DataRow("产品批号") = Nothing
Else
Dim d As Date = e.DataRow("制单时间")
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 = e.DataRow("生产车间") & Format(d,"yyMM") '生成编号的前缀
If e.DataRow("产品批号").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 = "生产车间 = '"& e.DataRow("生产车间") & "' And 制单时间 >= #" & fd & "# And 制单时间 <= #" & ld & "# And [_Identify] <> " & e.DataRow("_Identify")
max = e.DataTable.Compute("Max(产品批号)",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(6,3)) + 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("产品批号") = bh & Format(idx,"000")
End If
End If
End Select