Select Case e.DataCol.Name
Case "订单日期","销售人员"
If e.DataRow.IsNull("订单日期") = True OrElse e.DataRow.Isnull("销售人员") = True Then
e.DataRow("订单编号") = Nothing
Else
Dim lb As String = "HD" & getpy(e.DataRow("销售人员"),True) & Format(e.DataRow("订单日期"),"yyMMdd")
If e.DataRow("订单编号").StartsWith(lb) = False Then '如果单据编号前缀不符
Dim max As String
Dim idx As Integer
max = e.DataTable.SQLCompute("Max(订单编号)","订单编号 like 'lb%' And [_Identify] <> " & e.DataRow("_Identify")) '取得该类别的最大编号
If max > "" Then '如果存在最大编号
idx = CInt(max.SubString(lb.length,2)) +1 '获得最大编号的后两位顺序号,并加1
Else
idx = 1 '否则顺序号等于1
End If
e.DataRow("订单编号") = lb & Format(idx,"00")
e.DataRow.Save
End If
End If
End Select