--
Select e.DataCol.Name
Case "辅助PassId"
If e.DataRow.IsNull("辅助PassId") Then
e.DataRow("辅助PassID2") = Nothing
Else
Dim lb As String = e.DataRow("辅助PassId")
If e.DataRow("辅助PassID2").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.Compute("Max(辅助PassID2)", "辅助PassId = \'" & 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(2, 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("辅助PassID2") = lb & Format(idx, "000")
End If
End If
End Select