Select e.DataCol.Name
Case "设备名称","设备型号"
If e.DataRow.IsNull("设备名称") Then
e.DataRow("厂内编号") = Nothing
Else
Dim lb As String = e.DataRow("设备名称")
Dim ab As String = e.DataRow("设备型号")
Dim bh as string = lb & ab
If e.DataRow("厂内编号").StartsWith(bh) = False '如果单据编号前缀不符
Dim max As String
Dim idx As Integer
max = e.DataTable.Compute("Max(厂内编号)","设备名称 = '" & lb & "' and 设备型号 = '" & ab & "' 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(bh.length,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("厂内编号") = bh & Format(idx,"000")
End If
End If
End Select