主题：求助关于自动编号的问题

If e.DataCol.Name = "制表日期" Then

    If e.DataRow.IsNull("制表日期" ) Then

        e.DataRow("表格编号") = Nothing

    Else

        Dim bh As String = Format(e.DataRow("制表日期"),"yyyyMM") '取得编号的6位前缀

        If e.DataRow("表格编号").StartsWith(bh) = False '如果编号的前6位不符

            Dim fdr As DataRow = e.DataTable.find("制表日期 = #" & e.DataRow("制表日期") & "# And [_Identify] <> " & e.DataRow("_Identify"))

            If fdr IsNot Nothing Then

                e.DataRow("表格编号") = fdr("表格编号")

            Else

                Dim max As String

                Dim idx As Integer

                max = e.DataTable.Compute("Max(表格编号)","表格编号 like '" & bh & "-%' And [_Identify] <> " & e.DataRow("_Identify")) '取得该天的最大编号

                If max > "" Then '如果存在最大编号

                    idx = CInt(max.Substring(bh.length+1,3)) + 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("表格编号") = bh & "-" & Format(idx,"000")

            End If

        End If

    End If

End If