主题：一个关于行定位的奇怪问题

Dim cb As String = e.Form.Controls("ComboBox1").Value

Dim tb As String = e.Form.Controls("ComboBox2").Value

If cb = "生产号码"

    Dim ii As Integer

    Dim sz1 As String

    Dim zf1 As String

    For ii = 0 To tb.Length - 1

        If Char.IsDigit(tb.Chars(ii)) Then

            sz1 = sz1 + tb.Chars(ii)

        Else

            zf1 = zf1 + tb.Chars(ii)

        End If

    Next

    Dim cmd As new SQLCommand

    cmd.C

    Dim dr As DataTable

    cmd.CommandText = "Select 生产单号,条码起始号,订单总数量 from {新建订单} where 条码起始号 is not null order by [条码起始号]"

    dr = cmd.ExecuteReader()

    Dim hh As Integer = dr.DataRows.Count

    For i As Integer = 0 To hh - 1

        Dim qsh1 As String = dr.datarows(i)("条码起始号")

        Dim zsl As Long = dr.datarows(i)("订单总数量")

        Dim sz2 As String = ""

        Dim zf3 As String = ""

        For ii = 0 To qsh1.Length - 1

            If Char.IsDigit(qsh1.Chars(ii)) Then

                sz2 = sz2 + qsh1.Chars(ii)

            Else

                zf3 = zf3 + qsh1.Chars(ii)

            End If

        Next

        If Clng(sz1) >= Clng(sz2) And Clng(sz1) <= (Clng(sz2) + zsl)

            Dim scd As Long = dr.datarows(i)("生产单号")

            DataTables("新建订单").LoadFilter = " 生产单号 =  " & scd & " "

            DataTables("新建订单").Load

            Dim sch As Integer = Tables("新建订单.生产号码表").rows.Count

            For iii As Integer = 0 To sch - 1

                Dim jsh1 As String = Tables("新建订单.生产号码表").rows(iii)("生产号码_结束")

                Dim sz3 As String = ""

                For ii = 0 To jsh1.Length - 1

                    If Char.IsDigit(jsh1.Chars(ii)) Then

                        Sz3 = sz3 + jsh1.Chars(ii)

                    End If

                Next

                If Clng(sz1) <= Clng(sz3)

                    Tables("新建订单.生产号码表").Position = iii '定位到找到的行

                    Exit For

                End If

            Next

            Exit For

        End If

    Next

End If