ช่วยหน่อยคับพอดีแก้โค้ดเก่า คนอื่นคับ เลยอยากรู้ว่าโครงสร้างมันเป็นยังไงคับช่วยหน่อยนะคับ

Private Sub dgvDryingOrganicLongan_CellValidating(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellValidatingEventArgs) Handles dgvDryingOrganicLonganBake.CellValidating
        If e.ColumnIndex = -1 Then Exit Sub
        If e.RowIndex = -1 Then Exit Sub

        'เช็คตัวเลขColumn8
        If dgvDryingOrganicLonganBake.Columns(e.ColumnIndex).Name = "dgvLmaiDryWeight" Or dgvDryingOrganicLonganBake.Columns(e.ColumnIndex).Name = "dgvWeightLoss" Or _
         dgvDryingOrganicLonganBake.Columns(e.ColumnIndex).Name = "Column8" Then
            If CStr(e.FormattedValue) <> "" Then
                If IsNumeric(e.FormattedValue) = False Then
                    e.Cancel = True
                    MessageBox.Show("ไม่สามารถใส่ตัวอักษรได้  ใส่ได้เฉพาะตัวเลขเท่านั้น!!!", "ผลการทำงาน", MessageBoxButtons.OK, MessageBoxIcon.Information)
                    Exit Sub
                End If
            End If
        End If
        '#########################################################################################
        '#########################################################################################
        If dgvDryingOrganicLonganBake.Columns(e.ColumnIndex).Name = "Column2" Then
            If CStr(e.FormattedValue) <> "" Then
                Dim dtCountLot As New DataTable()
                Dim CountLot As Integer = 1
                Dim Sql As String = "SELECT LotNo FROM DryingOrganicLonganBake WHERE LotNo=@LotNo"

                Com = New SqlCommand()
                With Conn
                    If .State = ConnectionState.Open Then .Close()
                    .ConnectionString = strConn
                    .Open()
                End With

                For i = 0 To 8
                    With Com
                        .Parameters.Clear()
                        .CommandType = CommandType.Text
                        .CommandText = Sql
                        .Connection = Conn
                        .Parameters.Add("@LotNo", SqlDbType.NVarChar).Value = "D" & CountLot & CDate(e.FormattedValue).Day().ToString("00") & CDate(e.FormattedValue).Month().ToString("00") & CStr(dgvDryingOrganicLonganBake.Rows(e.RowIndex).Cells(0).Value).Remove(0, 5).Remove(2, 6)
                        dr = .ExecuteReader()
                        If dr.HasRows Then
                            dtCountLot.Load(dr)
                            CountLot = CountLot + 1
                        Else
                            Exit For
                        End If
                    End With
                    dr.Close()
                Next
                dgvDryingOrganicLonganBake.Rows(e.RowIndex).Cells(2).Value = "D" & CountLot & CDate(e.FormattedValue).Day().ToString("00") & CDate(e.FormattedValue).Month().ToString("00") & CStr(dgvDryingOrganicLonganBake.Rows(e.RowIndex).Cells(0).Value).Remove(0, 5).Remove(2, 6)
            End If
        End If
        '###################################################################################################################
        If dgvDryingOrganicLonganBake.Columns(e.ColumnIndex).Name = "dgvWeightLoss" Then
            If CStr(e.FormattedValue) <> "" Then

                If CDbl(dgvDryingOrganicLonganBake.Rows(e.RowIndex).Cells(4).Value) < CDbl(e.FormattedValue) Then
                    e.Cancel = True
                    MessageBox.Show("คุณกรอกจำนวนน้ำหนักที่สูญเสียมากกว่าจำนวนน้ำหนักรับเข้า  !!!", "ผลการทำงาน", MessageBoxButtons.OK, MessageBoxIcon.Information)
                    Exit Sub
                End If

                If CStr(dgvDryingOrganicLonganBake.Rows(e.RowIndex).Cells(5).Value) = "" Then dgvDryingOrganicLonganBake.Rows(e.RowIndex).Cells(5).Value = 0
                If CStr(dgvDryingOrganicLonganBake.Rows(e.RowIndex).Cells(6).Value) = "" Then dgvDryingOrganicLonganBake.Rows(e.RowIndex).Cells(6).Value = 0

                dgvDryingOrganicLonganBake.Rows(e.RowIndex).Cells(6).Value = CDbl(dgvDryingOrganicLonganBake.Rows(e.RowIndex).Cells(4).Value) - CDbl(e.FormattedValue)

                If CStr(dgvDryingOrganicLonganBake.Rows(e.RowIndex).Cells(5).Value) = "0" Then dgvDryingOrganicLonganBake.Rows(e.RowIndex).Cells(5).Value = ""
                If CStr(dgvDryingOrganicLonganBake.Rows(e.RowIndex).Cells(6).Value) = "0" Then dgvDryingOrganicLonganBake.Rows(e.RowIndex).Cells(6).Value = ""

            End If
        ElseIf dgvDryingOrganicLonganBake.Columns(e.ColumnIndex).Name = "dgvLmaiDryWeight" Then
            If CStr(e.FormattedValue) <> "" Then

                If CDbl(dgvDryingOrganicLonganBake.Rows(e.RowIndex).Cells(4).Value) < CDbl(e.FormattedValue) Then
                    e.Cancel = True
                    MessageBox.Show("คุณกรอกจำนวนน้ำหนักลำไยแห้งมากกว่าจำนวนน้ำหนักรับเข้า  !!!", "ผลการทำงาน", MessageBoxButtons.OK, MessageBoxIcon.Information)
                    Exit Sub
                End If

                If CStr(dgvDryingOrganicLonganBake.Rows(e.RowIndex).Cells(5).Value) = "" Then dgvDryingOrganicLonganBake.Rows(e.RowIndex).Cells(5).Value = 0
                If CStr(dgvDryingOrganicLonganBake.Rows(e.RowIndex).Cells(6).Value) = "" Then dgvDryingOrganicLonganBake.Rows(e.RowIndex).Cells(6).Value = 0

                dgvDryingOrganicLonganBake.Rows(e.RowIndex).Cells(5).Value = CDbl(dgvDryingOrganicLonganBake.Rows(e.RowIndex).Cells(4).Value) - CDbl(e.FormattedValue)

                If CStr(dgvDryingOrganicLonganBake.Rows(e.RowIndex).Cells(5).Value) = "0" Then dgvDryingOrganicLonganBake.Rows(e.RowIndex).Cells(5).Value = ""
                If CStr(dgvDryingOrganicLonganBake.Rows(e.RowIndex).Cells(6).Value) = "0" Then dgvDryingOrganicLonganBake.Rows(e.RowIndex).Cells(6).Value = ""
            End If
        End If
    End Sub