จัดการ datasource ของ DataGridViewComboBoxColumn ตามค่าของคอลัมภ์อื่น (WinApp)

Private Sub LoadLabViewData()
        Try
            If objConn.State = ConnectionState.Closed Then
                ConDB()
            Else
            End If

            dtLbVw.Clear()
            'pLabNoLV = "100535"     'Tmp value
            strSQL = "SELECT Z.result_id,Z.lab_item_code,Z.lab_item_name,Z.result_machine,Z.lab_item_normal,Y.progress_detail " &
                     "FROM worklist_result Z LEFT JOIN progress Y ON Z.order_status=Y.progress_code " &
                     "WHERE Z.lab_number=" & pLabNoLV & " ORDER BY Z.display_order;"
            With objCmd
                .Connection = objConn
                .CommandText = strSQL
                .CommandType = CommandType.Text
            End With
            dtAdapter.SelectCommand = objCmd
            dtAdapter.Fill(dtLbVw)
            If dtLbVw.Rows.Count > 0 Then
                gvLabViewData.DataSource = dtLbVw

                gvLabViewData.Columns("result_id").Visible = False
                gvLabViewData.Columns("lab_item_code").Visible = False
                gvLabViewData.Columns("lab_item_name").HeaderText = "รายการตรวจ"
                gvLabViewData.Columns("result_machine").HeaderText = "ผลการตรวจ"
                gvLabViewData.Columns("lab_item_normal").HeaderText = "ค่าปกติ"
                gvLabViewData.Columns("progress_detail").HeaderText = "สถานะ"

                gvLabViewData.ReadOnly = False
                For Each dgvc As DataGridViewColumn In gvLabViewData.Columns
                    dgvc.ReadOnly = True
                Next
                gvLabViewData.Columns("result_machine").ReadOnly = False  'ทำไว้ให้สามารถพิมพ์ได้ แต่ให้ user เลือกจะดีกว่า

                If gvLabViewData.Columns.Count >= 7 Then
                Else
                    Dim cmb As New DataGridViewComboBoxColumn()
                    cmb.HeaderText = "SelectResult"
                    cmb.Name = "cmb"
                    'cmb.MaxDropDownItems = 4
                    'cmb.Items.Add("True")
                    'cmb.Items.Add("False")

                    For Each row As DataGridViewRow In gvLabViewData.Rows
                        If Not row.IsNewRow Then
                            GetResultList(row.Cells(1).Value)
                            cmb.DataSource = dt
                            cmb.DisplayMember = "auto_result_text"
                            cmb.ValueMember = "auto_result_text"
                        Else
                        End If
                    Next
                    gvLabViewData.Columns.Add(cmb)
                End If
            Else
                gvLabViewData.DataSource = Nothing
            End If
        Catch ex As Exception
            Throw ex
        End Try
    End Sub

    Public Function GetResultList(ByVal pLabItemCode As Integer) As DataTable
        Try
            If objConn.State = ConnectionState.Closed Then
                ConDB()
            Else
            End If

            dt.Clear()
            Dim str As String
            str = "SELECT A.auto_result_text FROM auto_result A WHERE A.lab_item_code=" & pLabItemCode & " ORDER BY A.dis_order;"
            With objCmd
                .Connection = objConn
                .CommandText = str
                .CommandType = CommandType.Text
            End With
            dtAdapter.SelectCommand = objCmd
            dtAdapter.Fill(dt)
            Return dt
        Catch ex As Exception
            Throw ex
        End Try
    End Function