ผมจะคำนวณผลรวมเงินใน gridview ยังไงครับ แนะนำด้วยครับ

Private Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound

        Dim sumQty As Double
        Dim sumTotal As Double
'เพิ่ม
sumtotal=0
        For i As Integer = 0 To GridView1.Rows.Count - 1
            Dim Qty1 As Double = DirectCast(GridView1.Rows(i).FindControl("Quantity"), Label).Text()
            Dim Qty2 As Double = DirectCast(GridView1.Rows(i).FindControl("ListPrice"), Label).Text()
            Dim Qty3 As Label = DirectCast(GridView1.Rows(i).FindControl("Amount"), Label)
            Dim Qty4 As Label = DirectCast(GridView1.Rows(i).FindControl("Total"), Label)
            sumQty = Qty1 * Qty2
            Qty3.Text = FormatNumber(sumQty, 2)
'เพิ่ม
            sumTotal += sumQty 
            Qty4.Text = FormatNumber(sumTotal, 2)
        Next

    End Sub

ใน Gridview 
ปรกกาศตัวแปร  public ไว้บนสุดใต้ Class
 Dim sumTotal As Decimal = 0 

 <asp:TemplateField HeaderText="Amount">
                                      <FooterTemplate>
                                        <asp:Label ID="LblTotalAmount" runat="server" Width="100%" CssClass="text-right"></asp:Label>
                                    </FooterTemplate>
                                    <ItemTemplate>
                                        <asp:Label ID="LblAmount" runat="server" Width="100%"  CssClass="text-right" 
                                            Text='<%# DataBinder.Eval(Container, "DataItem.Amount") %>'></asp:Label>
                                    </ItemTemplate>
                                    <HeaderStyle Width="10%" />
   </asp:TemplateField>


 Private Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound

   If e.Row.RowType = DataControlRowType.DataRow Then
  Dim LblAmount As Label = CType(e.Row.FindControl("LblAmount "), Label)
   sumTotal+= CDec(LblAmount .Text)
   End Sub

If e.Row.RowType = DataControlRowType.Footer Then
            Dim LblTotalAmount As Label = CType(e.Row.FindControl("LblTotalAmount "), Label)
              LblTotalAmount .Text = sumTotal.ToString("N2")
        End If

 End Sub

Dim sumTotal As Decimal = 0
    Private Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound

        Dim sumQty As Double
        For i As Integer = 0 To GridView1.Rows.Count - 1
            Dim Qty1 As Double = DirectCast(GridView1.Rows(i).FindControl("lblQuantity"), Label).Text()
            Dim Qty2 As Double = DirectCast(GridView1.Rows(i).FindControl("lblListPrice"), Label).Text()
            Dim Qty3 As Label = DirectCast(GridView1.Rows(i).FindControl("lblAmount"), Label)
            Dim Qty4 As Label = DirectCast(GridView1.Rows(i).FindControl("lblTotal"), Label)
            sumQty = Qty1 * Qty2
            Qty3.Text = FormatNumber(sumQty, 2)

            If e.Row.RowType = DataControlRowType.DataRow Then
                Dim LblAmount As Label = CType(e.Row.FindControl("LblAmount "), Label)
                sumTotal += CDec(lblAmount.Text)
            End If

            If e.Row.RowType = DataControlRowType.Footer Then
                Dim LblTotal As Label = CType(e.Row.FindControl("LblTotal"), Label)
                LblTotal.Text = sumTotal.ToString("N2")
            End If

        Next
    End Sub
End Class

<asp:TemplateField HeaderText="Amount">
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox29" runat="server"></asp:TextBox>
                            </EditItemTemplate>
                            <FooterTemplate>
                                <asp:Label ID="LblTotal" runat="server"></asp:Label>
                            </FooterTemplate>
                            <ItemTemplate>
                                <asp:Label ID="LblAmount" runat="server"></asp:Label>
                            </ItemTemplate>
                        </asp:TemplateField>

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
                    BackColor="#DEBA84" BorderColor="#DEBA84" BorderStyle="None" BorderWidth="1px" 
                    CellPadding="3" CellSpacing="2" Height="254px" style="text-align: center" 
                    Width="774px">
                    <RowStyle BackColor="#FFF7E7" ForeColor="#8C4510" />
                    <Columns>
                        <asp:TemplateField HeaderText="LINE">
                            <ItemTemplate>
                                <asp:Label ID="lblLine" runat="server" Text='<%# Eval("UNPD_LINECon") %>'></asp:Label>
                            </ItemTemplate>
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox28" runat="server"></asp:TextBox>
                            </EditItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="DOC">
                            <ItemTemplate>
                                <asp:Label ID="lblDOC" runat="server" Text='<%# Eval("UNP_DOCCon") %>'></asp:Label>
                            </ItemTemplate>
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox27" runat="server"></asp:TextBox>
                            </EditItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="INVOICENO">
                            <ItemTemplate>
                                <asp:Label ID="lblInvoiceNo" runat="server" Text='<%# Eval("UNP_INV_NOCon") %>'></asp:Label>
                            </ItemTemplate>
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox26" runat="server"></asp:TextBox>
                            </EditItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="INVOICEDATE">
                            <ItemTemplate>
                                <asp:Label ID="lblInvoiceDate" runat="server" 
                                    Text='<%# Eval("UNP_INV_DATECon") %>'></asp:Label>
                            </ItemTemplate>
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox25" runat="server"></asp:TextBox>
                            </EditItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="SHIPDATE">
                            <ItemTemplate>
                                <asp:Label ID="lblShipDate" runat="server" Text='<%# Eval("UNP_SHP_DATECon") %>'></asp:Label>
                            </ItemTemplate>
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox24" runat="server"></asp:TextBox>
                            </EditItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="PORT OF DESTINATION">
                            <ItemTemplate>
                                <asp:Label ID="lblPortofDes" runat="server" Text='<%# Eval("UNP_PORTCon") %>'></asp:Label>
                            </ItemTemplate>
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox23" runat="server"></asp:TextBox>
                            </EditItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="TRADETERM">
                            <ItemTemplate>
                                <asp:Label ID="lblTradeTerm" runat="server" 
                                    Text='<%# Eval("UNP_TRADE_TERMCon") %>'></asp:Label>
                            </ItemTemplate>
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox22" runat="server"></asp:TextBox>
                            </EditItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="MODE">
                            <ItemTemplate>
                                <asp:Label ID="lblMode" runat="server" Text='<%# Eval("UNP_MODECon") %>'></asp:Label>
                            </ItemTemplate>
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox21" runat="server"></asp:TextBox>
                            </EditItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="BILLTO">
                            <ItemTemplate>
                                <asp:Label ID="lblBillTo" runat="server" Text='<%# Eval("UNP_BILLTOCon") %>'></asp:Label>
                            </ItemTemplate>
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox20" runat="server"></asp:TextBox>
                            </EditItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="SHIPTO">
                            <ItemTemplate>
                                <asp:Label ID="lblShipto" runat="server" Text='<%# Eval("UNP_SHIPTOCon") %>'></asp:Label>
                            </ItemTemplate>
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox19" runat="server"></asp:TextBox>
                            </EditItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="PROJECT">
                            <ItemTemplate>
                                <asp:Label ID="lblProject" runat="server" Text='<%# Eval("UNP_PROJECTCon") %>'></asp:Label>
                            </ItemTemplate>
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox18" runat="server"></asp:TextBox>
                            </EditItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="CURRENCY">
                            <ItemTemplate>
                                <asp:Label ID="lblCurrency" runat="server" Text='<%# Eval("UNP_CURRENCYCon") %>'></asp:Label>
                            </ItemTemplate>
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox17" runat="server"></asp:TextBox>
                            </EditItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="REMARK">
                            <ItemTemplate>
                                <asp:Label ID="lblRemark" runat="server" Text='<%# Eval("UNP_REMARKCon") %>'></asp:Label>
                            </ItemTemplate>
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox16" runat="server"></asp:TextBox>
                            </EditItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="DESCRIPTION2">
                            <ItemTemplate>
                                <asp:Label ID="lblDescription2" runat="server" 
                                    Text='<%# Eval("UNP_DESCRIPTION2Con") %>'></asp:Label>
                            </ItemTemplate>
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox15" runat="server"></asp:TextBox>
                            </EditItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="DESCRIPTION1">
                            <ItemTemplate>
                                <asp:Label ID="lblDescription1" runat="server" 
                                    Text='<%# Eval("UNPD_DESCRIPTION1Con") %>'></asp:Label>
                            </ItemTemplate>
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox14" runat="server"></asp:TextBox>
                            </EditItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="FREIGHT">
                            <ItemTemplate>
                                <asp:Label ID="lblFreight" runat="server" Text='<%# Eval("UNP_FREIGHTCon") %>'></asp:Label>
                            </ItemTemplate>
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox12" runat="server"></asp:TextBox>
                            </EditItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="INSURANCE">
                            <ItemTemplate>
                                <asp:Label ID="lblInsurance" runat="server" Text='<%# Eval("UNP_INSURANCECon") %>'></asp:Label>
                            </ItemTemplate>
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox11" runat="server"></asp:TextBox>
                            </EditItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="QUANTITY">
                            <ItemTemplate>
                                <asp:Label ID="lblQuantity" runat="server" Text='<%# Eval("UNPD_QTYCon") %>'></asp:Label>
                            </ItemTemplate>
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
                            </EditItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="LIST PRICE">
                            <ItemTemplate>
                                <asp:Label ID="lblListPrice" runat="server" 
                                    Text='<%# Eval("UNPD_LIST_PRICECon") %>'></asp:Label>
                            </ItemTemplate>
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox9" runat="server"></asp:TextBox>
                            </EditItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="UM">
                            <ItemTemplate>
                                <asp:Label ID="lblUm" runat="server" Text='<%# Eval("UNPD_UMCon") %>'></asp:Label>
                            </ItemTemplate>
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox7" runat="server"></asp:TextBox>
                            </EditItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="PACKAGE">
                            <ItemTemplate>
                                <asp:Label ID="lblPackage" runat="server" Text='<%# Eval("UNPD_PACKAGECon") %>'></asp:Label>
                            </ItemTemplate>
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox8" runat="server"></asp:TextBox>
                            </EditItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="NW">
                            <ItemTemplate>
                                <asp:Label ID="lblNw" runat="server" Text='<%# Eval("UNPD_NWCon") %>'></asp:Label>
                            </ItemTemplate>
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox6" runat="server"></asp:TextBox>
                            </EditItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="GW">
                            <ItemTemplate>
                                <asp:Label ID="lblGw" runat="server" Text='<%# Eval("UNPD_GWCon") %>'></asp:Label>
                            </ItemTemplate>
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox5" runat="server"></asp:TextBox>
                            </EditItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="PER PACK">
                            <ItemTemplate>
                                <asp:Label ID="lblPerPack" runat="server" Text='<%# Eval("UNPD_PER_PACKCon") %>'></asp:Label>
                            </ItemTemplate>
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>
                            </EditItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="DIMENSION">
                            <ItemTemplate>
                                <asp:Label ID="lblDimension" runat="server" 
                                    Text='<%# Eval("UNPD_DIMENSIONCon") %>'></asp:Label>
                            </ItemTemplate>
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox4" runat="server"></asp:TextBox>
                            </EditItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="Amount">
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox29" runat="server"></asp:TextBox>
                            </EditItemTemplate>
                            <FooterTemplate>
                                <asp:Label ID="LblTotal" runat="server"></asp:Label>
                            </FooterTemplate>
                            <ItemTemplate>
                                <asp:Label ID="LblAmount" runat="server"></asp:Label>
                            </ItemTemplate>
                        </asp:TemplateField>
                    </Columns>
                    <FooterStyle BackColor="#F7DFB5" ForeColor="#8C4510" />
                    <PagerStyle ForeColor="#8C4510" HorizontalAlign="Center" />
                    <SelectedRowStyle BackColor="#738A9C" Font-Bold="True" ForeColor="White" />
                    <HeaderStyle BackColor="#A55129" Font-Bold="True" ForeColor="White" />
                </asp:GridView>


'Gridview
                    Dim dtGV As DataTable
                    Dim dtcon As DataTable = New DataTable()
                    Dim messageerror As String = ""
                    dtGV = GridImp(docnoGV)

                    If dtGV.Rows.Count > 0 Then
                        '....Headmstr.....
                        Dim UNP_FACTORYCon As String = ""
                        Dim UNP_DOCCon As String = ""
                        Dim UNP_REVCon As String = ""
                        Dim UNP_NSEQCon As String = ""
                        Dim STATUSCon As String = ""
                        Dim UNP_INV_NOCon As String = ""
                        Dim UNP_INV_DATECon As String = ""
                        Dim UNP_SHP_DATECon As String = ""
                        Dim UNP_PORTCon As String = ""
                        Dim UNP_TRADE_TERMCon As String = ""
                        Dim UNP_MODECon As String = ""
                        Dim UNP_BILLTOCon As String = ""
                        Dim UNP_BILL_ATTENTIONCon As String = ""
                        Dim UNP_SHIPTOCon As String = ""
                        Dim UNP_SHIP_ATTENTIONCon As String = ""
                        Dim UNP_SHIP_ATTENTION2Con As String = ""
                        Dim UNP_FORWARDERCon As String = ""
                        Dim UNP_ACCOUNTCon As String = ""
                        Dim UNP_PROJECTCon As String = ""
                        Dim UNP_CURRENCYCon As String = ""
                        Dim UNP_CASEMASKCon As String = ""
                        Dim UNP_REMARKCon As String = ""
                        Dim UNP_DESCRIPTION2Con As String = ""
                        Dim UNP_REQUESTERCon As String = ""
                        Dim UNP_COMMERCIALCon As String = ""
                        Dim UNP_FREIGHTCon As Double = 0
                        Dim UNP_INSURANCECon As Double = 0
                        Dim UNP_DOMAINCon As String = ""
                        Dim UNP_PURPOSECon As String = ""
                        Dim UNP_RE_IMPORTCon As String = ""
                        Dim UNP_RETURNCon As String = ""
                        Dim UNP_BOICon As String = ""
                        Dim UNP_REQ_PACKCon As String = ""
                        Dim UNP_INCLUDE_VATCon As String = ""
                        Dim USERCon As String = ""

                        '.....Detail....
                        Dim UNPD_LINECon As Integer = 0
                        Dim UNPD_DESCRIPTION1Con As String = ""
                        'Dim UNPD_ITEM_CODECon As String = ""
                        'Dim UNPD_INVCon As String = ""
                        'Dim UNPD_POCon As String = ""
                        Dim UNPD_CLAIM_NOCon As String = ""
                        'Dim UNPD_SERIAL_NOCon As String = ""
                        'Dim UNPD_ASSET_NOCon As String = ""
                        Dim UNPD_QTYCon As Double = 0
                        Dim UNPD_LIST_PRICECon As Double = 0
                        Dim UNPD_UMCon As String = ""
                        Dim UNPD_PACKAGECon As String = ""
                        Dim UNPD_NWCon As String = ""
                        Dim UNPD_GWCon As String = ""
                        Dim UNPD_PER_PACKCon As String = ""
                        Dim UNPD_DIMENSIONCon As String = ""
                        'Dim UNPD_PACK_DESCCon As String = ""

                        'Dim UNPD_NOBOICon As String = ""
                        'Dim UNPD_QTYBOICon As String = ""
                        'Dim UNPD_UMBOICon As String = ""

                        '....Headmstr......
                        Dim drcon As DataRow
                        dtcon.Columns.Add(New DataColumn("UNP_FACTORY", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_DOCCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_REVCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_NSEQCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("STATUSCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_INV_NOCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_INV_DATECon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_SHP_DATECon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_PORTCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_TRADE_TERMCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_MODECon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_BILLTOCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_BILL_ATTENTIONCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_SHIPTOCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_SHIP_ATTENTIONCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_SHIP_ATTENTION2Con", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_FORWARDERCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_ACCOUNTCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_PROJECTCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_CURRENCYCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_CASEMASKCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_REMARKCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_DESCRIPTION2Con", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_REQUESTERCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_COMMERCIALCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_FREIGHTCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_INSURANCECon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_DOMAINCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_PURPOSECon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_RE_IMPORTCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_RETURNCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_BOICon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_REQ_PACKCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNP_INCLUDE_VATCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("USERCon", GetType(String)))

                        '...Detail.....
                        'dtcon.Columns.Add(New DataColumn("UNP_FACTORYCon", GetType(String)))
                        'dtcon.Columns.Add(New DataColumn("UNP_DOCCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNPD_LINECon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNPD_DESCRIPTION1Con", GetType(String)))
                        'dtcon.Columns.Add(New DataColumn("UNPD_ITEM_CODECon", GetType(String)))
                        'dtcon.Columns.Add(New DataColumn("UNPD_INVCon", GetType(String)))
                        'dtcon.Columns.Add(New DataColumn("UNPD_POCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNPD_CLAIM_NOCon", GetType(String)))
                        'dtcon.Columns.Add(New DataColumn("UNPD_SERIAL_NOCon", GetType(String)))
                        'dtcon.Columns.Add(New DataColumn("UNPD_ASSET_NOCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNPD_QTYCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNPD_LIST_PRICECon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNPD_UMCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNPD_PACKAGECon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNPD_NWCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNPD_GWCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNPD_PER_PACKCon", GetType(String)))
                        dtcon.Columns.Add(New DataColumn("UNPD_DIMENSIONCon", GetType(String)))
                        'dtcon.Columns.Add(New DataColumn("UNPD_PACK_DESCCon", GetType(String)))

                        'dtcon.Columns.Add(New DataColumn("UNPD_NOBOICon", GetType(String)))
                        'dtcon.Columns.Add(New DataColumn("UNPD_QTYBOICon", GetType(String)))
                        'dtcon.Columns.Add(New DataColumn("UNPD_UMBOICon", GetType(String)))

                        For i As Integer = 0 To dtGV.Rows.Count - 1

                            '....Head......
                            UNPD_LINECon = dtGV.Rows(i).Item("UNPD_LINE")
                            'UNP_FACTORYCon = dtGV.Rows(i).Item("UNP_FACTORY")
                            UNP_DOCCon = dtGV.Rows(i).Item("UNP_DOC")
                            UNP_REVCon = dtGV.Rows(i).Item("UNP_REV")
                            UNP_NSEQCon = dtGV.Rows(i).Item("UNP_NSEQ")
                            STATUSCon = dtGV.Rows(i).Item("UNP_STAT_DET")
                            UNP_INV_NOCon = dtGV.Rows(i).Item("UNP_INV_NO")
                            UNP_INV_DATECon = dtGV.Rows(i).Item("UNP_INV_DATE")
                            UNP_SHP_DATECon = dtGV.Rows(i).Item("UNP_SHP_DATE")
                            UNP_PORTCon = dtGV.Rows(i).Item("UNP_PORT")
                            UNP_TRADE_TERMCon = dtGV.Rows(i).Item("UNP_TRADE_TERM")
                            UNP_MODECon = dtGV.Rows(i).Item("UNP_MODE")
                            UNP_BILLTOCon = dtGV.Rows(i).Item("UNP_BILLTO")
                            UNP_BILL_ATTENTIONCon = dtGV.Rows(i).Item("UNP_BILL_ATTENTION")
                            UNP_SHIPTOCon = dtGV.Rows(i).Item("UNP_SHIPTO")
                            UNP_SHIP_ATTENTIONCon = dtGV.Rows(i).Item("UNP_SHIP_ATTENTION")
                            UNP_SHIP_ATTENTION2Con = dtGV.Rows(i).Item("UNP_SHIP_ATTENTION2")
                            UNP_FORWARDERCon = dtGV.Rows(i).Item("UNP_FORWARDER")
                            UNP_ACCOUNTCon = dtGV.Rows(i).Item("UNP_ACCOUNT")
                            UNP_PROJECTCon = dtGV.Rows(i).Item("UNP_PROJECT")
                            UNP_CURRENCYCon = dtGV.Rows(i).Item("UNP_CURRENCY")
                            UNP_CASEMASKCon = dtGV.Rows(i).Item("UNP_CASEMASK")
                            UNP_REMARKCon = dtGV.Rows(i).Item("UNP_REMARK")
                            UNP_DESCRIPTION2Con = dtGV.Rows(i).Item("UNP_DESCRIPTION2")
                            UNP_REQUESTERCon = dtGV.Rows(i).Item("UNP_REQUESTER")
                            UNP_COMMERCIALCon = dtGV.Rows(i).Item("UNP_COMMERCIAL")
                            UNP_FREIGHTCon = dtGV.Rows(i).Item("UNP_FREIGHT")
                            UNP_INSURANCECon = dtGV.Rows(i).Item("UNP_INSURANCE")
                            UNP_DOMAINCon = dtGV.Rows(i).Item("UNP_DOMAIN")
                            UNP_PURPOSECon = dtGV.Rows(i).Item("UNP_PURPOSE")
                            UNP_RE_IMPORTCon = dtGV.Rows(i).Item("UNP_RE_IMPORT")
                            UNP_RETURNCon = dtGV.Rows(i).Item("UNP_RETURN")
                            UNP_BOICon = dtGV.Rows(i).Item("UNP_BOI")
                            UNP_REQ_PACKCon = dtGV.Rows(i).Item("UNP_REQ_PACK")
                            UNP_INCLUDE_VATCon = dtGV.Rows(i).Item("UNP_INCLUDE_VAT")

                            '....Detail......
                            'UNPD_LINECon = dtGV.Rows(i).Item("UNPD_LINE")
                            UNPD_DESCRIPTION1Con = dtGV.Rows(i).Item("UNPD_DESCRIPTION1")
                            'UNPD_ITEM_CODECon = dtGV.Rows(i).Item("UNPD_ITEM_CODE")
                            'UNPD_INVCon = dtGV.Rows(i).Item("UNPD_INV")
                            'UNPD_POCon = dtGV.Rows(i).Item("UNPD_PO")
                            UNPD_CLAIM_NOCon = dtGV.Rows(i).Item("UNPD_CLAIM_NO")
                            'UNPD_SERIAL_NOCon = dtGV.Rows(i).Item("UNPD_SERIAL_NO")
                            'UNPD_ASSET_NOCon = dtGV.Rows(i).Item("UNPD_ASSET_NO")
                            UNPD_QTYCon = dtGV.Rows(i).Item("UNPD_QTY")
                            UNPD_LIST_PRICECon = dtGV.Rows(i).Item("UNPD_LIST_PRICE")
                            UNPD_UMCon = dtGV.Rows(i).Item("UNPD_UM")
                            UNPD_PACKAGECon = dtGV.Rows(i).Item("UNPD_PACKAGE")
                            UNPD_NWCon = dtGV.Rows(i).Item("UNPD_NW")
                            UNPD_GWCon = dtGV.Rows(i).Item("UNPD_GW")
                            UNPD_PER_PACKCon = dtGV.Rows(i).Item("UNPD_PER_PACK")
                            UNPD_DIMENSIONCon = dtGV.Rows(i).Item("UNPD_DIMENSION")
                            'UNPD_PACK_DESCCon = dtGV.Rows(i).Item("UNPD_PACK_DESC")

                            'UNPD_NOBOICon2 = dtGV.Rows(i).Item("UNPD_NOBOI")
                            'UNPD_QTYBOICon2 = dtGV.Rows(i).Item("UNPD_QTYBOI")
                            'UNPD_UMBOICon2 = dtGV.Rows(i).Item("UNPD_UMBOI")

                            drcon = dtcon.NewRow()
                            Dim dtcon1 As DataTable = gPartofDescheck(UNP_PORTCon)
                            If dtcon1.Rows.Count > 0 Then
                                UNP_PORTCon = dtcon1.Rows.Item(0).Item("code_cmmt").ToString()
                            End If

                            Dim dtcon2 As DataTable = checkTrade1impcon(UNP_TRADE_TERMCon)
                            If dtcon2.Rows.Count > 0 Then
                                UNP_TRADE_TERMCon = dtcon2.Rows.Item(0).Item("code_cmmt").ToString()
                            End If

                            '....Head.....
                            drcon("UNPD_LINECon") = UNPD_LINECon
                            'drcon("UNP_FACTORYCon") = UNP_FACTORYCon
                            drcon("UNP_DOCCon") = UNP_DOCCon
                            'drcon("UNP_REVCon") = UNP_REVCon
                            'drcon("UNP_NSEQCon") = UNP_NSEQCon
                            'drcon("STATUSCon") = STATUSCon
                            drcon("UNP_INV_NOCon") = UNP_INV_NOCon
                            drcon("UNP_INV_DATECon") = UNP_INV_DATECon
                            drcon("UNP_SHP_DATECon") = UNP_SHP_DATECon
                            drcon("UNP_PORTCon") = UNP_PORTCon
                            drcon("UNP_TRADE_TERMCon") = UNP_TRADE_TERMCon
                            drcon("UNP_MODECon") = UNP_MODECon
                            drcon("UNP_BILLTOCon") = UNP_BILLTOCon
                            drcon("UNP_BILL_ATTENTIONCon") = UNP_BILL_ATTENTIONCon
                            drcon("UNP_SHIPTOCon") = UNP_SHIPTOCon
                            drcon("UNP_SHIP_ATTENTIONCon") = UNP_SHIP_ATTENTIONCon
                            drcon("UNP_SHIP_ATTENTION2Con") = UNP_SHIP_ATTENTION2Con
                            'drcon("UNP_FORWARDERCon") = UNP_FORWARDERCon
                            'drcon("UNP_ACCOUNTCon") = UNP_ACCOUNTCon
                            drcon("UNP_PROJECTCon") = UNP_PROJECTCon
                            drcon("UNP_CURRENCYCon") = UNP_CURRENCYCon
                            'drcon("UNP_CASEMASKCon") = UNP_CASEMASKCon
                            drcon("UNP_REMARKCon") = UNP_REMARKCon
                            drcon("UNP_DESCRIPTION2Con") = UNP_DESCRIPTION2Con
                            'drcon("UNP_REQUESTERCon") = UNP_REQUESTERCon
                            'drcon("UNP_COMMERCIALCon") = UNP_COMMERCIALCon
                            drcon("UNP_FREIGHTCon") = UNP_FREIGHTCon
                            drcon("UNP_INSURANCECon") = UNP_INSURANCECon
                            'drcon("UNP_DOMAINCon") = UNP_DOMAINCon
                            'drcon("UNP_PURPOSECon") = UNP_PURPOSECon
                            'drcon("UNP_RE_IMPORTCon") = UNP_RE_IMPORTCon
                            'drcon("UNP_RETURNCon") = UNP_RETURNCon
                            'drcon("UNP_BOICon") = UNP_BOICon
                            'drcon("UNP_REQ_PACKCon") = UNP_REQ_PACKCon
                            'drcon("UNP_INCLUDE_VATCon") = UNP_INCLUDE_VATCon
                            'drcon("USERCon") = USERCon

                            '....Detail......
                            'drcon = dtcon.NewRow()
                            'drcon("UNPD_LINECon") = UNPD_LINECon
                            drcon("UNPD_DESCRIPTION1Con") = UNPD_DESCRIPTION1Con
                            'drcon("UNPD_ITEM_CODECon") = UNPD_ITEM_CODECon
                            'drcon("UNPD_INVCon") = UNPD_INVCon
                            'drcon("UNPD_POCon") = UNPD_POCon
                            drcon("UNPD_CLAIM_NOCon") = UNPD_CLAIM_NOCon
                            'drcon("UNPD_SERIAL_NOCon") = UNPD_SERIAL_NOCon
                            'drcon("UNPD_ASSET_NOCon") = UNPD_ASSET_NOCon
                            drcon("UNPD_QTYCon") = UNPD_QTYCon
                            drcon("UNPD_LIST_PRICECon") = UNPD_LIST_PRICECon
                            drcon("UNPD_UMCon") = UNPD_UMCon
                            drcon("UNPD_PACKAGECon") = UNPD_PACKAGECon
                            drcon("UNPD_NWCon") = UNPD_NWCon
                            drcon("UNPD_GWCon") = UNPD_GWCon
                            drcon("UNPD_PER_PACKCon") = UNPD_PER_PACKCon
                            drcon("UNPD_DIMENSIONCon") = UNPD_DIMENSIONCon
                            'drcon("UNPD_PACK_DESCCon") = UNPD_PACK_DESCCon

                            'drcon("UNPD_NOBOICon") = UNPD_NOBOICon
                            'drcon("UNPD_QTYBOICon") = UNPD_QTYBOICon
                            'drcon("UNPD_UMBOICon") = UNPD_UMBOICon
                            dtcon.Rows.Add(drcon)

                        Next

                        Me.GridView1.DataSource = dtcon
                        GridView1.DataBind()

                    Else
                        GridView1.DataBind()
                    End If

Dim sumTotal As Double
                Dim sumQty As Double
                For u As Integer = 0 To GridView1.Rows.Count - 1
                    Dim Qty1 As Double = DirectCast(GridView1.Rows(u).FindControl("lblQuantity"), Label).Text()
                    Dim Qty2 As Double = DirectCast(GridView1.Rows(u).FindControl("lblListPrice"), Label).Text()
                    Dim Qty3 As Label = DirectCast(GridView1.Rows(u).FindControl("lblAmount"), Label)
                    Dim Qty4 As Label = DirectCast(GridView1.FooterRow.FindControl("lblTotal"), Label)
                    sumQty = Qty1 * Qty2
                    Qty3.Text = FormatNumber(sumQty, 2)

                    sumTotal += CDbl(Qty3.Text)
                    Qty4.Text = sumTotal
                Next