Save a gridview data which is inside another gridview's Rowdatabound

Hi Experts,

I have a gridview. one of its column has s plus sign. When I click the plus sign it makes the other gridview visible . When I click the minus sign it is invisible. Is there anyway I can save the data of the popup gridview in a dataset or a datatable when the minus sign is clicked. I have attached the screenshots.

Thanks in advance.


Code for + and -
----------------------------

 <script  type="text/javascript" src="Jqueries/jquery_nestedGrid.min.js"></script>
     <script type="text/javascript">
         $("[src*=plus]").live("click", function () {
             $(this).closest("tr").after("<tr><td></td><td colspan = '900'>" + $(this).next().html() + "</td></tr>")
             $(this).attr("src", "images/minus.png");
             
         });
         $("[src*=minus]").live("click", function () {
             $(this).attr("src", "images/plus.png");
             $(this).closest("tr").next().remove();
         });
     </script>


Gridview column
---------------------------
  <asp:TemplateField ItemStyle-Width="4%">
                    <ItemTemplate>
                        <asp:image alt = "" style="cursor: pointer;" src="images/plus.png" id="ImgPlusMinus" runat="server" />
                        <asp:Panel ID="pnlOrders" runat="server" Style="display: none">
                            <asp:GridView ID="gvVendors" runat="server" AutoGenerateColumns="false" CssClass = "ChildGrid SetLeftMarginChildGrid">
                                <Columns>
                                    <asp:BoundField DataField="VendorID" HeaderText="ID" visible="false" />
                                    <asp:BoundField ItemStyle-Width="300px" DataField="VendorName" HeaderText="Vendor" />
                                    <asp:BoundField ItemStyle-Width="100px" DataField="PartCost" HeaderText="Part Cost" />
                                    <asp:BoundField ItemStyle-Width="200px" DataField="PreferredVendor" HeaderText="Preferred Vendor" />
                                     <asp:TemplateField HeaderText="Qty. Ordered">
                                        <HeaderStyle Width="110px" HorizontalAlign="Left"/>
                                        <ItemStyle Width="50px" HorizontalAlign="Left"/>
                                        <ItemTemplate>
                                            <asp:textbox ID="txtQtyOrdered" runat="server" Width ="100px"></asp:textbox>
                                        </ItemTemplate>
                                    </asp:TemplateField>
                                </Columns>
                            </asp:GridView>
                        </asp:Panel>
                    </ItemTemplate>
                </asp:TemplateField>
Vendor1.png
Vendor2.png