我有一个UserControl，它是一个嵌套的GridView（facebook就像墙），我想在向下滚动时加载帖子。我正在关注这篇文章.. CLICK ME
问题是此方法使用第一列的最后一行来获取最后一个产品 像这样的东西
var lastProductId = $("#GridViewUserScraps tr:last").children("td:first").html();
但在我的情况下，我没有在UserControl的GridView的任何列中显示任何id，尽管我在数据库中有一个ScrapId列（主键）。如何在向下滚动时加载帖子？我怎样才能使它发挥作用？
我的UserControl：
<div id="divProducts" style="height:700px;overflow:auto">
<asp:GridView ID="GridViewUserScraps" ItemStyle-VerticalAlign="Top" AutoGenerateColumns="False"
GridLines="None" Width="100%" ShowHeader="False" runat="server" AlternatingRowStyle-BackColor="#A5A5A5"
CellPadding="4" ForeColor="#333333" DataKeyNames="ScrapId" OnRowCommand="GridViewRowCommand">
<Columns>
<asp:TemplateField>
<FooterTemplate>
<asp:LinkButton ID="LinkButton1" runat="server">Load More</asp:LinkButton>
</FooterTemplate>
<ItemTemplate>
<table align="left" cellpadding="1" cellspacing="2">
<tr>
<td>
<a href='<%#getUserHREF(Container.DataItem)%>'>
<img align="middle" src='<%#getSRC(Container.DataItem)%>' border="0" width="50px" /></a>
</td>
<td>
</td>
</tr>
</table>
<div align="justify">
<b>
<%#DataBinder.Eval(Container.DataItem,"firstname")%>
<div>
<asp:HiddenField ID="hiddenLastProductID" runat="server" Value='<%# Eval("id") %>' />
</div>
</b>
<br />
<%#DataBinder.Eval(Container.DataItem, "Message")%>
<br />
<asp:Image ID="Image" runat="server" ImageUrl='<%# Eval("url") %>' style="max-width:500px;" />
</div>
<span class="SmallBlackText">Posted On: </span>
<asp:Label ID="lblSendDate" runat="server" Text='<%#DataBinder.Eval(Container.DataItem,"SendDate")%>'></asp:Label>
</span>
<br />
<%-- <asp:LinkButton ID="lnklike" runat="server"
CommandArgument="<%# ((GridViewRow) Container).RowIndex %>"
CommandName="LikeCmd">Like</asp:LinkButton>
<asp:LinkButton ID="lnkunlike" runat="server">unlike</asp:LinkButton>--%>
<asp:ImageButton ID="lnklike" runat="server" ImageUrl="~/Images/thumbsup.png" Height="20px"
Width="20px" CommandName="like" CommandArgument='<%# Eval("ScrapId")%>' />
<asp:UpdatePanel runat="server" ID="UpdatePanel" UpdateMode="Conditional">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="lnklike" EventName="Click" />
</Triggers>
<ContentTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Controls_GetUserScraps.abc((int)Eval("ScrapId")) %>' />
</ContentTemplate>
</asp:UpdatePanel>
<%--<asp:Label ID="Label1" runat="server" Text='<%# WebPageName.StaticMethodName((int)Eval("ScrapId")) %>' />--%>
<asp:ImageButton ID="lnkunlike" runat="server" CommandArgument='<%# Eval("ScrapId")%>'
CommandName="unlike" Height="20px" ImageUrl="~/Images/thumbsdown.png" Width="20px" />
<asp:UpdatePanel runat="server" ID="UpdatePanel2" UpdateMode="Conditional">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="lnkunlike" EventName="Click" />
</Triggers>
<ContentTemplate>
<asp:Label ID="Label2" runat="server" Text='<%# Controls_GetUserScraps.xyz((int)Eval("ScrapId")) %>'></asp:Label>
</ContentTemplate>
</asp:UpdatePanel>
<asp:LinkButton ID="lnkcomment" runat="server">Comment</asp:LinkButton>
<asp:LinkButton ID="lnkviewall" runat="server" CommandName="viewall" CommandArgument='<%# Eval("ScrapId")%>'>View All</asp:LinkButton>
<br />
<asp:Panel ID="Pnlchildgrid" runat="server">
<asp:GridView ID="childgrid" runat="server" AutoGenerateColumns="False" OnRowCommand="childgrid_RowCommand"
Style="width: 450px; float: right;">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<table align="left" cellpadding="1" cellspacing="2">
<tr>
<td>
<a href='<%#getUserHREF(Container.DataItem)%>'>
<img align="middle" src='<%#getSRC(Container.DataItem)%>' border="0" width="30px" /></a>
</td>
<td>
</td>
</tr>
</table>
<div align="justify">
<b>
<%#DataBinder.Eval(Container.DataItem, "firstname")%></b><br />
<%#DataBinder.Eval(Container.DataItem, "commentmsg")%>
<br />
</div>
<span class="SmallBlackText">Posted On: </span>
<asp:Label ID="lblSendDate" runat="server" Text='<%#DataBinder.Eval(Container.DataItem,"SendDate")%>'></asp:Label>
</span>
<br />
<asp:ImageButton ID="lnklike" runat="server" Height="20" Width="20" CommandName="childlike"
CommandArgument='<%# Eval("commentid")%>' ImageUrl="~/Images/thumbsup.png" />
<asp:Label ID="Label1" runat="server" Text='<%# Controls_GetUserScraps.abc1((int)Eval("commentid")) %>' />
<asp:ImageButton ID="lnkunlike" runat="server" CommandArgument='<%# Eval("commentid")%>'
CommandName="childunlike" Height="20" ImageUrl="~/Images/thumbsdown.png" Width="20" />
<asp:Label ID="Label2" runat="server" Text='<%# Controls_GetUserScraps.xyz1((int)Eval("commentid")) %>'></asp:Label>
<%-- <asp:LinkButton ID="lnkcomment" runat="server">Comment11111</asp:LinkButton>--%>
<br />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<br />
<asp:Panel ID="Panel1" runat="server">
<asp:TextBox ID="txtcomment" runat="server" Width="500px" ></asp:TextBox>
<asp:Button ID="Button1" runat="server" Text="Comment" CommandName="comment" CommandArgument='<%# Eval("ScrapId")%>' />
</asp:Panel>
</asp:Panel>
<br />
</ItemTemplate>
</asp:TemplateField>
</Columns>
<RowStyle BackColor="#EFF3FB" />
<FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
<HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<EditRowStyle BackColor="#2461BF" />
<AlternatingRowStyle BackColor="White" />
</asp:GridView>
</div>