lazy loading problem in primary key for next loaded data primary key not shows properly

 <asp:Repeater ID="rptAssets" runat="server">
                                    <HeaderTemplate>
                                    </HeaderTemplate>
                                    <ItemTemplate>
                                        <div id="dvAssetsDetails" class="assetDetails">
                                            <h3><i id="iFav" class='<%#DataBinder.Eval(Container.DataItem,"AssetFavourites")%>' onclick="myFav('<%#DataBinder.Eval(Container.DataItem,"Assetid")%>', '<%#DataBinder.Eval(Container.DataItem,"AssetFavourites")%>')"></i>

                                                
                                                    <p onclick="loadingRighPanal('<%#DataBinder.Eval(Container.DataItem,"Assetid")%>')" style="padding-left: 13px" id="description"><%#DataBinder.Eval(Container.DataItem,"Description")%> </p>

                                                <strong id="assetCode"><%#DataBinder.Eval(Container.DataItem,"AssetCode")%>'</strong>
                                            </h3>

                                            <span>
                                                <i id="ivbStatus" class='<%#DataBinder.Eval(Container.DataItem,"VibrationStatus")%>'></i>
                                                <i id="iperStatus" class='<%#DataBinder.Eval(Container.DataItem,"PerformanceStatus")%>'></i>
                                                <i id="ioilStatus" class='<%#DataBinder.Eval(Container.DataItem,"OilStatus")%>'></i>
                                                <i id="issStatus" class='<%#DataBinder.Eval(Container.DataItem,"StartStopStatus")%>'></i>
                                                <p id="location"><%#DataBinder.Eval(Container.DataItem,"Location")%></p>
                                            </span>
                                        </div>
                                                                    

                                       
                                    </ItemTemplate>
                                </asp:Repeater>

  var xmlDoc = $.parseXML(response.d);
            var xml = $(xmlDoc);
            pageCount = parseInt(xml.find("PageCount").eq(0).find("PageCount").text());
            var customers = xml.find("AssetSummary");
            customers.each(function () {

                var customer = $(this);
                var table = $("#ExtraDiv .assetDetails").eq(0).clone(true);
   $("#assetCode", table).html(customer.find("AssetCode").text());
                $("#location", table).html(customer.find("Location").text());

                $("#ExtraDiv").append(table).append("<br />");

            });

  public static List<AssetSummary> GetCustomersData(int startIndex, int endIndex)
        {
            return GetData(startIndex, endIndex);
        }
        private static List<AssetSummary> GetData(int startIndex, int endIndex) //SqlCommand cmd
        {
            return LoadAssetInfo.GetAssetInfo(startIndex, endIndex);
        }

        [WebMethod]
        public static string GetCustomers(int pageIndex)
        {
            int endIndex = pageIndex * 10;
            int startIndex = endIndex - 10;

            return XmlSerialize(GetCustomersData(startIndex, endIndex));
        }

        public static string XmlSerialize(List<AssetSummary> emps)
        {
            System.Xml.Serialization.XmlSerializer xmlSer = new System.Xml.Serialization.XmlSerializer(emps.GetType());
            StringWriter textWriter = new StringWriter();
            xmlSer.Serialize(textWriter, emps);
            xmlSer = null;
            return textWriter.ToString();
        }