[Solved] Page hangs when populating ASP.Net GridView using jQuery Ajax

I am trying to display records search to the gridview but nothing happens instead my browser hangs

please help

Private Sub BindDummyRow()
    Dim dummy As DataTable = New DataTable()
    dummy.Columns.Add("itemcode")
    dummy.Columns.Add("stockitem")
    dummy.Columns.Add("saleprice")
 
    dummy.Rows.Add()
    gvCustomers.DataSource = dummy
    gvCustomers.DataBind()
    'sample()
End Sub
<System.Web.Services.WebMethod()>
Public Shared Function GetCustomers(ByVal searchTerm As String, ByVal pageIndex As Integer) As String
    Dim query As String = "[GetCustomers_Pager2022]"
    Dim cmd As SqlCommand = New SqlCommand(query)
    cmd.CommandType = CommandType.StoredProcedure
    cmd.Parameters.AddWithValue("@SearchTerm", searchTerm)
    cmd.Parameters.AddWithValue("@PageIndex", pageIndex)
    cmd.Parameters.AddWithValue("@PageSize", 15)
    cmd.Parameters.Add("@RecordCount", SqlDbType.Int, 4).Direction = ParameterDirection.Output
    Return GetData(cmd, pageIndex).GetXml()
End Function
Private Shared Function GetData(ByVal cmd As SqlCommand, ByVal pageIndex As Integer) As DataSet
    Dim strConnString As String = ConfigurationManager.ConnectionStrings("constr").ConnectionString
    Using con As SqlConnection = New SqlConnection(strConnString)
        Using sda As SqlDataAdapter = New SqlDataAdapter()
            cmd.Connection = con
            sda.SelectCommand = cmd
            Using ds As DataSet = New DataSet()
                sda.Fill(ds, "Customers")
                Dim dt As DataTable = New DataTable("Pager")
                dt.Columns.Add("PageIndex")
                dt.Columns.Add("PageSize")
                dt.Columns.Add("RecordCount")
                dt.Rows.Add()
                dt.Rows(0)("PageIndex") = pageIndex
                dt.Rows(0)("PageSize") = 15
                dt.Rows(0)("RecordCount") = cmd.Parameters("@RecordCount").Value
                ds.Tables.Add(dt)
                Return ds
            End Using
        End Using
    End Using
End Function

CREATE PROCEDURE [dbo].[GetCustomers_Pager2022]
      @PageIndex INT = 1
      ,@PageSize INT = 50
      ,@RecordCount INT OUTPUT,
@SearchTerm nvarchar(200)
AS
BEGIN
      SET NOCOUNT ON;
      SELECT IDENTITY(INT,1,1) AS RowNumber
      ,itemcode
      ,[stockitem]
      ,[saleprice]
       
           INTO #Results
      FROM stockcodes
       WHERE      ([stockitem] LIKE @SearchTerm  or [stockitem] LIKE '%'+@SearchTerm+'%' or [stockitem] LIKE '%' + @SearchTerm or [stockitem] LIKE @SearchTerm + '%') OR @SearchTerm = '' OR @SearchTerm = ''
      SELECT @RecordCount = COUNT(*)
      FROM #Results
             
      SELECT * FROM #Results
      WHERE RowNumber BETWEEN(@PageIndex -1) * @PageSize + 1 AND(((@PageIndex -1) * @PageSize + 1) + @PageSize) - 1
       
      DROP TABLE #Results
END

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
     If Not Me.IsPostBack Then
          Me.BindGrid()
         BindDummyRow()
         gvCustomers.DataBind()
     End If
End Sub

<link rel="stylesheet" href="../Scripts/Bootstrap3.3.2.css" />
<script type="text/javascript" src="../Scripts/Jquery1.9.1.min.js"></script>
<script type="text/javascript" src="../Scripts/bootstrap.min.js"></script>    
<script src="../Scripts/ASPSnippets_Pager.min.js"></script>

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">
    <script type="text/javascript">
        $(function () {
            GetCustomers(1);
            $("body").on("keyup", "[id*=txtSearch]", function () {
                GetCustomers(parseInt(1));
            });
            $("body").on("click", ".Pager .page", function () {
                GetCustomers(parseInt($(this).attr('page')));
            });
        });
  
        function SearchTerm() {
            return jQuery.trim($("[id*=txtSearch]").val());
        };
        function GetCustomers(pageIndex) {
            $.ajax({
                type: "POST",
                url: "PrintCodes.aspx/GetCustomers",
                data: '{searchTerm: "' + SearchTerm() + '", pageIndex: ' + pageIndex + '}',
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: OnSuccess,
                failure: function (response) {
                    alert(response.d);
                },
                error: function (response) {
                    alert(response.d);
                }
            });
        }
        var row;
        function OnSuccess(response) {
            var xmlDoc = $.parseXML(response.d);
            var xml = $(xmlDoc);
            var customers = xml.find("Customers");
            if (row == null) {
                row = $("[id*=gvCustomers] tr:last-child").clone(true);
            }
            var footer = $("[id*=gvCustomers] tr:last-child").clone(true);
            $("[id*=gvCustomers] tr").not($("[id*=gvCustomers] tr:first-child")).remove();
            if (customers.length > 0) {
                $.each(customers, function () {
                    var customer = $(this);
                    $("td", row).eq(0).html($(this).find("itemcode").text());
                    $("td", row).eq(1).html($(this).find("stockitem").text());
                    $("td", row).eq(2).html($(this).find("saleprice").text());
                    $("[id*=gvCustomers]").append(row);
                    row = $("[id*=gvCustomers] tr:last-child").clone(true);
                });
                $("[id*=gvCustomers]").append(footer);
                var pager = xml.find("Pager");
                $(".Pager").ASPSnippets_Pager({
                    ActiveCssClass: "current",
                    PagerCssClass: "pager",
                    PageIndex: parseInt(pager.find("PageIndex").text()),
                    PageSize: parseInt(pager.find("PageSize").text()),
                    RecordCount: parseInt(pager.find("RecordCount").text())
                });
  
                $(".Name").each(function () {
                    var searchPattern = new RegExp('(' + SearchTerm() + ')', 'ig');
                    $(this).html($(this).text().replace(searchPattern, "<span class = 'highlight'>" + SearchTerm() + "</span>"));
                });
            } else {
                var empty_row = row.clone(true);
                $("td:first-child", empty_row).attr("colspan", $("td", row).length);
                $("td:first-child", empty_row).attr("align", "center");
                $("td:first-child", empty_row).html("No records found for the search criteria.");
                $("td", empty_row).not($("td:first-child", empty_row)).remove();
                $("[id*=SearchGrid]").append(empty_row);
            }
        };
    </script>     
    <table>
        <tr>
            <td>Name:<asp:TextBox ID="txtName" runat="server"></asp:TextBox></td>
        </tr>
        <tr>
            <td>Country:<asp:TextBox ID="txtCountry" runat="server"></asp:TextBox></td>
        </tr>
        <tr>
            <td><asp:Button ID="btnInsert" runat="server" Text="Insert" OnClick="Insert" /></td>
        </tr>
    </table>
    <table class="auto-style1">
        <tr>
            <td class="auto-style7">
              Search items
              <asp:TextBox ID="txtSearch" runat="server" Width="183px"></asp:TextBox>
            </td>
            <td>&nbsp;</td>
        </tr>
        </table>
    <asp:GridView ID="gvCustomers" runat="server" AutoGenerateColumns="False">
        <Columns>
            <asp:BoundField HeaderText="Itemcode" DataField="Itemcode" />
            <asp:BoundField HeaderText="stockitem" DataField="stockitem" />
            <asp:BoundField HeaderText="SalePrice" DataField="Saleprice" />
            <asp:TemplateField>
                <HeaderTemplate>
                    Send Iterm
                </HeaderTemplate>
                <ItemTemplate>
                    <asp:LinkButton ID="lnkSend" Text="Send" runat="server" OnClick="Send"></asp:LinkButton>
                </ItemTemplate> 
            </asp:TemplateField>       
           <asp:TemplateField>
           <HeaderTemplate>
                <asp:CheckBox ID="chkAll" runat="server" OnCheckedChanged="chkAll_CheckedChanged" AutoPostBack="true" />
            </HeaderTemplate>
            <ItemTemplate>
                <asp:CheckBox ID="chk" runat="server" OnCheckedChanged="chk_CheckedChanged" AutoPostBack="true" />
            </ItemTemplate>
            </asp:TemplateField>     
        </Columns>
    </asp:GridView>
    <table class="auto-style1">
        <tr>
            <td class="auto-style4">
                <asp:Button ID="Button2" runat="server" Text="Print" />
            </td>
            <td>&nbsp;</td>
        </tr>
        <tr>
            <td class="auto-style4">&nbsp;</td>
            <td>&nbsp;</td>
        </tr>
    </table>
    <br />
    <asp:Panel runat="server" ID="pnlDetails" Visible="false">
        <table>
            <tr>
                <td><asp:Label ID="lblName" runat="server" Text=""></asp:Label></td>
                <td><asp:Label ID="lblCountry" runat="server" Text=""></asp:Label></td>
                <td><asp:Image ID="imgBarCode" runat="server" /></td>
            </tr>
        </table>
    </asp:Panel>
</asp:Content>