how to show loading image when tab content is loading?

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have a tabcontainer with three panel,inside that i have gridview when i user click on the tab the gridview is loaded ,i want till the gridview is loading a img gif should be shown,and should got hide after the grid loads completly for that i had written code as

ASP.NET

<%@ Page Language="C#" AutoEventWireup="true"  CodeBehind="example.aspx.cs"     Inherits="example" %>  <%@ Register Assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"     Namespace="System.Web.UI" TagPrefix="asp" %> <%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head id="Head1"  runat="server">      <script type="text/javascript">         
 $(function() {            $("#mytab").mytab({                 ajaxOptions: {                     type: 'POST',                     data: postData,                     beforeSend: function() {                         $('#loader').show();                     },                     complete: function() {                         $("#loader").hide();                     }                 }             });         });  </script>   </head> <body>     <form id="form2"  runat="server">     <iframe id="iFrame2"  runat="server" height="2px" width="2px"></iframe>         <asp:UpdatePanel ID="UpdatePanel2" runat="server">     <contenttemplate>     <div>         <asp:ScriptManager ID="ScriptManager2" runat="server" EnablePartialRendering="true">                </div>   <asp:Panel ID="loader" runat="server" Wrap="true" CssClass="body"  >                     <table cellpadding="5" cellspacing="5" style="width:322px; height:245px; border:1">                         <tr>                             <td style="width:322px; height:245px; border:1">                                 <asp:Image ID="Image1" Width="322px" Height="245px" BorderWidth="0" runat="server" ImageUrl="Images/loading.gif" />                             </td>                         </tr>                     </table>                          <cc1:TabContainer ID="mytab"  runat="server"  Width="100%"                                 Visible="true" AutoPostBack="true" >                                 <cc1:TabPanel  runat="server"   HeaderText="application" ID="TabPanel1"                                      >                                     <contenttemplate>                                     <asp:Panel ID="Panel1" runat="server">                                         <table class="outline-tabs">                                             <tr class="pagination-row">                                              </tr>                                             <tr>                                                 <td>                                                     <asp:UpdatePanel ID="UpdatePanel3" runat="server">                                                         <contenttemplate>                                                             <asp:GridView ID="GridView1" runat="server" CssClass="tblGrid" AllowSorting="True">                                                                                                               </contenttemplate>                                                                                                      </td>                                             </tr>                                          </table>                                                                           </contenttemplate>                                                 </contenttemplate>          </form> </body> </html>

but when i run the application i get a error as Microsoft JScript runtime error: Object expected what is wrong in the above code,any file is missing,since i m using jquery

Posted 21-Jul-12 5:56am

software_Engi08

Updated 21-Jul-12 6:02am

Pankaj Nikam

v3

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WoodenLegNamedSmith 21-Jul-12 12:01pm

your TabContainer and TabPanel controls are prefixed with cc1, meaning its a custom control, make sure that it is registered and referenced in your project dependencies before building.

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Sandeep Mewara · Answer 1 · 2012-07-21T06:44:00

You can show your loading image using Update Progress since you are already using Update Panel.

Have a look at these samples to understand the implementation and working of Update Progress:
MSDN: UpdateProgress Control Overview[^]
CP: The UpdateProgress Control of ASP.NET AJAX Extensions[^]
AJAX.NET UpdateProgress control[^]
ASPNET Tutorial: Introduction to AJAX UpdateProgress Control in ASP.NET and C#[^]