JQuery BlockUI progress indicator in every Asp.net postback

Question

I would like to implement a jquery blockUI to popup and show a progress indicator (loading circle) during postbacks in Asp.Net. How can I implement this? I am using masterpages so I was wondering if I can implement this code in one place to keep it simple. Is this even possible? Looking forward to hear your thoughts on this.

Thanks in advance.

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I was able to develop this. I have included the steps in answers. Let me know if you have questions.

Solution 1

I figured it out myself.

1. Create a new Asp.net web project.

2. Include the following in Site.Master markup:

   <script type="text/javascript" src="../Scripts/jquery-1.4.1.min.js"></script>
   <script type="text/javascript" src="../Scripts/jquery.blockUI.js"></script>
   <script language="javascript" src="../Scripts/General.js" type="text/javascript"></script>
   
   <style>
     div.blockOverlay {
       background-color: #666;
       filter: alpha(opacity=50) !important;
       -moz-opacity:.50;
       opacity:.50;
       z-index: 200000 !important;
     }
     div.blockPage {
       z-index: 200001 !important;
       position: fixed;
       padding: 10px;
       margin: -38px 0 0 -45px;
       width: 70px;
       height: 56px;
       top: 50%;
       left: 50%;
       text-align: center;
       cursor: wait;
       background: url(ajax-loader.gif) center 30px no-repeat #fff;
       border-radius: 5px;
       color: #666;
       box-shadow:0 0 25px rgba(0,0,0,.75);
       font-weight: bold;
       font-size: 15px;
       border: 1px solid #ccc;
     }
   </style>
   

3. Add the following markup in default.aspx:

   <asp:UpdatePanel ID="UpdatePanel1" runat="server">
     <ContentTemplate><asp:Button ID="Button1" runat="server" Text="Button" 
           onclick="Button1_Click" /></ContentTemplate>
   </asp:UpdatePanel>
   

4. Add a progress indicator image (ajax-loader.gif) to project root

5. Add the following in General.js

   // BlockUI setup
   
   $.extend({
     // Block ui during ajax post back
     initializeUiBlocking: function () {
       if (typeof ($.blockUI) != 'undefined') {
         $.blockUI.defaults.message = 'LOADING';
         $.blockUI.defaults.overlayCSS = {};
         $.blockUI.defaults.css = {};
   
         var request = Sys.WebForms.PageRequestManager.getInstance();
         request.add_initializeRequest(function (sender, args) {
           request.get_isInAsyncPostBack() && args.set_cancel(true);
         });
         request.add_beginRequest(function () { $.blockUI(); });
         request.add_endRequest(function () { $.unblockUI(); });
       }
     }
   });
   
   $(document).ready(function () {
     $.initializeUiBlocking();
   });
   

Solution 2

Have a look at this
http://www.malsup.com/jquery/block/#overview
This works for ajax calls.

And you need to place the following line
$(document).ajaxStart($.blockUI).ajaxStop($.unblockUI);
in a place available to all pages.

Comments

[Ali Adnan]

OP Asked while Postback not Ajax Call