Document.Ready() is not working after PostBack

I have a page that contains a user control within an update panel. $(document).ready(function() ) { is called and executes the code correctly when the page firsts loads but if the user clicks a button (within the user control), the document.ready() doesn’t get called (document.load, onload also don’t work)

I have researched this on the net and found similar problems but nothing that can explain why this isn’t working. What other causes can there be for document.ready not working?

Answers:

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Method 1

This will be a problem with partial postback. The DOM isn’t reloaded and so the document ready function won’t be hit again. You need to assign a partial postback handler in JavaScript like so…

function doSomething() {
   //whatever you want to do on partial postback
}

Sys.WebForms.PageRequestManager.getInstance().add_endRequest(doSomething);

The above call to add_endRequest should be placed in the JavaScript which is executed when the page first loads.

Method 2

Instead of $(document).ready you could use function pageLoad(){}.

It’s automatically called by the ScriptManager on a page, even on a postback.

Method 3

I’ve run into this a while ago, as El Ronnoco said, it has to go with the DOM not being reloaded. However you can simply change
$(document).ready(function() {
to

Sys.Application.add_load(function() {

This will force it to run on every postback.

You can use function pageLoad() as well, but you can only have one pageLoad function, whereas with Sys.Application.add_load, you can add as many handlers as you wish.

Method 4

Bestest way is

<asp:UpdatePanel...
<ContentTemplate
     <script type="text/javascript">
                    Sys.Application.add_load(LoadScript);
     </script>
 you hemla code gose here 
</ContentTemplate>
    </asp:UpdatePanel>

Javascript function

<script type="text/javascript">

        function LoadScript() {
            $(document).ready(function() {

                   //you code gose here 
                                    });
         }
</script>

or

Its under UpdatePanel than you need to register client script again using

ScriptManager.RegisterClientScript

or

$(document).ready(function() {
    // bind your jQuery events here initially
});

var prm = Sys.WebForms.PageRequestManager.getInstance();

prm.add_endRequest(function() {
    // re-bind your jQuery events here
    loadscript();

});


$(document).ready(loadscript);

function loadscript()
{
  //yourcode 
}

Method 5

This is an example that worked for me in the past:

<script>
function MyFunction(){ 
    $("#id").text("TESTING");
}
//Calling MyFunction when document is ready (Page loaded first time)
$(document).ready(MyFunction); 

//Calling MyFunction when the page is doing postback (asp.net)
Sys.WebForms.PageRequestManager.getInstance().add_endRequest(MyFunction);
</script>

Method 6

This code below works nice to solve this problem. As indicated in link posted before (http://encosia.com/document-ready-and-pageload-are-not-the-same/), when you have an asp.NET with updatePanels you shall use function pageLoad(). When you have only one page and in each postback it will be fully reloaded, the $(document).ready() is the right option.

Example using pageLoad:

    function pageLoad() {

        $(".alteraSoVirgula").keyup(function () {
            code here
        })
    }

Method 7

I was also facing the same problem but i found the jQuery $(document).ready event handler works when page loads, but after ASP.Net AJAX UpdatePanel Partial PostBack it does not get called. so use Sys.Application.add_load(function(){}); instead of $(document).ready.
This works perfectly for me 🙂

<script>
Sys.Application.add_load(function() {
//Your code
});
</script>

Method 8

$(document).ready(function () {
    PreRoles();
});

//On UpdatePanel Refresh
var prm = Sys.WebForms.PageRequestManager.getInstance();
if (prm != null) {
    prm.add_endRequest(function (sender, e) {
        if (sender._postBackSettings.panelsToUpdate != null) {
            PreRoles();
        }
    });
};

function PreRoles() {
    // Add codes that should be called on postback
}

Method 9

Most of the times, this is happening because of the Updatepanle.
Just put postback triggers to the button and it will solve this.

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0