How can I run some javascript after an update panel refreshes?

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I have a pageLoad function which sets some css on an .ascx control that I cannot change. On page load everything is fine, but when an update panel updates the control, my css is no longer applied. How can I rerun my function after the page updates?

 $(function() {
        $("textarea").attr("cols", "30");
        $("input.tbMarker").css({ "width": "100px" }).attr("cols","25");
    });

This obviously only runs on the initial page load. How can I run it after an update?

Run a javascript function after UpdatePanel.Update(), would cause the function alert() to run every time the UpdatePanel returns some server side code runs, and I want to run a JS function after the server to run code when ONLY a particular UpdatePanel is refreshed - let me  I have a pageLoad function which sets some css on an .ascx control that I cannot change. On page load everything is fine, but when an update panel updates the control, my css is no longer applied.

Most simple way is to use MSAjax pageLoad Event in your javascript code :

<script> 
   ///<summary>
   ///  This will fire on initial page load, 
   ///  and all subsequent partial page updates made 
   ///  by any update panel on the page
   ///</summary>
   function pageLoad(){ alert('page loaded!') }  
</script>

I have used it many times, it works like charm. Most important thing is don't confuse it with document.ready function (which will be executed only once after the page Document Object Model (DOM) is ready for JavaScript code to execute),yet pageLoad Event will get executed every time the update panel refreshes.

Source: Running script after Update panel AJAX asp.net

Call JavaScript function after AJAX UpdatePanel Refresh (Partial , Here Mudassar Ahmed Khan has explained how to call JavaScript function after AJAX UpdatePanel Refresh or Partial PostBack  In this article I will explain how to call JavaScript function after AJAX UpdatePanel Refresh or Partial PostBack (Asynchronous request) in ASP.Net. In order to call JavaScript function after AJAX UpdatePanel Refresh or Partial PostBack ( Asynchronous request ), the AJAX PageRequestManager endRequest event handler will be used.

Add the code in the same form you placed your Script Manager.

Code Behind:

protected void Page_Load(object sender, EventArgs e)
{
    if (ScriptManager1.IsInAsyncPostBack)
    {
        StringBuilder sb = new StringBuilder();
        sb.Append("<script language='javascript' type='text/javascript'>");
        sb.Append("Sys.Application.add_load(func);");
        sb.Append("function func() {");
        sb.Append("Sys.Application.remove_load(func);");
        sb.Append("alert('I am Batman!');");
        sb.Append("}");
        sb.Append("</script>");
        ScriptManager.RegisterStartupScript(this, GetType(), "script", sb.ToString(), false);
    }
}

[Solved] Javascript is not working after update panel postback , see this.. :) How to have a javascript callback executed after an update panel postback?[^] Javascript in update panel doesn't work after partial  tie into the MSAjax Event. function pageLoad() { } this will fire every time the update panel refreshes.. you can do your rebinding / new bindings there. and yes, that's all you need to do, put that on the page and it will fire.

During your postback for the update panel, in the server code, use ClientScriptManager to add some new script to the page, something like this:

ClientScriptManager.RegisterStartupScript(
       typeof(page1), 
       "CssFix", 
       "javascriptFunctionName()", 
        true);

Encapsulate your javascript in a named function that matches the third argument there, and it should execute when the postback returns.

Execute JavaScript when an UpdatePanel is updated, I've just spent a few hours banging my head against a wall trying to get ASP.NET to execute a JavaScript function each time an UpdatePanel is updated. Simply putting RegisterStartupScript to register the script to be run. The only thing you need to do to refresh from javascript is to register a Button (hidden via CSS) Click event as async trigger for an UpdatePanal and then call the following method from your javascript method: __doPostBack ('<%= Button_Search.ClientID %>', '');

You can also bind to an event in client side code (JavaScript) every time an UpdatePanel has finished like this:

        Sys.WebForms.PageRequestManager.getInstance().add_endRequest(function(){myFunction();});

So in this case myFunction(); will be called every time an UpdatePanel postback has occurred. If you execute this code when the page is loaded the function will be called on the correct time.

Call JavaScript function after UpdatePanel Refresh (Partial , I have a pageLoad function which sets some css on an .ascx control that I cannot change. On page load everything is fine, but when an update panel updates  @Niloo : You dont have to re-add the script files after each partial/full postback. You just have to call the functions you need to run after each postback / write events inside pageLoad(){ // } in the js files. I will also edit the answer with an example.. :) – Avishek Dec 27 '12 at 6:58

asp.net How can I run some javascript after an update panel , asp.net How can I run some javascript after an update panel refreshes? <script> ///<summary> /// This will fire on initial page load, /// and all subsequent partial  In this scenario, the control explicitly triggers an update of the panel content. The control can be either inside or outside the UpdatePanel control that defines the trigger. The ChildrenAsTriggers property is set to true and a child control of the UpdatePanel control causes a postback.

Executing Custom Javascript Code after AJAX Update, This help article shows a few ways to execute custom JavaScript code after an AJAX update. The best and most intuitive approach is to use the ResponseScripts  I don't have an issue when it comes to loading my content on page load. But if I try and carry out a search to update my javascript array literal within my updatepanel, I found that the literal gets updated on postback after the javascript has already fired. Here is a basic example of what I have:

__doPostBack is refreshing my whole page, not just UpdatePanel , in an update panel based on some javascript after the user enters data. __​doPostBack is refreshing my whole page, not just UpdatePanel If that's not taken into account, it's very easy to run into mysterious difficulties. Here Mudassar Ahmed Khan has explained how to refresh (reload) UpdatePanel from JavaScript in ASP.Net. Refreshing or reloading is achieved by making an ASP.Net AJAX UpdatePanel do a PostBack using JavaScript. This article will explain the different ways you can refresh or reload an UpdatePanel using JavaScript. 1. Using Hidden Button 2. Using __doPostBack TAGs: ASP.Net, AJAX

Comments
  • Tie into the MSAjax pageLoad event on the client side: stackoverflow.com/questions/9026496/…
  • stackoverflow.com/a/339114/900284
  • This is great! Also, if there is no explicit Panel (e.g. maybe you're using some Telerik Control that uses UpdatePanels behind the scenes), you can also use sender._postBackSettings.asyncTarget to verify if the current postback is the one you're looking for.
  • awesome ! i have been looking since a long time for a way to keep javascript executing while update panel refreshes, thanks for your answer !
  • Just worked through this situation on a project - this was the simplest and most reliable for me. The add_pageLoaded and RegisterStartupScript approaches were harder to track & debug through callbacks, but pageLoad Just Works(tm)
  • var firstload = 0; function pageLoad() { if (firstload==0)firstload=1; else { alert('Postback!'); }