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Asked: 2026-05-11T07:37:10+00:00

i’ve noticed that popup shows BEFORE text gets updated in the textbox, i guess

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i’ve noticed that popup shows BEFORE text gets updated in the textbox, i guess js gets called before the page gets rendered … that would explain the ‘undefined’ popup … how do i make sure js gets called AFTER the page is rendered?

rewriting to make it as simple as possible:

<body> <form id='form1' runat='server'>     <asp:ScriptManager ID='ScriptManager1' runat='server'>     </asp:ScriptManager>     <asp:UpdatePanel ID='UpdatePanel1' runat='server'>         <ContentTemplate>             <asp:TextBox ID='txtRcaNotes' runat='server' TextMode='MultiLine' Width='800px'></asp:TextBox><br />             <asp:Button ID='btnDoneWithRcs' runat='server' OnClick='btnDoneWithRcs_Click' Text='Action Completed / Update Notes' />         </ContentTemplate>     </asp:UpdatePanel> </form>  <script type='text/javascript'>          var prm = Sys.WebForms.PageRequestManager.getInstance();             prm.add_endRequest(             function(){doStuff();}             );          function doStuff()         {             $(document).ready(function() {                                 $('txtRcaNotes').hide();                                  alert($('txtRcaNotes').attr('id'));                                 });         }  </script> </body>

Code Behind:

protected void btnDoneWithRcs_Click(object sender, EventArgs e) {     txtRcaNotes.Text += 'asdfadf'; }

TEXTBOX DOESN’T GET HIDDEN, ALERT() RETURNS ‘UNDEFINED’

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1 Answer

  1. You’re just missing your id selector syntax. Try:

    $('#<%= txtRcaNotes.ClientID %>').hide();  alert($('#<%= txtRcaNotes.ClientID %>').attr('id'));

    Note the addition '#' prepended before each selector.

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